No. 2.] Allen on Mammals from Texas and Mexico. 22$ 



True, this feature forming their most striking external difference 

 from G. busarius, although the blackish frontal region is also in 

 a measure distinctive. 



There are also two specimens, about two-thirds grown, from 

 Corpus Christi, that seem referable to this species. 



The skull of Geomys personatus differs from the skull of G. 

 busarius and G. tuza in being much heavier, with heavier denti- 

 tion ; while of the same length it is broader, the rostral portion 

 being especially thickened. 



26. PerognathllS flavus Baird, One specimen, skin, without 

 skull, Presidio Co., Texas. Provisionally referred to this species. 



27. Perognathus paradoxus spilotus Merriam. 



Perognathus paradoxus spilotus MERRIAM, N. Am, Fauna, No. I, Oct., 1889, 

 p. 25. j 



Two specimens, ? ad., skin with skull, and skin of a young 

 specimen about two-thirds grown, Bee Co,, Texas, April, 1887, 

 J. M. Priour. Also ? ad., skin and skull, Padre Island, Nueces 

 Co., Texas, Feb. 24, 1887, J. M. Priour, 



These specimens were at first presumed to be P. hispidus Baird, 

 but on comparing them with the type of that species, kindly loaned 

 me for this purpose by the authorities of the U. S. National 

 Museum, they prove to have no near relationship with that species. 

 They are therefore provisionally referred to Dr. Merriam's P. 

 paradoxus spilotus, based on specimens from Gainesville, Texas, 

 though presumably different, Bee County and Gainesville being 

 separated by nearly the whole length of the State of Texas, and 

 are, furthermore, in very different faunal districts. The type 

 being in Dr. Merriam's private collection, his absence in the field 

 renders its examination for the present impracticable. Judging 

 from his descriptions, measurements and figures of P. paradoxus 

 and P. paradoxus spilotus, these specimens belong to the same 

 group. While they seem to scarcely differ from the latter in colo- 

 ration, they are much smaller, though two of them are fully adult 

 (the female had evidently suckled young), as shown by the skulls. 

 No. |Y!J measures as follows : 



Measurements (approximate from skin): head and body 91.5 mm. ; tail ver- 

 tebrae, 78.7 ; hind foot, 23 ; ear from crown, 8. 



