MURIDH,—CTENOMYS, 181 
Myodes ceconomus. 
Mus ceconomus, Pallas, Glires, p. 225. pl. 17. fig. 19 (skull), 1778, 
*a. Skull. Russia. From Mr. Brandt’s Collection. 
The Lemmine. Myodes lemmus. 
Mus lemmus, Pallas, Glires, p. 204. tab. 27. fig. xvii. 9 a, B. (skulls), 
fig. xviii. 10 (fore-foot), 1778. 
a, 6. Skulls. From the Zoological Society’s Collection. 
e. Skull. Sweden. 
The Tawny Lemuine. Myodes helvolus. 
*a, *b. Skulls. Hudson’s Bay. Presented by Dr. J. Rae. 
Bacx’s Lemuine. Myodes trimucronatus. 
*a, Skull. Hudson’s Bay. Presented by the Hudson’s Bay Com- 
pany. 
Myodes torquatus. 
*q. Skull. 
*b, *c, Skulls. Presented by Dr. J. Rae; collected during his ex- 
pedition in 1847. 
The Owryax or Greewtanp Lemminc. Lemmus grenlandicus. 
Cervical vertebre.............. 7 
WOrsall. txts tsctelny oedes hs ac these des 13 
Sum Dar? yes es Se ete as Ve Pa oe 6 
SACLAY a scare esmes taigua esas enue 3 
Cad al icc. Mace Pate d eiew awa. 10 
*a, *b, *c. Skulls. Presented by Dr. J. Rae. 
*d, Skull. Hudson’s Bay. Presented by the Hudson’s Bay Com- 
pany. 
e, f. Skeletons. Wellington Channel. Presented by Captain Sir 
Edward Belcher. 
CTENOMYS. 
Teeth :—Incisors = ; Molars $+ ;=20. 
The Brazitian Crenouys. Ctenomys brasiliensis. 
D’ Orb.,Voy. Amér. Mérid, e 17. figs. 2-5 (skull).— Eydous et Gervais, 
Voy. de la Favorite, v. pl. 8. fig. 2 (skull).— Waterhouse, Nat. Hist. 
Mamm. ii. p. 282. pl. 8. fig. 6 (skull). 
Cervical vertebre.............. 7 
DOA. nxn cscettedty Sawn GRAN 12 
