. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. 1^ Hi'. logardcil. Tlic mpusiireinonts given hnyond arn taken from the skins, and socni lo indicate n form nearly as large as the S. carolinensis from the South Allantir- and Gulf States; yet, on comparison of specimens, the feet of the Miridii s|ieciinons prove to be much smaller, the head narrower and every way smaller, showing in reality a much smaller animal, not much exceeding in siz(! S. hudsonius. The New Leon specimens, however, are fairly inter- mediate, lacking the fulvous tint of th
. Monographs of North American rodentia [microform]. Rodentia; Paleontology; Rongeurs; Paléontologie. 1^ Hi'. logardcil. Tlic mpusiireinonts given hnyond arn taken from the skins, and socni lo indicate n form nearly as large as the S. carolinensis from the South Allantir- and Gulf States; yet, on comparison of specimens, the feet of the Miridii s|ieciinons prove to be much smaller, the head narrower and every way smaller, showing in reality a much smaller animal, not much exceeding in siz(! S. hudsonius. The New Leon specimens, however, are fairly inter- mediate, lacking the fulvous tint of the sides seen in northern specimens, and in general color and character of the pelage considerably approach the Merida examples. • De [-jaussuro describes 8. carolinensis as a Mexican species, and Tomes gives it as inhabiting Guatemala. De Saussure's description indicates an animal not very different from the northern 8. carolinensis, including the fulvescent sides and centrally rufous tail. The "cauda corpore vix brevior" and the size show the animal is not referable to 8. coUiai. This seems to indicate the extension southward of the habitat of 8. carolinensis throughout Mexico to Yucatan and Guatemala, its range southward being thus coexten- sive with that of Lfpus sylvaticus, L. palusiris, and L. aquaficus. GENERAL KEMARK8 ON 8CIUBU8 CAROLINENSIS AND ITS VARIETIES. Differential characters.—Vars. leucotis and carolinensis cannot of course be trenchantly defined On comparing specimens from New England with others from Florida, representing, of course, the pxtremes of variation, the differences between the two, both in color and size, are very striking; but, in passing southward from Massachusetts to Florida, this wide difTerence is found to be effected by gradual and im])erceptible steps. In New England specimens, a large proportion arc wholly without a central dorsal area of brown; in Penn- sylvania, Ohio, Illinois, and Iowa specimens, it is a pretty constant fe
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