MAMMALS—-SORICINAE—SOREX COOPERI. oF 
3. Third and fourth upper premolars nearly equal and rather smaller than the two anterior ones. 
SOREX COOPERI. 
Sorex cooperi, Bacuman, J. A. N. Sc. Phil. VII, 1837, 388; pl. xxiv, fig. 7. 
Aun. & Bacu., N. A. Quad. III, 1854, 311, (from preceding.) 
? Amphisorex lesueriit, Duyernoy, Mag. de Zool. 1842, mam. 33, pl. 50. 
Sorex lesueri, WAGNER, Suppl. Schreb. V, 1855, 54, in dark pelage. 
Sp. Cu —Very slender and small. Ears rather large, nearly as long as the adjacent fur. Longest hairs on back about one and 
ahalf lines. Feet slender but moderately long ; tubercles on sole large and distinct ; fore feet contained nearly twice in the 
hinder, which are about ths the length of skull. Width of skull rather less than half its length ; palate more than 3ths 
this length. Tail nearly as long as head and body, well pencilled at the tip. ‘Third upper premolar tooth above equal to 
the fourth. Premolars not imbricated. Anterior upper incisor with an inner lobe in contact with its fellow. 
Color above, light chestnut-brown ; beneath, pale-brownish, or chestnut white. Length, mostly under two inches. Tail, 
14$. Hind foot, 0.46 of an inch. 
Body small and slender; snout elongated, acute, well provided with bristles. Ears large, not 
projecting, however, beyond the fur; well coated with hair on both sides, except around the 
meatus. Feet moderate. Hands contained about one and two-third times in the feet, which 
have the three middle toes lengthened so that the first claw does not reach the penultimate 
articulation of the second toe; and the fifth claw just attains to the penultimate articulation of 
the fourth toe. The soles are very naked, and exhibit a large tubercle on the base of all the 
toes, and another on each side behind these; they are so arranged as to present two on each edge 
of the sole. The tail is moderately stout, cylindrical, somewhat enlarged in the middle, and 
well covered with long hairs lying flat, and forming a decided brush at the end ; including hairs, 
it is about 14 the length of head and body. Fur on the back measuring nearly two lines. 
The prevailing color above is a light chestnut brown ; beneath, brownish white, or very light 
chestnut white, as are the under surface of the tail, and the feet. 
The muzzle is elongated and very slender; the dental formula > +. The anterior 
upper incisor has a well developed basal hook, larger than usual, and coming down to the line 
tangent to the larger hook and the lateral teeth ; this basal or posterior hook, is as large as the 
first two lateral teeth, which are equal, and larger than the next two, which are also equal; the 
fifth is very diminutive. The lower anterior incisor has three lobed serrations. All the teeth 
are chestnut at the tips. 
List of specimens and measurements. 
No. of Locality. Sex. | Head. |Head and) Tail to | Tail to | Fore | Hind |Ear.| Nature of | From whom re- 
speci’n. body. | verteb. jend hairs.| feet. | feet. specimen. ceived. 
21689 | Labrador..-....-.--- Pees ob 1.70 1.56 1.80 25 47 |-...| Alcohol --| Dr. J. Wyman. 
1690 | Waterville, N. Y..---|...-| 79 1.85 1.55 1.70 25 Ee iP 1 eG Coe pe H. Davis-..=.- 
ffs: | Adirondac Mts, N. Y-| Q | 83 2.00 1. 67 1. 83 21 £2) | eooe| SKIN wot R. Clarke ---.- 
1687 | Burlington, Vt-..... soos)! (80 2.05 1.47 1.55 23 50 | 24 | Alcohol --| Z. Thompson. -- 
21692 | Middleboro’, Mass--.|....| 85 1.90 1. 36 RIGS? jaseos OP \esas|aeOs eas J. W. P. Jenks 
adi {1 led |e Ce a SO a 1.90 1.50 1.70 25 46,7 |25--|Aleohol 2. |2--2-° do. 22.555 
tif, | West Northfield, Ill.-|....| 83 1. 83 1. 50 1575 21 45775 -24|SKIN nas] R. Kennicott -- 
2047 oio- 225 dori s22-.- 224 ee age 1. 86 1, 23 1.39 24 BOTS area PAICONOL 22 |52e a= doj: 4234 
fA‘ | Racine, Wisc_..---- Q| 75 1. 06 1.58 1.75 22 22) eae SEIN. = 5 Dr, Hoyss--==- 
{#8 | Fort Ripley, Minn---| Q | 83 1.92 1.50 1.75 22 (Fig Nonel|- aR ee A Dr. J. F. Head. 
1935 | Medicine Bow river, |....| 85 2.05 1.41 1.53 25 45 |.---| Alcohol --| Lt. F. T. Bryan 
Nebraska. & W. S. Wood. 
