PERODIPUS. 61 



Dipodomys montanus Baird. 



Proo. Aciitl. Nat. Sci. Phila. , VII, p. 334, this paper reported favorably for publi- 

 cation, April 24, 1S55. 

 = Perodipus montanus (Baird). See Merriam, Proc. Biol. Soc. Wash., XVII, pp. 

 140-141, July 14, 1904. 



AVt- iSkin and skull. Collected ou Pacitic Railroad Survey, near 

 38 hit., under Lieut. E. (t. Beckwitli, U. S. A., b}^ Mr. Kreutz- 

 feld in 1853. It wa.s taken in the Rio Grande Valley, near Fort 

 Massaohusett.-;, then in New Mexico, at lat. 37^ 32', long. 105^ 23', 

 now near the present town of Garland, Costilla County, Colorado. 

 Catalooued February 16, 1855. 



Skin badly made up, but well-preserved ; skull with most of the posterior 

 portions of the brain-case broken away ; angular processes of mandible chipped. 



Type not designated by number in the original description, but in Baird's 

 Mammals of North America, page 412, a footnote speaks of No. 490 as the type. 



Perodipus morroensis Merriam. Biological Survey collection. 



Proc. Biol. Soc. AVash., XX, pp. 78-79, July 22, 1907. 



lills' 'Skin and skull. Adult female. Morro, San Luis Obispo 

 County, California. November 11, 1801. Collected by E. W. 

 Nelson. Original number 1461. 



Well-made skin in good condition; skull perfect. 



Perodipus panamintinus Merriam. Biological Survey collection. 



Proc. Biol. Soc. Wa.«h., IX, p. 114, June 21, 1894. 



IMfo- ^kin and skull. Adult male. Head of Willow Creek, Pana- 

 mint Mountains, California. May 12, 1891. Collected by E. W. 

 Nelson. Original numljcr 853. 



Well-made skin in good condition; skull perfect. 



Perodipus simulans peninsularis Merriam. Biological Survey coll. 

 Proc. Biol. Soc. Wash., XX, p. 79, July 22, 1907. 



139872. Skin and skull. Yoimg adult male. Santo Domingo, Lower 

 California, Mexico. September 27, I'.t05. Collected by E. W. 

 Nelson and E. A. Goldman. Original number 18215. 



Well-made akin in good condition; skull perfect, except for absence of 

 lachrymals. 



Perodipus perplexus Merriam. Biological Survey collection. 



Proc. Biol. Soc. Wash., XX, p. 79, .July 22, 1907. 



ff If ^. Skin and skull. Adult male. Walker Basin, Kern County, 

 California. July 15, 1891. Collected by V. Bailey. Original 

 number 3053. 



W^ell-made skin in good condition; skull perfect, except broken lower incisors 

 and slight injuries to palate and basioccipital. 



