. The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California. imens these light rays are few or obso-lete. The plastron is similarly marked. The head, neckand limbs are brown or olive with yellowish or orange mark-ings. Length of carapace 121 Length of plastron 126 Width of carapace 105 Width of plastron 78 Distribution.—This turtle ranges from Indiana, Illinoisand the Mississippi Valley west to the Rocky Mountains andsouthern Arizona. In Arizona it has been col
. The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California. imens these light rays are few or obso-lete. The plastron is similarly marked. The head, neckand limbs are brown or olive with yellowish or orange mark-ings. Length of carapace 121 Length of plastron 126 Width of carapace 105 Width of plastron 78 Distribution.—This turtle ranges from Indiana, Illinoisand the Mississippi Valley west to the Rocky Mountains andsouthern Arizona. In Arizona it has been collected near Fort Lowell andLa Osa, Pima County, and Fairbank, and Ramsey Canyon,Huachuca Mountains, Cochise County. The National Mu-seum has it from the Graham Mountains at 4,600 feet. Genus 54. Gopherus Gofherus Rafinesque, Atlantic Journal, Vol. 1, No. 2, 1832, p. 64- (type, folyfhemus).Xerobates Agassiz, Contr. Nat. Hist. U. S., Vol. 1, 1857, p. 446 (types, folyfhemus and berlandieri). The shell is very broad and high. The plastron is im- 128 129 129 129 134 127 132 132 130 135 106 103 102 111 111 83 84 88 85 86 Or. Taii K^, Cm,. .Acad. Sci., \ X I \ \N D\ \ K(.II I Plate 12+. Tfrraptiif oinala, TortoiseCollected near Kuirl^aiik. Cocliist. .-\ri/. , 11M2. 54. GOPHERVS 987 movably united to the carapace by a broad bridge. There isa ridge along the middle of the alveolar surface of eachside of the upper jaw parallel to the cutting edge, except infront where there is a longitudinal ridge at the internal openings of the nostrils are between the limbs are club-shaped, the fore limbs flattened, withoutwebs. The skin on top of the head is divided into is but one supracaudal plate. Of the three known species one occurs within our genus is but doubtfully distinct from Testudo. •J 228. Gopherus agassizii (Cooper)Desert TortoisePlates 125, 126, and 127 Xerobates agassizii Cooper, Proc. Cal. Ac
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