The American Naturalist, Volume 6Essex Institute, 1872 |
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Página 15
... hundred in the specimen figured . As the embryos develop , the mass probably pushes further back in the cavity and also extends the abdominal walls . That the fish is viviparous is proved by the statement made by Mr. Thompson before the ...
... hundred in the specimen figured . As the embryos develop , the mass probably pushes further back in the cavity and also extends the abdominal walls . That the fish is viviparous is proved by the statement made by Mr. Thompson before the ...
Página 21
... hundred eggs in each . As in both species there were no signs of the embryos in the eggs , it is not probable that any of the eggs had been developed and the young excluded , nor is it at all likely that the great vari- ation in the ...
... hundred eggs in each . As in both species there were no signs of the embryos in the eggs , it is not probable that any of the eggs had been developed and the young excluded , nor is it at all likely that the great vari- ation in the ...
Página 32
... hundred or one thousand di- ameters , however , it is still difficult to obtain good definition or to fully light both fields . THE RATTLESNAKE AND NATURAL SELECTION . BY PROF . N. S. SHALER . FOR Some years I have been teaching that ...
... hundred or one thousand di- ameters , however , it is still difficult to obtain good definition or to fully light both fields . THE RATTLESNAKE AND NATURAL SELECTION . BY PROF . N. S. SHALER . FOR Some years I have been teaching that ...
Página 32
... hundred or one thousand di- ameters , however , it is still difficult to obtain good definition or to fully light both fields . THE RATTLESNAKE AND NATURAL SELECTION . BY PROF . N. S. SHALER . FOR Some years I have been teaching that ...
... hundred or one thousand di- ameters , however , it is still difficult to obtain good definition or to fully light both fields . THE RATTLESNAKE AND NATURAL SELECTION . BY PROF . N. S. SHALER . FOR Some years I have been teaching that ...
Página 56
... hundred miles along , and about twenty miles in breadth ; the formation is not continuous , being sometimes , as stated ( in conversation ) by Prof. C. U. Shepard , Jr. , replaced by ferruginous sand . It has already been largely used ...
... hundred miles along , and about twenty miles in breadth ; the formation is not continuous , being sometimes , as stated ( in conversation ) by Prof. C. U. Shepard , Jr. , replaced by ferruginous sand . It has already been largely used ...
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Palavras e frases frequentes
abundant allied Amblyopsis AMER American angular aperture animal appear arrowheads Asa Gray base birds blind fish bones Botany cave cells character collection color common coral Cretaceous crustaceans described Devonian diameter edge eggs Elliott Coues elytra epidermis eyes fact fauna feet female figured flowers fossil genera genus geology give glacial glass habits head hundred inches Indian insects interesting islands jasper Journal known Lake larva larvæ leaves length lens less male Mammoth Cave Mass ment microscope miles mountains Natural History NATURALIST nearly nest North noticed O. C. Marsh object observed obtained ornithology pamph paper peculiar Plains plants plate portion prairies present probably Prof region remarks represented River rocks says scientific seems seen side South sparrow species specimens stomata stone streams surface tail tion trees valley vegetation wings Wyandotte Cave Zoology