316 peroqnathus. heteromys. 



Spiny Pocket Mouse. 



Type locality. Twenty-five miles below the Needles, Colorado 

 River, San Bernardino County, California. 



Geogr. Distr. Southern California, and northern Lower California 

 Mexico. 



a. PeTo^nathus spinatus peninsiilcB Merriam. 



Perognathus spinatus peninsulcB Merr., Proc. Cal. Acad. Scien., 

 2d Ser., IV, 1894, p. 460. Elliot, Mamm. Middle Amer. & W. 

 Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 363. Zool. Ser. 

 Cape St. Lucas Pocket Mouse. 



Type locality. San Jose del Cabo, Lower California, Mexico. 

 Geogr. Distr. Cape region of Lower California. 



h. Perognathus spinatus hryanti (Merriam) . 



Perognathus bryanti Merr., Proc. Cal. Acad. Scien., 2d Ser., iv, 



1894, p. 458. 

 Perognathus spinatus bryanti Elliot, Mamm. Middle Amer. & W. 

 Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 364. Zool. Ser. 

 Bryant's Pocket Mouse. 



Type locality. San Jos^ Island, Lower California, Mexico. 

 Geogr. Distr. Known only from the type locality. 



779. Perognathus margaritae Merriam, 



Perognathus margaritcn Merr., Proc. Cal. Acad. Scien., 2d Ser., iv, 

 1894, p. 459. Elliot, Mamm. Middle Amer. & W. Indies, 

 F. C. M. Pub., IV, Pt. I, 1904, p. 363. Zool. Sen 

 Margarita Pocket Mouse. 



Type locality. Santa Margarita Island, Lower California, Mexico. 



Geogr. Distr. Known only from the type locality. 



Genus 99. Heteroiuys. S])iiiy Pouched Rats. 



Heteromys Desm., Nouv. Diet. Hist. Nat. Mamm., 1817, p. 313. 

 Type Mtts anomalus Thompson. 

 Dasynotus Wagl., Nat. Syst. Amphib., 1830, p. 21. 

 Saccomys F. Cuv., M^m. Mus. Hist. Nat. Paris, x, 1823, p. 419. 

 Xylomys Merr., Proc. Biol. Soc. Wash., xv, 1902, p. 43. 

 Liomys Merr., Proc. Biol. Soc. Wash., xv, 1902, p. 44. 



Subgenus A, Heteromys. 



780. Heteromys irroratus Gray. 



Heteromys irroratus Gray, Proc. Zool. Soc, 1868, p. 205. Elliot, 

 Mamm. Middle Amer. & W. Indies, F. C. M. Pub., iv, Pt. i, 

 1904, p. 369. Zool. Ser. 



