Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 41 – 42The Society, 1902 |
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Сторінка 14
... forms ( Fam . A in part , petrificata , etc. ) , and use for them a genus " Xylina Ochs . or Tr . , " whereas Ochsen- heimer has no generic term so spelled . They then reject the Hade- noid forms ( Fam . B in part ) , which include ...
... forms ( Fam . A in part , petrificata , etc. ) , and use for them a genus " Xylina Ochs . or Tr . , " whereas Ochsen- heimer has no generic term so spelled . They then reject the Hade- noid forms ( Fam . B in part ) , which include ...
Сторінка 52
... forms . Goette has divided bilateral animals into two groups : ( 1 ) the pleurogastric , in which the chief axis of the egg becomes the chief axis of the larva or adult , as in Sagitta and the echinoderms , and ( 2 ) the hypogastric ...
... forms . Goette has divided bilateral animals into two groups : ( 1 ) the pleurogastric , in which the chief axis of the egg becomes the chief axis of the larva or adult , as in Sagitta and the echinoderms , and ( 2 ) the hypogastric ...
Сторінка 61
... form is usually solid , the cœlom and enteron having undergone extensive if not complete degeneration , while in those forms in which the cœlom is still preserved its method of origin is highly peculiar . For example , in the ...
... form is usually solid , the cœlom and enteron having undergone extensive if not complete degeneration , while in those forms in which the cœlom is still preserved its method of origin is highly peculiar . For example , in the ...
Сторінка 66
... forms presented by the latter , their many secondary characters , and the conflicting accounts of their structures and homologies which have been given by various authors . There is some reason for believing however that the ectoproct ...
... forms presented by the latter , their many secondary characters , and the conflicting accounts of their structures and homologies which have been given by various authors . There is some reason for believing however that the ectoproct ...
Сторінка 69
... forms a loop , the anus opening near the mouth , and that fixa- tion takes place by the posterior extremity , has led to Caldwell's view as to the homologies of the body surfaces in the brachiopods . On the other hand the ventral mantle ...
... forms a loop , the anus opening near the mouth , and that fixa- tion takes place by the posterior extremity , has led to Caldwell's view as to the homologies of the body surfaces in the brachiopods . On the other hand the ventral mantle ...
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Africa AMER AMERICAN PHILOSOPHICAL SOCIETY animals appear April Asia Australia auta autic beds belong blastopore body brachiopods Cambaroides Cambarus canals cells Central chromosomes cœlom connection contains crude oil Crustacea crystals curves Decapods deposits distillates distribution division domeykite drones eggs enteron Eocene equation evidence existence fact fauna Feb'y fertilization follicle formation forms fossils freshwater genera genus geographer geological Greater Antilles hydrocarbons islands Jan'y Jurassic land larva larvæ later Lower Cretaceous male mantle mass Mesozoic method Mexico Miocene nature Noctua North northern nuclei observed Ocean Oligocene origin parthenogenesis Pennsylvania petroleum Philadelphia PHILOS plate Pliocene polar body posterior Potamobius present probably PROC produced Prof queen region relation represented river sandstones separated shown solution South America southern species spermatocyte spermatogonia spermatozoa stage Terebratulina Tertiary theory tion Upper Cretaceous Zool