ScienceJohn Michels (Journalist) 1940 |
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Page 105
... species exist . In his classical monograph1 von Graff listed 348 species ( some , however , probably synonyms ) and probably two hundred additional species have been described since that time . As great areas of the tropics remain ...
... species exist . In his classical monograph1 von Graff listed 348 species ( some , however , probably synonyms ) and probably two hundred additional species have been described since that time . As great areas of the tropics remain ...
Page 106
... species from Yucatan , Mexico . Since then a second species of the genus has been found on Barro Colorado Island , Canal Zone , 12 and now the Appalachian form is the third member . All three species are practically iden- tical in ...
... species from Yucatan , Mexico . Since then a second species of the genus has been found on Barro Colorado Island , Canal Zone , 12 and now the Appalachian form is the third member . All three species are practically iden- tical in ...
Page 357
... species , usually , if not exclusively , for the sake of adaptation of the species to specific conditions within the area which it is able to occupy . " This process has nothing to do with the origin of new species : ' the subspecies ...
... species , usually , if not exclusively , for the sake of adaptation of the species to specific conditions within the area which it is able to occupy . " This process has nothing to do with the origin of new species : ' the subspecies ...
Contents
STEVENS S S and J VOLKMANN Sensory Discrimina | 1 |
Civil Service Positions 232 | 9 |
LUKENS F D W and F C DOHAN Diabetic Cats 222 | 10 |
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