. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. â iMf '7. \m^, i :' 1 1 = i J^ 330 MONOGRArnS OF NORTH AMERICAN KODENTIA. tlie noil hern parts of tlie United States, and more closely resemble them than do tlie specimens from Georgia and Florida. A series of twenty-one sjx'cimcns from Southeastern Mexico and Yucatan (Orizaba, Tehuantepec, and Mirador, Mexico, and , Yucatan) presents but slight differences from those from the Atlantic States. The difference consists chiefly in the rufous tinge being ratiier stronger in the Mexican sp
. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. â iMf '7. \m^, i :' 1 1 = i J^ 330 MONOGRArnS OF NORTH AMERICAN KODENTIA. tlie noil hern parts of tlie United States, and more closely resemble them than do tlie specimens from Georgia and Florida. A series of twenty-one sjx'cimcns from Southeastern Mexico and Yucatan (Orizaba, Tehuantepec, and Mirador, Mexico, and , Yucatan) presents but slight differences from those from the Atlantic States. The difference consists chiefly in the rufous tinge being ratiier stronger in the Mexican specimens, which is seen especially in the brighter color of the legs and feet. Yet specimens from Tehuantepec and Orizaba can be almost exactly matciied by specimens from the vicinity of Washington. The Mexican specimens are fully as large as specimens from the Atlantic States; the seven skulls from Tehuantepec (all of which are, however, very old specimens), of whieh measurements are given ill Tabic , average rather larger than those from the United State Specimens No. 136 (from ilississippi) and No. 11439 (from Merida, Yucatan) arc as near in color in every respect as two specimens from the same locality can be expected to be. A specimen from the plains of Chihuahua is smaller and rather paler, more nearly approaching variety nuttalli than variety syivaticus. Southern specimens generally have the ears less covered than northern ones, the feet less heavily furred, and the general pelage harsher and less full. Southern specimens also show a tendency to decidedly longer ears than northern ones. On the whole, however, this species presents much more than the average stability of character. In the following tables, the measurements pertaining to the general size have been taken from Professor Baird, my own material being essentially the same as his; the measurements of the skulls are, however, all original. ' Var. NUTTALLI. Sage Hare. Variety nuttalli differs from var. si
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Keywords: ., bookcentury1800, bookdecade1870, bookpub, booksubjectpaleontology
