MAMMALIA, 
7 
42. Fiber zibethicus. The musquash. (F. B. A. No.34.) # 
43. Arvicola rubricatus. Red-sided meadow-mouse. 
CH. sp. Arvicola RUBRICATUS, supra obscure plumbeus: subtus pallide cinereus , lateribus miniatis , Cauda 
breviuscula, pollice minimo. 
Sp. Ch. Red-sided meadow-mouse, back slate-coloured, belly ash-coloured, sides nearly scarlet, tail rather 
short ; thumb of fore-foot rudimentary. — Size, a little greater than that of the common domestic mouse. 
The above are the characters of a meadow-mouse, which burrows in the turfy soil on the shores of 
Behring’s Straits, drawn up from Mr. Collie’s notes. In the colours of its fur, and dimensions, it 
most resembles the arvicola ceconomus (Pall. glir. No. 125, pi. 14, A), and appears to be quite dis- 
tinct from any American meadow-mouse hitherto described. There is no specimen in the Collection. 
44. Neotoma Drummondii. Rocky mountain neotoma. (F. B. A. No. 44.) 
Near the sources of the Columbia. 
45. Mus leucopus. American field-mouse. (F. B. A. No. 45.) 
Banks of the Columbia, and New Caledonia. 
46. Arctomys caligata (Eschscholtz). Tarpogan.t 
Arctomys caligata. (ESCHSCHOLTZ, Zool. Atl. pi, vi.) 
Ch. sp. Arctomys caligata, ex griseo alboque nigrescens , capite supra cauddque decem-pollicari ferruguineis, tarsis 
nigris, ore albo, auriculis rotundatis bremusculis. 
Sp. CH. Tarpogan Marmot, hoary, top of the head and the ten-inch tail rust-coloured, feet black, muzzle white, 
roundish and rather short ears. 
description. 
Fur of two kinds, a fine wool, and longer stiff hairs; the former two inches long on the back and 
sides, where it is blackish-brown towards the bottom, and whitish-grey upwards; it is almost 
deficient on the belly. The hairs, white, with black tips, are longest on the neck, being 2| inches, 
while on the belly they measure only half an inch. The top of the head is brown, sprinkled with 
black hairs; a black stripe passes behind the ear from the side of the head to the shoulder; hairs of 
the forehead white; medial line of the nose dark -brown, its tip aud the lips quite white. Ears brown. 
Extremities brown ; the tarsi, soles and toes, covered with moderately long black hairs. Hairs of the 
tail rusty brown, with a wide white ring towards their tips. The black claws equal the toes in length; 
the thumb tubercle of the fore-foot is very evident. Total length of the animal almost two feet, tail 
included. 
47. Arctomys brachyurus. Short-tailed marmot. (F. B. A. No. 49.) 
Plains of the Columbia. 
48. Arctomys (Spermophilus) Parryi. Parry’s marmot. (F. B. A. No. 50.) 
New Caledonia to Icy Cape. The skins are made into dresses by the Esquimaux of Behring’s 
Straits. 
* No. 42. Mr. Collie states that the kidneys of this animal are surmounted by a renal gland about the size of a pea. 
The coecum is wide, sacculated, and nearly a foot long, and the colon , at its commencement, is twisted several times round 
itself. 
t As no English account of this marmot has hitherto appeared, the following description is abridged from 
Eschscholtz’s. There is a great resemblance between the Tarpogan and the Whistler of the Rocky Mountains ( Arctomys 
pruinosus ), noticed in the Fauna Bor eali- Americana, 
