184 MURID..——HYDROMYS, 
° a ton. | Chili. Purchased of Mr. Bridges. 
f,g. Skulls. From Mr. Yarrell’s Collection. 
‘h. Skull. From the Zoological Society’s Collection. 
CERCOMYS. 
The Cercomys. Cercomys cunicularius. 
F.Cuv., Mamm. iii. pl. 60; Nouv. Ann. du Mus. i. p. 449. pl. 18. fig. 1 
(molar teeth of upper jaw), pl. 19. figs. 1, 2 (skull).— Waterhouse, 
Nat. Ilist. Mamm. ii. p. 305. pl. 16. figs. 2, 2. a (skull), copied from 
F. Cuvier’s figure. 
FIBER. 
Teeth :—Incisors o; Molars = ;=16. 
The Onpatra. Fiber zibethicus. 
Pander und D' Alton, Vergi. Osteol. no. 6. pl. 8a, 6 (skull).— Baird, 
Mamm. N. America, pl. 54. fig. 6265 (teeth), 1859. 
Mus zibeticus, F. Cuv., Dents des Mamm. p. 157. no. 53 (dentition), 
1825. 
Ondatra zibethica, Waterhouse, Mag. Nat. Hist. 1839, 1 594. fig. 70. 
u 
— Brandt, Mém. Acad. St. Pétersb. vii. figs. 9-14 (skull). 
Cervical vertebre.............-. 7 
DOs c555 casa aways eer es 13 
Lumbar ............ cee ae, 3 
Sacral. Gane sad waaay eens 27 
Cadel, saciscece acs ete eeckea al bile weds 6 
*a. Skull (imperfect). North America. 
b,c. Skulls. From the Zoological Society’s Collection. 
d, Skeleton. Purchased of Mr. Brandt. 
HYDROMYS. 
Teeth :—Incisors a ; Molars = : 12) 
The Hypromys. Hydromys chrysogaster. 
Schreb., Séugth. pl. 239 5. fig. (dentition).—Brandt, Mém. Acad. St. 
Pétersb. vii. tab, 11. figs. 1-6 (skull). 
Hydromys flaviventer, Owen, Odont. pl. 105. fig. 18 (right ramus of 
lower jaw). 
"eee leucogaster, F. Cuv., Dents des Mamm. p. 172. no. 63 (den 
ition). 
a, Skull. Australia. 
