. Bulletin - United States National Museum. Science. 4 7 Fig. Gi.—Bufo columbiensis halophilus (from Baird, TJ. S. and Mexican Bound Survey); 1, The northern and southern varieties may be thus defined in extreme forms: Head times in leugth; web extending to tips of toes, bnt deeply emargiuate; parotoid gland more elongate; colors dark ; size large B. c, columbiensis. Head 4 times in length ; webs more deeply notched, and leaving tbree phalanges of fourth toe free; parotoid shorter; colors light; size smaller There are, however, as many specimens which are intermediate betwe
. Bulletin - United States National Museum. Science. 4 7 Fig. Gi.—Bufo columbiensis halophilus (from Baird, TJ. S. and Mexican Bound Survey); 1, The northern and southern varieties may be thus defined in extreme forms: Head times in leugth; web extending to tips of toes, bnt deeply emargiuate; parotoid gland more elongate; colors dark ; size large B. c, columbiensis. Head 4 times in length ; webs more deeply notched, and leaving tbree phalanges of fourth toe free; parotoid shorter; colors light; size smaller There are, however, as many specimens which are intermediate between these extremes as there are specimens of the latter. These represent the Bnfo mieroscaplius Co])e. The specimens of the middle and south- ern Rocky Mountain region are referable to it, as well as many from. 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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