96 U. S. p. K. R. EXP. AND SURVEYS — 47TH PARALLEL. 
No. 37 ; January 18. — Sciurus ; male. 
Measurements. 
Length from point of nose to the insertion of tail 
From insertion of tail to end of vertebrte 
Of hairy tip 
From tip of longest nail of fore foot to do. of hind foot, extreme 
stretcli 
Length of ear, measured posteriorly 
Of space between ears. 
From heel to end of longest nail of h'nd foot 
Length of head from occipital protub. to end of nose 
Length of whiskers 
Space between eyes 
Length of hand, including longest nail 
Widtli of tail, spread out: 
4th toe longest ; weight, 2 lbs. 
Inc 
Lines. 
No. 38 ; January 15. — Female. 
Lines. 
From point of nose to insertion of tail 11 G 
From insertion of tail to end of vertebrte 
From same to end of hair 14 3 
Extreme stretch 
Weight, 2 lbs. 
SCIUEUS RICHARDSONIl, Bach. 
Richardson's Squirrel. 
Sciurxis richardsonii, Bachman, Pr. Zool. Soc. Lond. VI, 1838, 100. — Ib. Charles worth's Mag. N. H. Ill, Aug. 1839, 
385.— Ib. Jour. Ac. N. Sc. Phil. VIII, i, 1839, 64.— Ib. Townsend's Narrative, 1839, 318. 
AuD. & Bach. N. Am. Quad. I, 1849, 41 ; p . 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.) 
SCIUEUS DOUaLASSII, Bach. 
Oregon Red Squirrel. 
Sciurus doiiglmsii, (" 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. 
ScHiNZ, Syn. Mam. II, 1845, 10. 
(" Bach.") Aud. & Bach. N. Am. Quad. I, 1849, 370 ; pi. xlviii. 
Baird, Gen. Rep. Mammals, 1857, 275. 
Sciurus suckteyi, Baird, Proc. Acad. Nat. So. Phila. Vlt, April, 1855, .333. 
