30. PHYLLORHYNCHUS 693 



two series. The eye is large, with vertical pupil. Palatine 

 teeth are present. Maxillary dentition is dicranterian. 



Two species are known. They may be recognized by 

 the following: 



SYNOPSIS OF SPECIES 



a. Scales keeled on posterior two-thirds of body ; tail one- 

 eighth total length; about 13 to 46 dark spots between 

 head and tip of tail; no lateral spots. 



P. browni. p. 693. 



a'. Scales all smooth; tail about one-eleventh total length} 

 about 23 to 48 dark spots between head and tip of tail; 

 one or two rows of lateral spots. 



P. decurtatus. p. 695. 



153. Phyllorhynchus browni Stejneger 

 BROWN'S LEAF-NOSED SNAKE 



Phyllorhynchus browni STEJNEGER, Proc. U. S. Nat. Mus., Vol. XIII, 



1890, p. 152, fig. (type locality, Tucson, Arizona); COPE, Proc. 



U. S. Nat. Mus., Vol. XIV, 1892, p. 618; COPE, Report U. S. Nat. 



Mus. for 1898, 1900, p. 821, fig. 184; BROWN, Proc. Acad. Nat. 



Sci. Phila., 1901, p. 64; DITMARS, Reptile Book, 1907, p. 293, 



VAN DENBURGH & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3; 



I 9 I 3> P- 393; STEJNEGER & BARBOUR, Check List N. Amer. Amph. 



Rept., 1917, p. 81. 

 Lytorhynchus browni BOULENGER, Cat. Snakes Brit. Mus., Vol. I, 1893, 



p. 417. 



Description. Head short, rather high, little distinct 

 from neck. Temporal regions not swollen. Rostral very 

 prominent, broad, with free lateral edges, recurved on top 

 of snout, completely separating internasals, and partially 

 prefrontals, bounded behind by prefrontal, internasal, nasal, 

 and first labial plates. Frontal and parietals rather short. 

 Supraoculars comparatively small. Anterior and posterior 

 nasals distinct. Nostril overhung by prominent lower edge 



