96 
U. S. P. R. R. EXP. AND SURVEYS—47TH PARALLEL. 
No. 37 ; January 18.—Sciurus ; male. 
Measurements. 
Lines. 
Length from point of nose to the insertion of tail. 
From insertion of tail to end of vertebra. 
Of hairy tip. 
From tip of longest nail of fore foot to do. of hind foot, extreme 
stretch... 
Length of ear, measured posteriorly. 
Of space between ears... 
From heel to end of longest nail of hind foot. 
th of head from occipital protub. to end of nose. 
Leiig th of whiskers. 
Space between eyes.. 
Length of hand, including longest nail.... 
Width of tail, spread out:. 
4th toe longest ; weight, 2 lbs. 
No. 38; January 1 .—Female. 
Inches. 
Lines. 
11 
6 
11 
14 
3 
19 
3 
Weight, 2 lbs. 
SCIURUS RICHARDSONII, Bach. 
Richardson’s Squirrel. 
Sciurus richardsonii, Bachman, Pr. Zool. Soc. Lond. VI, 1838, 100.— Ib. Charlesworth’s Mag. N. H. Ill, Aug. 1839, 
385.— 1b. Jour. Ac. N. Sc. Phil. VIII, i, 1839, 64.—Ib. Townsend’s Narrative, 1839, 318. 
Aud. & Bach. N. Am. Quad. I, 1849, 41 ; pi. v. 
Baird, Gen. Rep. Mammals, 1857, 273. 
Sr. Ch. —Size larger than the Hudson’s Bay squirrel. Ears with long hairs, presenting the appearance of tufts. Tail 
shorter than the body. Under surface of feet hairy from heel to metatarsals, then nearly naked. Above, reddish brown, 
varied with annulations of black, lighter on the sides ; beneath, dull white ; a dark line separating colors of sides from belly. 
Tail bushy, sub-cylindrical, dark reddish brown in the centre, entirely of a pure glossy black at tip. The hairs all long and 
coarse. Hairs on the tail generally, (except at tip,) glossy black beyond the rufous portion, and more or less tipped with paler 
rusty. 
Specimens collected at St. Mary’s Mission in 1853.—(No. 3.) 
SCIURUS DOUGLASSII, Bach. 
Oregon Red Squirrel. 
Sciurus douglassii, (“ Gray,”) Bachman, Pr. Zool. Soc. Lond. VI, 1838, 99.— Ib. Jour. Acad. Nat. Sc. Phila. VIII, 
i, 1839, 63.— Ib. Charlesworth’s Mag. N. H. Ill, 1839, 331. —Ib. Townsend’s Narrative, 
1829, 317. 
Wagner, Suppl. Schreb. Saug. Ill, 1843, 177. 
Sciiinz, Syn. Mam. II, 1845, 10. 
(“Bach.”) Aud. & Bach. N. Am. Quad. I, 1849, 370 ; pi. xlviii. 
Baird, Gen. Rep. Mammals, 1857, 275. 
Sciurus suckleyi, Baird, Proc. Acad. Nat. Sc. Phila. VII, April, 1855, 333. 
