SORICIDA; —- CLX XXVIII. 320 
b. Fore-feet not enlarged; muzzle Salem external ear developed; appear- 
ance mouse-like. . . . . » SORICIDA, 188. 
bb. Fore feet very broad, with Slant aay adapted f for digging; no external 
CALS eee tall ‘TetWletbiey ee Be. Rene) feed Late t .¢)) DALPIpszy, 189. 
Famity CLXXXVIII SORICIDA). (THE SHReEws.) 
Small Insectivora, mouse-like in appearance, with the eyes and 
external ears developed. Muzzle elongate. Feet normal, not 
fossorial ; the fore-feet mostly smaller than the hind ones. Teeth 
16 020 : poate! obsolete. The most abundant and widely dis- 
Eahited family of the Insectivora, comprising more than half the 
known species, arranged in 8 genera. The number of species of 
Blarina and Sorez is still uncertain, and the geographical distribu- 
tion of the species has been little studied. 
a. Feet very long, with a fringe of hairs; ears valvular (to exclude water) ; 
concha (external ear) directed backwards: tail long; teeth 23 =382. 
NEOSOREX, 5956. 
aa. Feet not fringed. 
6. Ears large, the concha turned backward. . . . + » « SOREX, 507. 
bb. Ears small, not visible externally, the concha directed forwards, so as to 
hide the opening; tail short, not longer than head. . BLARINA, 558. 
556. NEOSOREX Baird. (véw, to swim; Sorex.) 
1063. N. palustris (Richardson). Water Surew. Hoary 
black; belly ashy gray; largest of our shrews. L. 6. T. 23. 
Mass. to Rocky Mts. and N. Aquatic. 
557. SOREX Linneus. (Lat.,a field-mouse.) 
a. Teeth colored, 82 = 23; feet large. (Sorez.) 
b. Third upper premolar larger than fourth. 
1064. S. forsteri (Richardson). Ears small; tail ? length of 
head and body; snout slender. L. 44. T. 13. N. U.S. 8. to 
Penn. (To John Reinhold Forster.) 
1065. S. richardsoni Bachman. Fars rather small; tail scant- 
haired. L.4. T.14. Wis. and N. (To Sir John Teheran y 
1066. S. platyrhinus (DeKay). Common SHRew. SHREW 
Mouss. Ears very large for a Shrew; tail short, scant-haired ; 
color chestnut-brown. L. 33. T. 14. N.U.S., rather common. 
(mAards, broad ; piv, snout.) 
bb. Third upper premolar equal to fourth and smaller than first and second. 
1067. S. cooperi Bachman. Ears large; chestnut brown. L. 39. 
T. 14. Mass. to Neb. and N. (To Dr. J. G. Cooper.) 
1068. S. personatus Geoffroy St. Hilaire. Ears large ; chestnut 
brown. L. 238. T. 1. Smallest of our Shrews ; Penn. and S. 
(Lat., masked.) 
aa. Teeth 30=18; feet small. (Microsorex Baird.) 
