MURIDX.—ARCTOMYS. 219 
The Corumpran Grounp Squrrret. Spermophilus douglasii. 
Baird, Mamm. N. America, p. 309, pl. 45. fig. 1 (skull), 1859. 
Hazpris’s Squrrret. Spermophilus harrisii. 
Baird, Mamm. N. America, p. 318. pl. 47. fig. 3 (skull), 1859. 
The Soustrx. Spermophilus concolor. 
Cuv., Oss. Foss. v. p. 29. pl. 1. fig. 25 (teeth).— Owen, Odont. pl. 105. 
fig. 3 (a, young—b, old molars).—Blasius, Faun. Wirb. Deutschl. 
p. 275. fig. 155 (skull), 1857. 
Mus citillus, F. Cuv., Dents des Mamm. p. 160. no. 55 ae 
, 
1825.—Pallas, Nov. Spec. Glires, tab. 26. fig. 9 a, 6 (ossium penis), 
tab. 27. fig. ix. 11* (skull), 1778. 
Arctomys citillus, Blainv., Ostéog. G. Arctomys, pl. (skull). 
Arca) citillus, F. Cuv., Mém. du Mus. ix. p. 293. pl. 15. figs. 1, 2 
8 ‘ 
a, 6. *Skulls. Moldavia. 
Spermophilus eversmanni. 
a, 6. *Skulls. Altai Mountains. 
The Serx-Szex. Spermophilus parryii. 
*q,. Skull. N. America. Presented by J. Rae, Esq. 
*b, Skull. N. America. Presented by Sir G. Back. 
c, d. Skeletons (imperfect), N. America. Presented by J. Rae, Esq. 
Frangzin’s Marmor. Spermophilus franklinii. 
*qa, Skull. 
CYNOMYS. 
The Missouri Prarrre Doc. Cynomys Iudovicianus. 
Baird, Mamm. N. America, p. 831. pl. 47. fig. 2 (skull), 1859. 
The SHort-TAILED Prarrre Doe. Cynomys gunnisonii. 
Baird, Mamm. N. America, p. 335. pl. 47. fig. 4 (skull). 
ARCTOMYS. 
Teeth :—Incisors =+; Molars =*;=22. 
The Queszc Marmot or WeEnusx. Arctomys empetra. 
Arctomys monax, Gimel., Syst. Nat. i. p. 142, 1788.—Baird, Mamm. 
N. America, p. 339. pl. 49. fig. 1 (skull), 1859. 
Cervical vertebrae. . 
Dorsal: cscacaacvays 
