162 | SEPTEMBER, 
those above described in being darker colored, and brown above, rather than 
rufous ; the head is darker, the breast is slightly tinged with brown, the chin and 
inside of the cheek pouches more distinctly white, and the sides of the mouth 
dark fuscous. As, however, I can find no specific characters of importance, I am 
obliged to consider it as a variety. Its dimensions are as follows :— 
Length from nose to root of tail, . A 5 . 4 7:25 
é ADAM 4 : . i 1 4 2°9 
Fore foot to end of third claw, 3 4 : : oil 
Hind foot to end of third claw, : 5 4 i 5 1:25 
7, G. Douglasii, “supra fuliginosus, subtus pallidior, capite nigricante ; ; 
sacculis buccalibus, pedibus caudaque albidis ; dentibus primoribus omnibus sulco 
subtili submarginali signatis.”? 
Inches. Lines. 
Length from nose to root of tail, . : fs . 6 6 
&< Tail, : a 4 : 3 . 2 10 
Fore foot with longest claw, ; : : : iL 
Hind foot with longest claw, 5 ‘ a 1 2 
Richardson Fauna Bor. Am. 200, pl. 18, C. 1—6, (Skull.); Aud. and Bachm. 
pl. 105. 
Ascomys Douglasti Wagner, Schreber Satigeth. Suppl. 3, 392. 
Geomys fuliginosus Schinz, Syn. Mam. 2, 136. 
Columbia River. Richardson in his generic description mentions that the ears 
have anelevated margin ; the species is cited in the Zoology of Beechey’s Voyage, 
page 22, but as no further account is given of it, I have of course omitted that re- 
ference. Schinz has created an unnecessary synonym by neglecting to observe 
that plate 18B, of Fauna Boreali-Americana, represents in reality Geomys bulbi- 
vorus, and is lettered by mistake Diplostoma Douglasii. 
8. G. talpoides, ‘‘ supra subtusque cano-niger, gula caudaque brevi albis, 
pedibus posticis subtetradactylis ; dentibus primoribus superioribus sulco sub- 
marginali.”? _ 
Inches. Lines. 
Length from nose'to root of tail, . : : : 7 4 
BS Tail, ° “ 4 ° ° 1 10 
Fore foot with middle claw, : : “ : 10% 
Hind foot with longest claw, - . ° : 11 
Richardson, Fauna Bor. Am. 204; Schinz, Syn. Mam. 137. 
Cricetus ?talpoides Richardson, Zool! Journal, 2, 518. 
Ascomys talpoides Wagner, Schreber Satigeth. ates sk\0e 
Pseudostoma talpoides Aud. and Bach. Quadr. Am. 3, 43, pl. 110. 
Hudson Bay ; Saskatchewan? ‘ Kars slightly margined.” 
9. G.umbrinus, ‘* supra umbrinus, subtus griseus, gula pedibusque albidis, 
dentibus primoribus levigatis.”? 
Inches. Lines. 
Length from nose to root of tail, : 5 7 
ce aan 5 é j 4 5 4 . 1 9 
Fore foot to end of third claw, - . i é 10 
Hind foot to end of third claw, : ° i . 1 
Richardson, Fauna Bor. Am. 202; Schinz, Syn. Mam. 137. 
Ascomys umbrinus Wagner, |. c. 389. 
*‘ Cadadaguios, Louisiana.”? This species has been seen by no one but Rich- 
ardson; it seems by description very similar to the next, but by the generic de- 
scription of Richardson it ought to have a distinct margin to the ears. 
10. G. bul bivorus, “supra inter castaneo et flavido-fuscum intermedius, infra 
griseo-fuscus, labiis, maxilla inferiori sacculisque albidis, cauda pallide brunnea. 
