132 PROCEEDINGS OF THE ACADEMY OF 



Canada Rat, Shaw, 1. c. Canada Pouched Eat, Rich., 1. c. Ham- 

 ster du Canada, Desm. 1. c. Canadian, Hamster, Griffith, A. K. v. 

 1827, 235. Pseudostome abourse, Less., Man. 1827, 259. Diplostome 

 bran, D. blanche, Desm., Less., 11. cc. Coffer, Taschenmaus, Schinz, 

 Syn. ii. 1845, 132. Cauffre, French Canadian (whence German 

 "Goffer" and English " Gopher"). Pouched Rat, Sand Rat, Go- 

 pher, Pocket Gopher, Salamander, American Vulgo. 



Diag. 1 Superior incisors bisulcate, with a fine sharp groove 

 along the inner margin, and another much larger bisecting the 

 remaining plane surface. Cheek pouches ample, extending to the 

 shoulders ; hands (including claws) longer than the feet ; tail and 

 feet hairy ; pelage soft, sleek, mole-like. Color dull reddish-brown, 

 beneath muddy or hoary gray, the basal portion of the fur every- 

 where plumbeous ; feet and tail for the most part white or color- 

 less. Varies to a uniform plumbago color. Average dimensions, 

 adult 7-8 inches ; tail 2-3 inches ; fore foot, with longest claw, 

 about 1.50; hind do, 1.25; longest fore claw about 0.75. 



Hab. Valley of the Mississippi, in a broad sense, and some" 

 what beyond to the northward. " Canada." " Oregon. "(???) 



2. Geomys tuza (Ord), Coues. 



Hamster of Georgia, Mitch., N. Y. Med. Eepos. v. 1802, 89 ; Bewick's 



Quad. 1st Am. ed. 1804, 525. 

 Mus tuza, 2 Ord, Guthrie's Geog., 2d Am. ed. ii. 1815, 292. 

 Geomys pinetix, Raf., Am. Month. Mag. ii. 1817, 45 (Georgia). Baird, 



M. N. A. 1857, 380, pi. 22, fig. 3 a-e. 

 Saccophor us? pineti, Fisch., Syn. 1829, 305. 

 Geomys pineti, Le C, these Proceedings, 1852, 159. 

 Pseudostoma floridana, Aud. & Bach., Q. N. A. iii. 1853, 242, pi. 150, 



fig. 1. 

 Geomys des pins, Desm., Mamm. ii. 1822, 314. 

 Southern Pouched Rat, Gopher, Salamander, Vulg. 



Diag. Superior incisors with a main groove dividing the tooth 

 into two unequal portions, the outer obviously the smaller; the 

 inner larger moiety marked by a fine marginal groove, faint, 

 obscure, and perhaps sometimes obsolete. Tail and hind feet in 

 adult life naked or nearly so. Otherwise like G. bursarius. 



Hab. Georgia, Florida, and Alabama. 



1 Detailed descriptions, discussions, and synonymy, and all general 

 matters, are deferred. 



2 N. B. Ord's Mus tuza, 1. c, quoted with a query by Baird, unques- 

 tionably belongs to this species, being based solely on Mitchell's "Hamster 

 of Georgia;" and antedates Rafinesque's name. 



