Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 41 – 42The Society, 1902 |
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... respects Cistella is very unlike Terebratulina ; in the latter the archenteron is first divided into two cavities and not three ( the enterocoel is for a long time unpaired ) , and the single partition wall by which this division is ...
... respects Cistella is very unlike Terebratulina ; in the latter the archenteron is first divided into two cavities and not three ( the enterocoel is for a long time unpaired ) , and the single partition wall by which this division is ...
Сторінка 59
... respects the indeter- minate cleavage of echinoderms , Phoronis and ectoproctous Bryozoa . 2. Mesoderm and Calom . - The ... respect . In chaetognaths the method of cœlom formation is more like that in brachiopods - in fact Kowalevsky ...
... respects the indeter- minate cleavage of echinoderms , Phoronis and ectoproctous Bryozoa . 2. Mesoderm and Calom . - The ... respect . In chaetognaths the method of cœlom formation is more like that in brachiopods - in fact Kowalevsky ...
Сторінка 65
... respects in which Actinotrocha differs decidedly from the brachiopod larva : ( 1 ) The cœlom consists of an anterior ... respect there is a decided difference between the brachiopod and Phoronis . The resemblances mentioned above 1 The ...
... respects in which Actinotrocha differs decidedly from the brachiopod larva : ( 1 ) The cœlom consists of an anterior ... respect there is a decided difference between the brachiopod and Phoronis . The resemblances mentioned above 1 The ...
Сторінка 70
... respects the most thorough and extensive which has yet been done on the devel- opment of Actinotrocha , and in many very important points he differs decidedly from Masterman . Some of the differences be- tween Actinotrocha and the ...
... respects the most thorough and extensive which has yet been done on the devel- opment of Actinotrocha , and in many very important points he differs decidedly from Masterman . Some of the differences be- tween Actinotrocha and the ...
Сторінка 99
... respects established . A more detailed and thor- ough examination of the spermatozoa of the Crustacea , especially of their behavior in fertilization , might extend these homologies . If the spermatozoon of Oniscus be compared with the ...
... respects established . A more detailed and thor- ough examination of the spermatozoa of the Crustacea , especially of their behavior in fertilization , might extend these homologies . If the spermatozoon of Oniscus be compared with the ...
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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