Hab. In damp, shaded places, among mosses and the larger Hepatica. Hickson's Wood, D. McA., 1894; Connor hill, and on the west side of Mount Brandon, F. W. M. and D. McA., July, 1881; Maghanabo glen, D. McA., 1875; Lough Duff, Lett and McA., May, 1899; Derrymore glen, Lett and McA., May, 1899;

rare.

6. Lejeunea Holtii, Spruce, Journal of Botany, vol. 25, p. 33, pl. 272, 1887.

Hab. On wet rocks in shaded places, among mosses and the larger Hepaticæ. In the crevices of rocks among Fissidens taxifolius, Loughanscaul, D. McA., May, 1894, Mount Eagle lake, Lett and McA., Septr., 1898; shores of Barnanaghea lough, Lett and McA., Septr., 1898; Lough Nalachan, Mount Brandon, Lett and McA., May, 1899. This rare Lejeunea, which had hitherto been only known to grow at Killarney, differs from every other Lejeunea in the female flowers, being borne on exceedingly short branchlets, which normally put forth no sub-floral innovations, such as constantly exists in all our other species. In size it resembles L. flava, or luxuriant serpyllifolia, but usually differs at sight from both by the pale, reddish tinge of the foliage. Even where the leaves are of the yellow-green of almost ripe limes, dried specimens speedily assume a rufus hue when moistened. Another important and unique character is afforded by the large pearshaped perianths being so very strongly and sharply keeled that at first sight they seem broadly five-winged. The female flowers often alternate, or are variously mixed up with male catkins of about the length of the adjacent leaf, and consisting of from two to five pairs of cymbiform bracts. Where inflorescences of both sexes are numerous they render the stem or branch elegantly pinnulate. The only species which L. Holtii might be confounded with is L. flava, which grows near it. Although nearly equal in size is far more delicate and pellucid, and its usual slight tinge of red is never seen in the yellow or green foliage of L. flava. The latter, besides the essential difference of the perianths being terminal on branches of various lengths, or on the main stem, and invariably putting forth from their base a leafy innovation, or even a pair of opposite innovations, each of which may in like manner bear an apical flower, subtended by a secondary innovation, differs also in the tufted habit, the imbricated leaves (which, although only slightly

different in form, have smaller and more chlorophyllose cells), but, above all, in much smaller obtusely five carinate perianths, as compared with the large, deeply plicato-carinate perianths of L. Holtii. (Spruce.)

7. Lejeunea ulicina, Taylor. Jungermania ulicina, Tayl., in Trans. Bot. Soc., Edinb., p. 115, 1841: Jungermania minutissima, Hook. Brit. Jung., t. 52, ex parte, nec Smithii. Pearson, Hepat., Brit. Isles, p. 54, pl. XIV., fig. 1.

Hab. On the trunks of trees, among mosses, and on the smooth bark, rocks, etc.; Loughanscaul, among Hypnum, on the damp rocks, Lett and McA., Septr., 1898, rare.

8. Lejeunea diversiloba, Spruce, Journ. of Bot., 1876; Lejeunea minutissima, var. major, Carrington, Trans. Bot. Soc., Edin., vol. 8, p. 468, tab. 17, fig. 1; Pearson's Hepat., Brit. Isles, p. 56, plate 15, 1899.

Hab. On moist rocks, and on the trunks of trees, often epiphytic on the larger hepatics and mosses, on damp rocks among Metzgeria conjugata, Connor hill, F. W. M. and D. McA., July, 1881; Lett and McA., September, 1898; Loughanscaul, Lett and McA., September, 1898; Coumanare lakes, Lett and McA., September, 1898; Barnanaghea lough, Lett and McA., Septr., 1898; Lough Nalachan, Brandon, Lett and McA., May, 1899,

rare.

