... (1950:203)has mentioned the difficulty of defining the range of sirtalis in thesouthern Great Plains because of misidentifications of the similarT...
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...Experience with the living frogs in theirnatural habitats has been helpful in defining the species and informulating ideas concerning their relationships...
William E. Duellman 「Descriptions of Two Species of Frogs, Genus Ptychohyla」
...Characters defining the family are evidently the more specializedcranial features, which probably evolved during Mississippian andearly Pennsylvanian times...
Theodore H. Eaton 「A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas」
...Since beginning my studies of the Mexican leptodactylids in 1962,I have become acutely aware of difficulties involved in defining thegenera...
John D. Lynch 「Genera of Leptodactylid Frogs in México」
...On the other hand, if the nature of the hemipenisis of no importance in defining supergeneric groups of colubridsnakes, Tantalophis may have its relationships with Leptodeiraand Hypsiglena...
William E. Duellman 「Systematic Status of the Colubrid Snake, Leptodeira discolor Gunther」
...Little masonry now remains on this site, but here and there afragment aids in defining the general plan of the pueblo...
Victor Mindeleff and Cosmos Mindeleff 「A Study of Pueblo Architecture: Tusayan and Cibola」
...I havepropounded Nietzsche's general Art doctrine, and, with the view ofillustrating it and of defining it further, I have also applied itsleading principles to one of the main branches of Art...
Anthony M. Ludovici 「Nietzsche and Art」
... can the criticemploy them without defining the particular sense in which he wishesthem to be understood?...
Anthony M. Ludovici 「Nietzsche and Art」
...I thinkProfessor Clifford was very happy in defining science as organizedcommon-sense...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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