458 CALIFORNIA ACADEMY OF SCIENCES. 



Perognathus bryanti* sp. nov. 



Type from San Jose Island., Lower California. No. 

 Ill (5 ad. Collection of California Academy of Sci- 

 ences. Collected May 2, 1892, by Walter E. Bryant. 

 Original number, 629. 



Measurements (taken in flesh). — Type: Total length, 

 216; tail vertebra?, 127; hind foot, 25. Ear from ante- 

 rior base, 9.5 (in dr}^ skin). 



Average measurements of three specimens from type 

 locality: Total length, 215; tail vertebrce, 124.6; hind 

 foot, 25.3; ear from notch, 11. 



General characters. — Similar to C . spinatiis but much 

 larger, with a much longer and more heavily crested tail; 

 ears longer and darker; whiskers longer and heavier, 

 reaching middle of back; pelage ever3^where coarser and 

 more spiny; rump spines conspicuous as in spiiiatiis. 



Color. — Upper parts drab gray, becom- 

 ing brownish on the back in old pelage, 

 plentifully lined with black hairs; under 

 parts, fore and hind feet and fore legs 

 white; no lateral stripe ; tail bicolor, dusky 

 above, white beneath. 



Cranial characters. — Skull similar to that 

 of sfinatiis but very much larger (total 

 length 27 instead of 23) ; interparietal more 

 Fig 1. p. hrimntx. than twice as broad as long, strap-shaped 

 or very broadly and flatly pentagonal. Compared with 

 C. sfinatus peiiinsiiIcB from the adjacent mainland the 

 skull is narrower and slightly smaller, but the cranial 

 differences are slight. 



General remarks. — C. bryanti is the largest and hand- 



* Named in honor of its collector, Mr. Walter E. Bryant, who has done 

 so much to increase onr knowledge of the fauna of Lower California. 