9. Lejeunea hamatifolia, Hook., Dum. Jungermania hamatifolia, Hook., Brit. Jung., t. 54.

Hab. On damp rocks, decayed wood, and on the bark of trees, and among the larger mosses and hepatics. On the bare rocks, Connor hill, with L. calyptrifolia, Lindberg and Moore, July, 1873, very fine, with perianths, Lett and McA., Septr., 1898; Mount Eagle, F. W. M. and D. McA., July, 1881; Lett and McA., 1898; Loughanscaul, D. McA., 1894; on Radula Carringtoni, Lett and McA., Septr., 1898; Lough Adoon, F. W. M. and D. McA., April, 1897; Barnanaghea lough, Lett and McA., 1898; on rocks, Lough Duff, in the Brandon valley, Lett and McA., May, 1899; on the north-east side of Mount Brandon, Lett and McA., June, 1900.

10. Lejunea calcarea, Libert in Bory. de St. Vine. Ann des Sc. Nat. vi.,

p. 373., n. 1, t. 96, f. 1 ; Jungermania hamatifolia, var. echinata, Hook., Brit. Jung., 1816; Lejeunea calcarea, Pearson, Hepat., British Isles, p. 59, plate 16.

Hab. On rocks in shady places; Mount Eagle, F. W. M. and D. McA., July, 1881; Connor hill, Lett and McA., Septr., 1897,

rare.

11. Lejeunea minutissima, Smith, Eng. Bot., t. 1633; Hook., Brit. Jung., tab. 52 (excepting fig. 3, which is ulicina). Jungermania inconopicua, Raddi, in Act. Soc. Mod., 1818, Pearson Hep., Brit. Isles, p. 61, pl. 18.

Hab. On the trunks of trees and on decayed wood, and among the larger mosses and hepatics. Glen, on Mount Brandon, Dr. Moore; Connor Hill, Moore and Lindberg, 1873; Burnham Wood, fertile, D. McA., May, 1894; in Hickson's Wood, near Anascaul, Lett and McA., Sept., 1898.

12. Lejeunea microscopica, Taylor. Jungermania microscopica, Tayl. in Fe. Hib. II., p. 59; Tayl. in Hooker's Journal of Botany, 4; p. 97, t. 29; Pearson. Hep. Brit. Isles, p. 63, plate 19, 1899.

Hab. Epiphytic on the larger hepatics as Frullania, and among the branches of Thamnium and other mosses. Glen, on Mount Brandon, Dr. Moore; very fine on the N.E. side on Diplophyllum, Lett and McA., June, 1900. On Frullania, Connor hill, Lindberg and Moore, 1873. D. McA., Sept. 1877. Loughanscaul, Lett and McA., Sept. 1898. Extremely rare, from its minuteness may easily escape detection and doubtless occurs in other localities in the peninsula.

13. Lejeunea calyptrifolia, Hook. Dum. Jugermania calyptrifolia, Hook. Dum. Brit., Jung., t. 43.

Hab. On the trunks of trees often epiphytic on Frullania, and on the bare moist rock. Connor hill, near the "Doctor's Well," on barren rocks, Lindberg and Moore, 1873. F. W. M. and D. McA., July, 1881. Lett and McA., Sept., 1897-8. Loughanscaul on Frullania, Lett and McA., Septr., 1897. On the stems of Abies and Pinus in Hickson's Wood, fertile, D. McA., May, 1894. On Diplophyllum associated with L. ovata, Barnanaghea, Lett and McA., June, 1899.

Tribe II.-JUNGERMANIEÆ.

Sub-tribe I.-RADULEE.

Genus 4.-RADULA, Dumort.

1. Radula voluta, Taylor in G. I. N. Synop. Hep., p. 253. Radula Xalapensis, Lindberg, Hepat. Hib., 1875. Moore, Irish Hepat., p. 616; Pearson, Hep. Brit. Isles, p. 67., pl. 21.

Hab. On moist rocks and on the trunks of trees. Burnham Wood, Ventry, D. McA., 1894. On rocks, Mount Eagle lake,

Lett and McA., Septr., 1897 (rare).

2. Radula aquilegia, Taylor. Jungermania aquilegia, Tayl. Trans. Bot. Soc. Edin., vol. xi., p. 115–117. Pearson, Hep. Brit. Isles., p. 74., plate 25.

