96 U. S. P. R. 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 vertebra 



Of hairy tip 



From tip of longest nail of fore foot to do. of hind foot, extreme 



stretch 



Length of oar, 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 



Length of whiskers 



Space between eyes 



Length of hand, including longest nail 



Width of tail, spread out 



4th toe longest ; weight, 2 Ibs. 



Inches. 



11 

 10 

 14 



20 

 I 



1 

 3 

 3 

 3 



1 

 1 



7 



Lines. 



No. 38 ; January 1 . Female. 



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. IB. 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. 

 BAIR.D, Gen. Rep. Mammals, 1837, 273. 



Sn. CH. Size lirger 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 cnntre, 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, (&quot; GRAY,&quot;) 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. Sa ug. Ill, 1843, 177. 

 SCHINZ, Syn. Mam. II, 1845, 10. 



(&quot; BACH.&quot;) AUD. & BACH. N. Am. Quad. I, 1849, 370 ; pi. xlviii. 

 BAIRD, Gen. Rep. Mammals, 1857, 275. 

 Sciurus swkleyi, BAIRD, Proc. Acad. Nat. Sc. Phila. VII, April, 1855, 333. 



