. Bulletin - United States National Museum. Science. TKiri) LIZATtDS OF THE GENUS CXEMIDOI'IIOKUS 225 iiiL'iit of the leiuk'iicy to possess u tiiicly retieiilatcd or iiiu'Iy .spoUecl pattern. All of these species, but particularly hacatus and catalin- ensis, are separated from the mainland of Lower California and Sonera by greater distances and depths than are ceralhensls and celer^'ipes^ and, as might be expected, the variation from tessellatus is on the whole more striking. The subspecies, canus of Sal Si l*uedes Island and North San Lorenzo Island and martyrls of San Pedro Martir Island, in
. Bulletin - United States National Museum. Science. TKiri) LIZATtDS OF THE GENUS CXEMIDOI'IIOKUS 225 iiiL'iit of the leiuk'iicy to possess u tiiicly retieiilatcd or iiiu'Iy .spoUecl pattern. All of these species, but particularly hacatus and catalin- ensis, are separated from the mainland of Lower California and Sonera by greater distances and depths than are ceralhensls and celer^'ipes^ and, as might be expected, the variation from tessellatus is on the whole more striking. The subspecies, canus of Sal Si l*uedes Island and North San Lorenzo Island and martyrls of San Pedro Martir Island, intergrade with tessellatus throngh the whiptail on Smith Island, to the north of them, and with each other through the form on the geographically intermediate South San Lorenzo Island. The islands on which these p()])ulati<)iis occui' are in a dii'cct line with each other and were no HLMlyxis ceraltensii. tessellatus Ances\r-a\ tessellaius stock . Tnax\mus Ancestral S^ock of the Tesse\ Group FlGUIiE 31. DiAliUAM UF THE SUPPOSED 'S WITUIX THE TESSELLATUS GROUP doubt connected in the post-Miocene (as suggested by Gadow, 1905?>, p. 236, and others) and probably the union continued through the Pliocene and perhaps even into the Pleistocene. The pattern of maHiji-is and canus ditfei-s from that found in a minority of speci- mens of tessellatus only in the iiner degree of its reticulation. This and the existence of the intergrades, mentioned above, makes it obvi- ous that both martyrls and canus have been directly derived from tessellatus. The dwarf sj)ecies, hacatus and catalinensis, are not known to inter- grade with each other or with either martyris or tessellatus. Although hacatus is found on San Pedro Nolasco Island, near the coast of Sonora, and the latter occurs on Santa Catalina Island, near the Lower Californian mainland, the two forms resemble each other. Please note that these images are extracted from scanned page images that may have been digita
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