MICROSOREX. NEOSOREX. 457 







1106. Microsorex hoyi (Baird). 



Sorex hoyi Baird, N. Am. Mamm., 1857, p. 32, pi. xxvni. 



Sorex thompsoni Baird, N. Am. Mamm., 1857, p. 34. 



Microsorex hoyi Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 



1901, p. 377, fig. 71. Zool. Ser. 

 HOY'S SHREW. 



Type locality. Racine, Racine County, Wisconsin. 



Geogr. Distr. Labrador to British Columbia; northern Minnesota 

 and North Dakota. 



1107. Microsorex eximius (Preble). 



Sorex eximius Preble, N. Am. Faun., No. 21, 1901, p. 71. 

 EXTRAORDINARY SHREW. 



Type locality. Tyone'k, Cook Inlet, Alaska. 



Geogr. Distr. Known only from the type locality. 



Genl. Char. Similar to M. hoyi, but larger and paler. Rostrum 

 narrow, elongate; braincase high, compressed anteriorly, elevated 

 above plane of rostrum; palate long, narrow, excavated; fourth uni- 

 cuspid small; first upper incisor, long, slightly decurved. 



Color. Head, back, and sides uniform pearly sepia; under parts 

 pale drab ; tail bicolor. 



Measurements. Total length, 98; tail vertebrae, 31; hind foot, n. 

 Skull: basal length, 15 ; palatal length, 6.5 ; mastoid width, 7.1 ; antor- 

 bital breadth, 4.3. 



1108. Microsorex alriorum (Preble). 



Sorex alnornm Preble, N. Am. Faun., No. 22, 1902, p. 72. 

 KEEWATIN SHREW. 



Type locality. Robinson's Portage, Keewatin, Canada. 



Geogr. Distr. Keewatin, Canada. 



Genl. Char. Larger than M. hoyi. Skull larger. 



Color. Upper parts sepia brown; beneath ashy gray; hind foot 

 dusky above, whitish below, and dusky toward tip. 



Measurements. Total length, 98; tail vertebrae, 35; hind foot, 12. 

 Skull: greatest length, 16.5; width of braincase, 7; length of man- 

 dible, 10. 



Genus 145. Neosorex. Swimming Shrews. 

 Neosorex Baird, N. Am. Mamm., 1857, p. n. Type Neosorex navi- 

 gator Baird. 



1109. Neosorex palustris (Richardson). 



Sorex palustris Rich., Zool. Journ., in, 1828, p. 517. 

 Neosorex palustris Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1901, p. 378, fig. 72. Zool. Ser. 



