The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 20
... species of Holothyrus is known to secrete an irritant substance that is toxic to fowl and man . The house - mouse mite ( Liponyssoides sanguineus ) , which transmits the disease rickettsialpox to man , probably is the most important species ...
... species of Holothyrus is known to secrete an irritant substance that is toxic to fowl and man . The house - mouse mite ( Liponyssoides sanguineus ) , which transmits the disease rickettsialpox to man , probably is the most important species ...
Page 958
... species , dominate soil and fresh- water communities . The terrestrial macrofauna consists entirely of arthropods , which number about 130 species . Of these , 54 are parasitic on birds and seals . The princi- pal arthropod groups ...
... species , dominate soil and fresh- water communities . The terrestrial macrofauna consists entirely of arthropods , which number about 130 species . Of these , 54 are parasitic on birds and seals . The princi- pal arthropod groups ...
Page 1073
... species . Family Diguetidae ( diguetids ) . Six eyes ; long carapace covered by scales ; abdomen covered by scales and hairs ; live beneath a vertical silk tube with a horizontal sheet of threads ; known only from the North American ...
... species . Family Diguetidae ( diguetids ) . Six eyes ; long carapace covered by scales ; abdomen covered by scales and hairs ; live beneath a vertical silk tube with a horizontal sheet of threads ; known only from the North American ...
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