Hab. On wet rocks, often epiphytic on Frullania. Shores of Dingle bay, Carrington, 1863. Connor hill, D. McA., 1877. On the west side of Mount Brandon, F. W. M. and D. McA., April, 1897, Mount Eagle, Lett and McA., 1898. On Frullania Tamarisci, Anascaul, D. McA., 1894; Lett and McA., 1898. Burnham Wood, Lett and McA., Lough Nalachan, Lett and McA., 1899; Derrymore glen, Lett and McA., May, 1899. 3. Radula Carringtoni, Jack in Flora, p. 385. Radula aquilegia, Taylor, var. major, Carrington Trans. Bot. Soc. Edin. vii., p. 455. McArdle and Lett, Hepatica of Torc Waterfall, Killarney, 1897, p. 321, Plate VIII., 1899, Proc. R.I.A., vol. v. n. 2, 1899.

Hab. On wet rocks and on the larger hepatics, Loughanscaul, D. McA. May, 1894. Lett and McA., May, 1898 (fertile). Mount Eagle lake, Lett and McA., May, 1898. Lough Nalachan, Brandon, Lett and McA, May, 1899, near the summit on N.E. side, Lett and McA., 1900. Lough Duff in the Brandon valley (rare), Lett and McA., May, 1899.

4. Radula complanata, L. Dum.

Brit. Jung., t. 81.

Jungermania complanata, Hook.

Hab. On the trunks of trees, rarer on rocks (common).

Sub-tribe II.-PORELLEE.

Genus 5.-PORELLA, Dill.

1. Porella platyphylla, L. Lindberg. Muse. Scand., p. 3. Jungermania platyphylla, Hook, Brit. Jung., t. 40.

Hab. On rocks and on the trunks of trees. Mount Brandon, west, F. W. M. and D. McA., 1881. On the N.E. side on rock, Lett and McA., June, 1900. Lough Nalachan, Lett. and McA., 1899. Lough Adoon, D. McA., 1894. Lett and McA., Septr., 1897. Mount Eagle lake, Lett and McA., 1898. Anascaul, D. McA., May, 1894.

2. Porella thuja, Dicks, Moore.

Jungermania thuja, Dicks Pl.

Crypt. Brit. Fasc. 4., p. 19.

Hab. On rocks, and on the trunks of trees. Mount Brandon, Dr. Moore, 1864, Lett and McA., 1899. Anascaul, D. McA., May, 1894. Mount Eagle lake, Lett and McA., 1898.

3. Porella pinnata, Dill. Lindberg. Jungermania porella, Dicks. Trans Linn Soc. ш., p. 239. Porella pinnata, Lindb. Hepat. Hib. Acta Soc., fenn x. 2, 493. Pearson, Hepat. Brit. Isles, p. 89, Plate 32.

Hab. On wet rocks and on stones. In caves, Connor hill, Lindberg and Moore, 1873. On wet rocks, Anascaul, D. McA., May, 1894. Lough Adoon on Cinclidotus, Lett and McA., Septr., 1897. Lough Nalachan, Brandon, Lett and MCA., 1899 (rare).

Genus 6.-PLEUROZIA.

1. Pleurozia cochleariformis, Weiss, Dum. Jungermania cochleariformis, Weiss, Pl. Crypt. p. 123. Hook. Brit. Jung., t. 68.

Hab. On wet bogs, damp banks, and swampy places. A beautiful and remarkable plant, common in the peninsula.

Sub-tribe III.-PTILIDIEÆ.

Genus 7.-ANTHELIA, Dumort.

1. Anthelia julacea, L. Dum. Jungermania julacea, Linn. Sps. pl., p. 1601; Hook. Brit. Jung., tab. 2.

Hab. On wet peaty banks, and on rocks. Common in the mountainous forts of the peninsula.

Var. minor, Moore, Irish Hepat., p. 636; Mount Brandon, Dr. Moore, 1876; Connor hill, Dr. Moore, 1876. On the west side of Mount Brandon, F. W. M. and D. McA., April,

1897.

Genus 8.-HERBERTA, Bennett, Gray.

1. Herberta adunca, Dicks, B. Gr. Jungermania adunca, Dicks, Fasc. pl. Crypt. Brit. 3, p. 12, t. 8, fig. 8.

Hab. Growing in dense tufts on the shelving crags and banks at high elevations. A very fine hepatic, distinct from all others, common at high elevations in the peninsula.