MURIDS. 
121 
d. Castorina. 
l^-C. Canadensis, Kuhi. 
r am. Lithog. t. Buff on, 
V H . N. viii. Brit. Zool. t. 
/ a. Black. 
b. Brown ; adult. North America. 
c. Young. North America. 
d. Brown ; adult. North America. 
The Coypu or Racoonda. Myopotamus Coypus, L Geoff \ 
Mus Coypus, Molini. M. Castoroides, Burrows . Pota- 
mys Coypou, Desm . M. Bonariensis, Commerson—'l 
Castor Huidobrinus, Molini. 
a. Adult ; tail nearly bald. Central America. — Presented 
by John Edward Gray, Esq. 
b. Young; tail with scattered bristles. Chili. — Presented 
by Sir William Burnett and Capt. Fitzroy, R.N. 
The Ondatra. Fiber zibethicus, Desm . Castor zibe- 
thicus, Linn. Ondatra Americanus, Tiedem. 
a. b. c. North America. Hudson’s Bay Company. 
The Hydromys. Hydromys chrysogaster, Geoff. Ann . 
Mus. vi. 81. t. 36. f. A. H. leucogaster, Geoff. 1. c. f. 
B. C. D. H. fulvogaster, Jourd. 
a. and d. Dark, belly golden red. Van Diemen’s Land. 
— From Mr. Gould’s Collection. 
Hyd. fulvogaster, Jourdan . 
e. Young; dark, belly golden red. Van Diemen’s Land. 
— From Mr. Gould’s Collection. 
f. Back dark, beneath grey brown, tip of the tail white. 
Western Australia. — From Mr. Gould’s Collection. 
g. Back pale, beneath yellowish grey, tail end w 7 hite. 
New Holland, Liverpool Plains. — From Mr. Gould’s 
Collection. 
h. Back dark, belly grey white, tail end white. Van 
Diemen’s Land. — From Mr. Gould's Collection. 
Hyd. leucogaster, Geoff. Ann. Mus. vi. 81. t. 36. L 
B. C. D. 
G 
