Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 41 – 42The Society, 1902 |
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Сторінка 11
... increased the confusion , which is the more to be regretted since his structural observations are usually so valuable . To sum up : There seems no use in disturbing Duponchel's type , pronuba , for Triphæna , until it is settled whether ...
... increased the confusion , which is the more to be regretted since his structural observations are usually so valuable . To sum up : There seems no use in disturbing Duponchel's type , pronuba , for Triphæna , until it is settled whether ...
Сторінка 49
... increases in size the epithelium becomes less regular , particularly at the anterior end , and here many mesenchyme cells come to lie in the cavity of the enterocol ( Figs . 20 , 21 , 426 , 43 ) . Later such mesenchyme cells are found ...
... increases in size the epithelium becomes less regular , particularly at the anterior end , and here many mesenchyme cells come to lie in the cavity of the enterocol ( Figs . 20 , 21 , 426 , 43 ) . Later such mesenchyme cells are found ...
Сторінка 74
... increased promi- nence of the mantle and the lobulation of the colom . Fig . 28. Optical longitudinal section of a larva of the same stage as the pre- ceding , showing the dorsal and ventral mantle folds ( Md and Mv ) ; apical sense ...
... increased promi- nence of the mantle and the lobulation of the colom . Fig . 28. Optical longitudinal section of a larva of the same stage as the pre- ceding , showing the dorsal and ventral mantle folds ( Md and Mv ) ; apical sense ...
Сторінка 75
... increased prominence of mantle and deep constriction of anterior mantle furrow . Fig . 33. Dorsal view of an older larva , showing the mantle in process of growing back over the peduncle ; the cœlom is almost entirely confined to the ...
... increased prominence of mantle and deep constriction of anterior mantle furrow . Fig . 33. Dorsal view of an older larva , showing the mantle in process of growing back over the peduncle ; the cœlom is almost entirely confined to the ...
Сторінка 121
... increased dimensions of this lake proposed by Darton . If we confine it , however , to the much more restricted limits given by Dr. Scott we still have a lake of very considerable dimensions , greatly exceeding in size those of any ...
... increased dimensions of this lake proposed by Darton . If we confine it , however , to the much more restricted limits given by Dr. Scott we still have a lake of very considerable dimensions , greatly exceeding in size those of any ...
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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