© 
99. CONTIA. 269 
shields short and in contact with three or four labials ; second pair 
very small. Scales in 17 rows. Ventrals 110-137; anal divided ; 
subcaudals 23-40. Grey or pale brown above, with dark brown 
(sometimes light-edged) spots or cross bands, or with a series of 
small dark spots forming a vertebral stripe, which may be accom- 
panied by another more or less distinct stripe along each side ; 
upper surface of head speckled with dark brown, sometimes with 
symmetrical markings; belly yellowish or red, uniform or with 
blackish dots or square black spots. 
Total length 290 millim.; tail 50. 
Mexico. 
A. Internasals distinct. 
a-e, 3 _(V.123; C.36) & La Cumbre de los Dr.A.C. Buller [C.]. 
O-1(V. 187, 138; 7135, Arrastrados, Tal- 
1283 Cs 20). .alee2s} pa Mascota, Ja- 
28). lisco. 
f-g. Yg. (V. 185, 122; Puebla. Paris Museum [E.]}. 
C. 30, 26). 
h-l. 2 (V. 129,133,181; S. Mexico. Mr. H. H. Smith(C.]. 
C. 30, 30, 31) & yg. F. D. Godman, Esq. 
(V. 125; ©. 29). 
; (eal 
m. & (V. 181; C. 35). Mexico. 
B. Internasal distinct on one side, fused with the prefrontal 
on the other. 
n-o. Yo. (V. 128, 122; C. La Cumbre de los Dr. A. C. Buller [C.]. 
27, 39). Arrastrados. 
C. Internasals fused with the prefrontals. 
p-r. & (V. 128, 125; C. La Cumbre de los Dr. A. C. Buller [C.]. 
38, 37) & Q (V. 133; Arrastrados. 
C, 29). : 
sw. d (V. 115,119; C. Omilteme, Guerrero. Mr. H. H. Smith [C.]. 
33, 36), Q@ (V. 180, F. D. Godman, Esq. 
129; C. 23, 26), & yg. [es 
(V. 129; C. 28). 
Bad OV la2): C..36): Milpas, Durango. Hr. A. Forrer. 
y-S. 3 (V. 181, 128; C. Mexico. M.Sallé[C.]. (Types.) 
40, 39) & 9 (V. 129, 
128, 1380, 1382; C. 31, 
», 33, 33). 
€ -GiVe Tals Cy 35). California (?). Mr. Bridges [C.]. 
Toluca lineata, Kennicott, U.S. Mex. Bound. Surv. ii. Rept. 
p- 23, pl. xxi. fig. 2 (1859), and Rep. U.S. Explor. R. R. x. pt. iii. 
pl. xxxv. fig. 8 (1859),= Oxyrhina (Achirhina) defilippii, Jan, 
Arch. Zool. Anat. Phys. ii. 1862, p. 61, are based on what are, in 
all probability, anomalous specimens of C. nasus, in which the 
frontal shield is so produced anteriorly as to separate the pra- 
frontals. . 
