. Bulletin - United States National Museum. Science. 370 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. usually white in Onychomys, mixed with fulvous. Tail with a dorsal stripe of drab extending nearly to the end. Young, smoke-gray, vary- ing to mouse-gray with age. Cranial and dental characters.âThe skull (fig. 60a) of this species is heavy and has the supraorbital ridges de- veloped as an appreciable heading. Compared with Onychomys pallescens and (). melanophrys, it is perceptibly narrower. The interpterygoid fossa appears to be slightly longer. Alto- gether the skulls and teeth of these thre
. Bulletin - United States National Museum. Science. 370 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. usually white in Onychomys, mixed with fulvous. Tail with a dorsal stripe of drab extending nearly to the end. Young, smoke-gray, vary- ing to mouse-gray with age. Cranial and dental characters.âThe skull (fig. 60a) of this species is heavy and has the supraorbital ridges de- veloped as an appreciable heading. Compared with Onychomys pallescens and (). melanophrys, it is perceptibly narrower. The interpterygoid fossa appears to be slightly longer. Alto- gether the skulls and teeth of these three forms â longipes (figs. 606 and c), pallescens, and melanophrysâare quite similar, which fact leads to the sup- position that they may ultimately prove to be but geographic races of a common species. The rostrum and nasals of longipes are slightly shorter than in pallescens, the adjoining form on the west. Measun merits <;/' 8 specimens of Onychomys Fig. 60.âOnychomys longipes. a, Skull; b, Lower molars; c, Upper molars. Museum number. 42 a a Locality. Date. Sex and age. 43 4-> â â .5 ° ~.5 0"C g c o g" CO m o o O c a '3 â¢wis o o L893. 77! m. /;/ in mm. mm. 21183 ;i7(KH'. 2183 Fori (lark, Kinney County, Jan. 1 J ad. 173 57 21182 37007 2232 do .Ian. 17 Jad. 168 58 1892. 21180 37003 37004 2173 2177 .do Dec. l".» Dec. 31 J1 ad. ? ad. 167 163 55 53 11.:. 21185 do 21179 37005 2176 do Dec. :«> S juv. 156 51 21194 2275 do Feb. ii f im. 161 55 21184 â¢_>179 2178 do Dec. 31 .... 9 juv. 9 juv. 141 141 50 21181 do 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 : S
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