93 



Generic Characters.'^'Dental formula : i. |:|- ; c. yiy ', pin. x-x '> ^- l-l=ll^= 

 44. Teeth of both jaws, anterior to last premolar (excepting the broad 

 anterior upper incisors), are of nearly equal size, conical, the upper ones 

 with the points rounded off; the lower more compressed, and with the 

 points more acute. The premolars increase in diameter from first to 

 third, though of equal length; the fourth is much larger, and triangular in 

 section. Externally, thefe is a small acute lobe on the anterior edge of each 

 premolar, and on all the molars close to the base of the crown j a similar 

 lobe on the inner edge of the corfesponding teeth of lower jaw. The 

 molars are in close contact ; the teeth of upper jaW anterior to molars are 

 separated by diastemata. Lower incisors nearly equal ; second not larger 

 than the first. The nostrils are near the end of the muzzle, either lateral 

 or superior. The tail is more or less hairy. 



ScAPANus BEEWEEi (Bach.) Jordan. 

 Hairy-Tailed Molb. 



1843. Scalops breweri, Bachman, Proc. Bost. 8oc. Nat. Hist., i, 1841, 41.-" 

 lb., Bost. Journal Nat. Hist., iv., 1843, 32. — Wagner, Weigman's 

 Archiv., 1843, ii, 31.— lb., Suppl. Schreb,, v, 1855, 573.— Aud. & 

 Bach., K A. Quad., ii, 1851, 173, pi. i, xxiv. 

 1867. Scalops {Scapanus) breweri, Baird, Mamm., N. A., 1857, 68. 

 1876. Scapanus breweri, Jordan, Manual Vertebrates, 1876, 25; 2d Ed, 

 1878, 25. 

 Specific Markings. — A specimen in alcohol measured 1,65 inches from 

 tip of nose to occiput, 4 inches tt root of tail; tail 1.05 inches; tail to 

 end of hairs 1.25 inches; length of hand .72 inch; of foot .76; breadth 

 of palm .56 inch. The body is rather more slender than Scalops aquaticus. 

 The head is rather pointed and elongated, owing to the great develop- 

 ment of the muzzle, which projects about one-third of an inch beyond 

 the incisors. The muzzle is depressed, tapering to a rounded truncate 

 tip. There is a broad groove on the under side from the incisors to the 

 bulb of the nose, which is terminal and smooth. The remainder of the 

 muzzle is wrinkled and corrugated. Nostrils open on the sides of the 

 terminal bulb ; they are slightly visible from above, but not from be- 

 neath. The eye is minute and covered with skin; it is a little back of 

 the angle of the mouth, and midway between the tip of the snout and 

 the occiput. There is no external ear; the auditory opening is an oval 

 cavity about one-twelfth of an inch in diameter, situated just above the 

 insertion of the arm. The tail is thick and blunt at the end, entirely 

 and densely covered with rigid hairs about one-sixth of an inch long. 

 The third finger is longest ; the second about the same size, but not as 



