Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 41 – 42The Society, 1902 |
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Сторінка 17
... origin- ally held as allied , until the type is made also the type of Tænio- campa , Guenée , which must fall . 1816. HUEBNER , Verzeichniss , 220 . Has no genus , but a Stirps Graphiphoræ , which comprises numerous genera , mostly of ...
... origin- ally held as allied , until the type is made also the type of Tænio- campa , Guenée , which must fall . 1816. HUEBNER , Verzeichniss , 220 . Has no genus , but a Stirps Graphiphoræ , which comprises numerous genera , mostly of ...
Сторінка 61
... origin is highly peculiar . For example , in the Phylactolæmata the central cavity of the em- bryo is generally considered to be the cœlom , although at the stage at which it appears there is neither endoderm nor enteric cavity in the ...
... origin is highly peculiar . For example , in the Phylactolæmata the central cavity of the em- bryo is generally considered to be the cœlom , although at the stage at which it appears there is neither endoderm nor enteric cavity in the ...
Сторінка 85
... origin again lends support to the view concerning their individuality in the resting cell . A still greater condensation of the granules leads to a shortening and thickening of the chromosomes ( Figs . 37 and 38 ) , the final result of ...
... origin again lends support to the view concerning their individuality in the resting cell . A still greater condensation of the granules leads to a shortening and thickening of the chromosomes ( Figs . 37 and 38 ) , the final result of ...
Сторінка 86
... origin of the first maturation spindle - fibres it is difficult to be certain , but they appear to arise , at least in part , from within the nucleus . The centrosome is not evident until a rather late prophase ( Figs . 39 , 40 , 43 ) ...
... origin of the first maturation spindle - fibres it is difficult to be certain , but they appear to arise , at least in part , from within the nucleus . The centrosome is not evident until a rather late prophase ( Figs . 39 , 40 , 43 ) ...
Сторінка 90
... origin is , therefore , not the same as that of the bundles of Oniscus . The term " compound spermatozoon " has been suggested to me , but the word spermatozoon might carry with it certain implications with regard to behavior in ...
... origin is , therefore , not the same as that of the bundles of Oniscus . The term " compound spermatozoon " has been suggested to me , but the word spermatozoon might carry with it certain implications with regard to behavior in ...
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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