

APR. 1903. NEW SPKCIES AND SUBSPECIES OF MAMMALS ELLIOT. 167 



Measurements. Total length, 159; tail vertebrae, 83; hind foot, 

 20.5; ear, 8. Extreme range of fifteen specimens: total length, 

 145-166; tail vertebrae, 76-96; hind foot, 19.5-22; ear, 6-8. 

 Skull: occipito-nasal length, 23; Hensel, 14; zygomatic breadth, 

 11.5; interorbital constriction, 6; mastoid breadth, 11.5; great- 

 est width of brain case, 10.5; palatal arch to alveoli of incisors, 

 8.5; length of nasals, 7.5; width of rostrum, 4; length of upper 

 tooth row, 3. 



The form nearest to P. helleri is probably the one with which I 

 have compared it, P. p. arenarius, so supposed from San Felipe, 

 here reduced to subspecific rank because the series in this col- 

 lection from Lower California shows that P. p. arenarius and 

 P. p. angustirostris from the same locality, San Felipe, run into 

 one another, there being intermediate specimens. The present 

 species and the San Felipe specimens are totally different in color 

 and are separated from each other by the San Pedro Martir 

 mountains 10,000 feet high, as well as the two coast ranges, and 

 Mr. Heller obtained nothing resembling either in the intervening 

 country. P. p. arenarius was only represented, up to this time, 

 so far as I know, by a single specimen, taken in the vicinity of 

 Comondu, seven degrees south of San Felipe, on the eastern side 

 of the Peninsula, and over four degrees south of San Quentin, 

 which is on the west coast. Mr. Heller says the present species 

 was one of the commonest mammals at San Quentin. 



'erognathus baileyi *rudinoris. Subsp. nov. 



Type locality. San Quentin, Lower California, Mexico. 



Geogr. distr. West coast of Lower California, west of San 

 Pedro Martir mountains, in the vicinity of San Quentin. 



Gen. char. Similar to P. baileyi but darker, with very slender 

 nasals, mastoids larger, upper incisors more slender. 



Color. Upper parts and sides pale buff finely lined with black, 

 darkest on head; sides of nose, cheeks and line above eyes pale 

 yellowish buff lined with black; ochraceous lateral line from lips 

 to thighs; under parts pure white; tail above and pencil dark 

 brown, beneath yellowish white; hands and feet grayish white. 



Measurements. Type: total length, 232; tail vertebrae, 128; 

 hind foot, 27; ear, 11.5. Extremes of nine examples: total 

 length, 180-232; tail vertebrae, 101-128; hind foot, 23.5-27; ear, 

 9.5-11.5. Skull: occipito-nasal length, 31; Hensel, 22; zygomatic 



*pvdiyo?, slender; pi?, the nose. 



