8 
MAMMALIA. 
49. Arctomys (Spermophilus) guttatus.? American souslik. (F. B.A. No.51.) 
Banks of the Columbia, and New Caledonia, on the mountains. 
50. Arctomys(Spermophilus)Beecheyi. Beechey’s marmot. (F.B. A.p.170.)* 
San Francisco, and Monterey in California. 
51. Arctomys(Spermophilus)Douglasii. Douglas’ marmot. (F. B. A.No.54.) 
Banks of the Columbia. 
52. Arctomys (Spermophilus) lateralis. Say’s marmot. (F. B.A. No. 53.) 
Rocky Mountains, near the sources of the Columbia. 
53. Sciurus Hudsonius. The chickaree. (F. B. A. No. 59.) 
New Caledonia, and banks of the Columbia. 
Lewis and Clarke mention a “ large grey squirrel,” which inhabits the oak forests of the Columbia. 
54. Sciurus Colliaii (Richardson). Collie’s squirrel. 
Genus, Sciurus, Auct. Tlalmototli. (Fernandez, Quad. Nov. Hisp. p. 9.?) Ardillito-zorito. Spanish Cali- 
fornians. 
Ch. Sp. Sciurus CoLLI/El, supra cervinus medio dorsi nigrescens ; subter albus,lateribus extremitatibus caudaque elon- 
gata e nigro canescentibus : Tide quando disticha fasciata ; naso umbrino. 
Sp. Ch. Collie’s Squirrel, above of a mixed yellowish-brown and black, darkest on the dorsal line ; below, 
white ; sides, extremities, and long tail, hoary, the latter striped when distichous ; nose umber-brown. 
PLATE I. 
Mr. Collie observed this squirrel, in considerable numbers, sporting on trees at San Bias in Cali- 
fornia, where its vernacular name signifies “ little fox-squirrel.” It feeds on fruits of various kinds. 
Although unwilling to incur the risk of adding to the number of synonyms with which the history 
of this large genus is already overburthened, I do not feel justified in referring it to any of the 
species admitted into recent systematic works, and I have therefore described it as new, naming it in 
compliment to the able and indefatigable naturalist who procured the specimen. Fernandez enume- 
rates five different squirrels which inhabit Mexico. The first, or “ Quauhtechallotl,” ( Sciurus Mexi- 
canus of Hernandez,) has black fur, and seems to be nearly allied to the Sc. capistratus of authors. 
The second, named “ Coztiocotequallin,” from its tawny belly, lives in burrows, and is very probably 
the Arctomys (Spermophilus) Bcecheyi of this list. The third, “ Techallotl,” has an almost naked 
tail, burrows, and is also likely to prove a Spermophile. The fourth, “ Tlalmototli,” agrees, as far as 
the short description of it goes, with the subject of this article ;f but its absolute identity can be 
established only by one who has an opportunity of studying the Mexican and Californian animals in 
their native retreats. The fifth of Fernandez’s squirrels, or the “ Quimiclitpatlan,” is a pteromys. 
The Sciurus Collicei differs from all the varieties of the Sc. cinereus, in the colours of its fur, and the 
smallness of its ears. The Sc. vulpinus is a much larger animal. The Sc. magnicaudatus may be dis- 
tinguished by its lips being black in place of white, and the feet and under surface of its tail ferrugi- 
nous instead of grey. The Sc. grammurus has very coarse fur. 
* No. 50. This marmot was discovered by this expedition, A detailed account of it, and figure, first appeared in 
the Fauna Boreali- Americana. Mr. Collie informs us that it has an epiglottis — a strong bony clavicle — and a large 
curved ctum, 3i inches long, having a diameter three or four times greater than that of the rest of the intestinal tube. 
t “ Quartus Tlalmototli dictus spithamaeus est, caput et oculos habet pro corporis magnitudine maxima, caudam vero 
longam, pilosamque et lineis totius corporis varius est, et quandoque iuclinans in fulvum, castera prascedentibus similis.” 
