Family TALPIDAE 51 



Tail length more than half of head I body length; ears not 



hidden in fur 5 



4. Over-all length of animal less than C8 mm. (3>_> in.) ; fur 



gray-brown in color least shrew, Cryptotis parva 



Over-all length of animal more than 88 mm.; fur blackish 



in color short-tailed shrew, Marina brevicauda 



5.* Upper jaw, in lateral view, with 3 unicuspids visible on 



each side, fig. 44c P'gmy shrew, Microsorex hoyi 



Upper jaw, in lateral view, with 4 or more unicuspids visi- 

 ble on each side, fig. 44^ 6 



6.* Third unicuspid smaller than fourth, fig. 44^ 



southeastern shrew, Sorex longirostris 



Third and fourth unicuspids subequal or third larger than 

 fourth, fig. 44^ masked shrew, Sorex cinercus 



Skulls 



1. Zygomatic arches present, fig. 41 ; teeth not tipped with red 



or brown Talpidae (moles) 2 



Zygomatic arches absent; front teeth tipped with red or 

 brown, fig. AAa-c, e, g Soricidae (shrews) 3 



2. Teeth in upper jaw 20, in lower jaw 16; upper incisors 



slightly recurved, fig. 44/. . eastern mole, Scalopus aquaticus 

 Teeth in upper jaw 22, in lower jaw 22; upper incisors 



• projecting forward, fig. 44</ 



star-nosed mole, Condylura cristata 



3. Teeth in upper jaw 18 least shrew, Cryptotis parva 



Teeth in upper jaw 20 4 



4. Width of skull more than 11 mm. (3/g in.) 



short-tailed shrew, Blarina brevicauda 



Width of skull less than 11 mm. 5 



5. Upper jaw, in lateral view, with 3 unicuspids visible on 



each side, fig. 44c p : gmy shrew, Microsorex hoyi 



Upper jaw, in lateral view, with 4 or more unicuspids visi- 

 ble on each side, fig. 44r, g 6 



6. Third unicuspid smaller than fourth, fig. 44^ 



southeastern shrew, Sorex longirostris 



Third and fourth unicuspids subequal or third larger than 

 fourth, fig. 44<7 masked shrew, Sorex cinereus 



SCALOPUS AQUATICUS (Linnaeus) 



Eastern Mole 



Description. — The eastern mole, fig. 45, has a rather thick 

 body, plushlike fur, short torelimbs, broadly rounded hands 

 with outwardly turned palms, pointed snout, short tail, no ex- 

 ternal ears, and no visible eves. 



*The characters in this couplet are seen best in a cleaned skull, and only with 

 difficulty in a whole animal. 



