ONYCHOMYS. PEROMYSCUS. 1.15 



lo ; length of upper tooth row, 4 ; length of mandible, 1 5 ; length of lower 

 tooth row, 4. 



Genus 60. PeroiuyscuK. 



Peromyscus Gloger, Hand- u. Hilfsb. Naturg., i, 1841, pp. xxx, 95. 

 Type Peromyscus arhoreus Gloger = Mus sylvaticus novehora- 

 censis Fischer. 



Ca/ow>'5 Aud. & Bach., Quad. N. Am., II, i85i,p. 303. (nee Water- 

 house, 1837.) 



Sitomys Fitzin., Sitzungsb. Math. -Nat. CI. K. Akad. Wiss. Wien, 

 LVi, 1867, p. 97. 



*Vesperimus Coues, Proc. Acad. Nat. Scien. Phil., 1874, p. 178. 



Baiomys True, Proc. U. S. Nat. Mus., xvi, 1894, p. 758. 



Trinodontomys Rhoads, Proc. Acad. Nat. Scien. Phil., 1894, p. 



257- 

 Haplomylomys Osgood, Proc. Biol. Soc. Wash., xvii, 1904, p. 53. 



Subgenus A. Baiomys. 



"Size very small. Ascending ramus of mandible short and erect. 

 Condyle terminal coronoid process well developed, uncinate, and near 

 condyle. Plantar tubercles six; soles hairy. Tail short." 



264. Peromyscus taylori (Thomas). 



Hesperomys taylori Thomas, Ann. Mag. Nat. Hist., 5th Ser., xix, 



1887, p. 66. 

 Peromyscus taylori Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1901, p. 141. Zool. Ser. 

 Taylor's Mouse. 



Type locality. San Diego, Duval County, Texas. 

 Geogr. Distr. Southern Texas. 



265. Peromyscus allex Osgood. 



Peromyscus allex Osgood, Proc. Biol. Soc. Wash., xvii, 1904, p. 



76. Elliot, Mamm. Middle Amer. & W. Indies, F. C. M. Pub., 



IV, Pt. I, 1904, p. 175. Zool. Ser. 

 Dwarf Mouse. 



Type locality. Colima, State of Colima, Mexico. 

 Geogr. Distr. Unknown. 



266. Peromyscus muscuius (Merriam). 



Sitomys muscuius Merr., Proc. Biol. Soc. Wash., viii, 1892, p. 170. 

 *A subgenus of Hesperomys Coues. (nee Waterhouse.) 



