. Bulletin - United States National Museum. Science. 242 BULLETIN 58, UNITED STATES NATIONAL MUSEUM. another to record. The carination of the ventrals, gulars, and tem- porals is quite variable, but seems to be strongest in the younger speci- mens; in the one from Sapporo, Yezo (No. 23437), a very large male, even the gulars are smooth. This specimen also has one or two of the central temporals greatly enlarged and smooth. The number of lon- gitudinal rows of dorsals is also subject to considerable variation, the common arrangement being three enlarged series on each side with a single or some
. Bulletin - United States National Museum. Science. 242 BULLETIN 58, UNITED STATES NATIONAL MUSEUM. another to record. The carination of the ventrals, gulars, and tem- porals is quite variable, but seems to be strongest in the younger speci- mens; in the one from Sapporo, Yezo (No. 23437), a very large male, even the gulars are smooth. This specimen also has one or two of the central temporals greatly enlarged and smooth. The number of lon- gitudinal rows of dorsals is also subject to considerable variation, the common arrangement being three enlarged series on each side with a single or sometimes double series of very small keeled scales between the two median rows; these scales in case of a smgle series alternating on the right and left side of the middle line; in a number of specimens, however, there are only two series of very large scales on each side with a double series of smaller ones between them, but in this case the median scales are considerably larger than where there are three large series on each side. There is also considerable variation in the way the rostral, fronto-nasal, and nasals meet (though in most cases the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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