410 Firrtp Musrum or Naturat History — Zo6étocy, Vo. XI. 
Part 2. Total length more than 4 inches but less than 5. 
Upper parts approaching sepia brown; under parts ashy, gray or brownish 
ash; tail more than 1.38 in. (35 mm.); 3d unicuspid not smaller than 
4th; hind foot about .47 in. (12 mm.); total length about 4 inches; 
occurs in Illinois and Wisconsin. COMMON SHREW. 
Sorex personatus, p. 411. 
Back about same color as sides; upper parts dark slaty plumbeous; under 
parts slightly paler and washed with ashy; third unicuspid not smaller 
than the fourth, usually slightly larger. The animal appears nearly 
uniform in color, although slightly paler on under parts; a brown 
pelage occurs in which the pelage is everywhere chestnut brown, 
somewhat paler on the under parts; found in Wisconsin and perhaps 
extreme northern Illinois. SMOKY SHREW. Sorex fumeus, p. 415. 
Color of back noticeably different from the sides; back very dark brown; 
sides fulvous brown or buffy brown; under parts ashy plumbeous, more 
or less washed with brownish; third unicuspid usually decidedly larger . 
than the fourth; a brown pelage occurs in summer very similar to 
that of Sorex fumeus,; occurs in Wisconsin but has not been taken in 
Illinois. RICHARDSON’S SHREW. Sorex richardsonii, p. 414. 
SECTION 2. Total length more than 5.25 inches; feet fringed. 
Back blackish seal brown; under parts ashy white; feet 
fringed; occurs within our limits from central Wisconsin 
northward. WATER SHREW OR MARSH SHREW. 
Neosorex palustris, p. 421. 
Foot of Neosorex palustris. 
Subfamily SORICINZ. 
Ends of teeth and crown tubercles colored red; zygomata absent. 
Genus SOREX Linnzus. 
Sorex Linneus, Syst. Nat., X ed., I, 1758, p. 53. Type Sorex araneus 
Linneus. 
Size small; tail more than one-third the total length; external ear 
not entirely concealed by fur; snout pointed; first upper incisor long, 
curved and hook-like; inner sides of canines and incisors without 
secondary cusps; skull delicate; brain case broad; milk dentition not 
functional. 
Dental formula: I. ae Gee ee : 
2-2 o-0 I-I 3-3 
