182 MURIDZ.—CASTOR. 
Lumbar vertebre...........-5- 7 
SAGCral. ge eis caeuk inne og uonsacaed 4 
Catidal (iio iki dis cea oe 4 20 
*q, Skull. Bolivia—The specimen figured in ) 
Waterhouse, Nat. Hist. Mamm. 
*6, Skull. Bolivia. 
*e, Skull. Chili. 
d. Skeleton. 
e. Skull. From Mr. Stevens’s sale-rooms. 
From Mr. Bridges’ 
{ Collection. 
The Macrttanic Crenomys. Ctenomys magellanicus. 
Waterhouse, Nat. Hist. Mamm. ii. p. 283. pl. 8. fig. 5 (skull). 
a. Skull. Purchased of Mr. Bridges. 
The Botrvian Crenouys. Ctenomys boliviensis. 
Waterhouse, Nat. Hist. Mamm. ii. p. 278. 
*a. Skull. Santa Cruz. Purchased of Mr. Bridges.—The specimen 
described by Mr. Waterhouse. 
*b, Skull (smaller). 
The Wutre-Tootaep Crenomys. Ctenomys leucodon. 
Waterhouse, Nat. Hist. Mamm, ii. p. 281. 
a, b, Skulls. Bolivia. Purchased of Mr. Bridges,—The specimens 
described by Mr. Waterhouse. 
c. Skeleton. Bolivia. From Mr. Bridges’ Collection. 
CASTOR. 
. + ll . — 
Teeth :—Incisors qq; Molars a ;= 20. 
The Braver. Castor canadensis. 
Baird, Mamm. N. America, p. 355. pl. 47. fig. 1 (skull), 1859.— Owen, 
Catal. Osteol. Ser. Roy. faath Surg. 1855, ii. B. d. 45, p. 163. 
Castor fiber canadensis, Blainr., Ost. G. Castor, pl. 2 (skull). 
Castor americanus, Brandt, Mém. Acad. St. Pétersb. vii. p. 64, taf. 1. 
fig. 2, taf. 2. figs. 6, 7 (skull), taf. 3, 4 (skull). 
Cervical vertebre.............. v4 
Dorsal. 2 ya scsacke cane oa wate oe 14 
Jimbar 1 sacans aut eens 5 
DaCralAcauamad Marae cn: ons ae 4 
Caudal ect aes shvsitwor terete co 25 
a. Lower jaw, right side. 
b. Slcull (from a black variety). Hudson’s Bay. Presented by the 
Hnudson’s Bay Company. 
