The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 53
... fins separate ; soft dorsal fin fairly long - based ; anal fin small , with 2 spines ( most percoids have 3 or more ) ; lateral line continues out to posterior end of caudal fin ( unusual for most percoids ) ; air bladder often with ...
... fins separate ; soft dorsal fin fairly long - based ; anal fin small , with 2 spines ( most percoids have 3 or more ) ; lateral line continues out to posterior end of caudal fin ( unusual for most percoids ) ; air bladder often with ...
Page 56
... fins gener- ally resemble those in the tropical blennies . Superfamily Blennioidea ( tropical blennies ) All soft , articulated fin rays in the dorsal , anal , and pelvic fins unbranched ; pelvic fins , which are seldom greatly re ...
... fins gener- ally resemble those in the tropical blennies . Superfamily Blennioidea ( tropical blennies ) All soft , articulated fin rays in the dorsal , anal , and pelvic fins unbranched ; pelvic fins , which are seldom greatly re ...
Page 489
... fins are known in very few Placodermi ; their structure can often be inferred from information provided by supporting skeletal elements . Some authori- ties consider long - based pectoral fins as primitive , but within the Placodermi such ...
... fins are known in very few Placodermi ; their structure can often be inferred from information provided by supporting skeletal elements . Some authori- ties consider long - based pectoral fins as primitive , but within the Placodermi such ...
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activity America animals appear areas atoms became become body called camera century changes characteristics chemical Church colour common complete compounds consists containing continued drugs early effect electrons elements energy example existence experience Family field Figure fins fishes groups human important increase individual industry Italy known later lens less light liquid living lower major material means ment methods move movement natural North object occur organic original Peking Pentecostal percent period permafrost personality pest Peter petroleum Philip philosophy photographs plants political position possible practice present printing problems production Quakers range region result rocks similar social South species structure surface temperature theory tion United usually widely