30. PHYLLORHYNCHUS 695 
me that two others, males, were taken together at night, 
July 24, 1916, at the San Xavier Mission, near Tucson, 
Arizona. 
154. Phyllorhynchus decurtatus (Cope) 
Lower CaLiroRNIA LEAF-NOSED SNAKE 
Plate 72 
Phimothyra deeurtata Cope, Proc. Acad. Nat. Sci. Phila., 1868, p. 310 
(type locality, the upper part of Lower California); Cope, 
Bull. U. S. Nat. Mus., No. 1, 1875, pp. 38, 92; Yarrow, Bull. 
U. S. Nat. Mus., No. 24, 1883, pp. 15, 99; Betpinc, West Amer. 
Scientist, Vol. III, No. 24, 1887, p. 98. 
Salvadora decurtata GarMAN, Mem. Mus. Compr. Zool., Cambr., Vol. 
VIII, No. 3, 1883, pp. 39, 145; Garman, Bull. Essex Inst., Vol. 
XVI, 1884, p. 25; Core, Bull. U. S. Nat. Mus., No. 32, 1887, p. 
2; Bocourr, Miss. Sci. au Mex., Rept., tte livr., 1888, p. 663. 
Phyllorhynchus decurtatus STEJNEGER, Proc, U. S. Nat. Mus., Vol. XIII, 
1890, p. 154; Cope, Proc. U. S. Nat. Mus., Vol. XIV, 1892, p. 
618; Van Densurcu, Proc. Cal. Acad. Sci., Ser. 2, Vol. 5, 1895, 
p- 145; Cope, Report U. S. Nat. Mus. for 1898, 1900, p. 823, fig. 
186; Brown, Proc. Acad. Nat. Sci. Phila., 1901, p. 64; Dirmars, 
Reptile Book, 1907, p. 293; STEJNEGER & Barsour, Check List 
N. Amer. Amph. Rept., 1917, p. 81; Van Denspurcu & SLEviN, 
Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, pp. 52, 66; NELson, 
Mem. Nat. Acad. Sci., Vol. XVI, 1921, pp. 114, 115; ATSATT, 
Copeia, 1921, No. 96, p. 38; Terron, Mem. y Rev. Soc. Cient. 
Antonio Alzate, Vol. 39, 1921, pp. 164, 170. 
Lytorhynchus decurtatus Boutencer, Cat. Snakes Brit. Mus., Vol. I, 
1893, Pp. 417. 
Description —Head short, not high, little distinct from 
neck. Temporal regions not swollen. Rostral very promi- 
nent, broad, with free lateral edges, recurved on top of 
snout, completely separating internasals, in contact with pre- 
frontals, bounded behind by prefrontal, internasal, anterior 
nasal, and first labial plates. Frontal short. A pair of large 
parietals. Supraoculars comparatively small. Anterior and 
