538 TIPBBIDiE. 



Oophias atrox, Merr. Tent. p. 164 (1820). 



Bothrops megeera, Waffl. in Spia,; Serp. Bras. p. 50, pi. xix. (1824). 



tessellatus, Waffl. I. c. p. 54, pi. xxi. fig. 2. 



teniatus, Wagl. I. c. p. 55, pL xxi. fig. 3. 



Craspedocephalus atrox, Fitzing. N. Class. Rept. p. 62 (1826);. 



Wucherer, Proc. Zool. 8oc. 1863, p. 51. 

 Trigonocephalus atrox, ScMeg. Phys. Serp. ii. p. 635, pi. xix. figs. 5' 



& 6 (1837). 

 Craspedocephalus atrox, part.. Gray, Cat. p. 6 (1849). 

 Bothrops affinis. Gray, I. c. p. 7. 

 atrox, part., Dum. ^ Bibr. vii. p. 1507 (1854) ; Giirdh. Biol, 



C.-Am., Jtept. p. 187 (1895). 

 ■ atrox, Jan, Arch.f. Nat. 1859, p. 275 ; A. E. Brown, Proc. Ac, 



Philad. 1893, p. 434. 

 Trigonocephalus asper, Oarm. N. Am. Rept. p. 124 (1883). 



Snout obtusely pointed, with sharp, slightly raised canthus. 

 Eostral as deep as hroad or a little deeper than broad ; nasal 

 divided ; upper head-scales small, imbricate, more or less strongly 

 keeled, in 5 to 9 longitudinal series between the supraoculars, which 

 are large ; a pair of large internasals, forming a suture with each 

 other, and a large canthal ; two postoculars and one, two, or three 

 suboculars, separated from the labisils by one series of scales ; 

 temporal scales keeled ; seven (rarely eight) upper labials, second 

 forming the anterior border of the loreal pit. Scales in 25 to 29 

 rows, strongly keeled, the keels on the posterior part of the back 

 very high, swollen in the middle, and much shorter than the scale, 

 Yentrals 161-216 ; anal entire ; subcaudals 47-73 pairs. Brown 

 above, with more or less distinct dark, light-edged cross-bands 

 or triangles with the apices approximating on the vertebral line ; 

 a more or less distinct dark streak from the eye to the angle of the 

 mouth ; belly yellowish white, much speckled and blotched with 

 brown, or brown spotted with yellowish white. 



Total length 1110 millim. ; tail 180. 



Prom Central America to Peru and Northern Brazil. 



a. Hgr. (So. 25 ; V. 216 ; Cohan, Guatemala. F. Sarg, Esq. [0.]. 



C. 66). 



6.cJ(Sc. 25;V.20,liC.65). Matagalpa, Nicaragua. Dr. E. Rothschuh 



[C.]. 



c. Yg. (Sc. 27 ; V. 197 ; Ohontalez, Nicaragua. R. A. Rix, Esq. [C] ;. 



0. 70). W. M. Crowfoot, 



Esq. [P.]. 



d^e. c? (Sc. 27 ; V. 202 ; Chiriqui. J. G. Champion, Esq, 



C. 72) & yg. (So. 27; [C] ; F. D. Godman, 



V. 195 ; C. 6.5). Esq. [P.]. 



f-g. Yg. (Sc. 29, 27; V. Carthagena, Colombia. Capt. Garth [P.]. 



204, 190 ; C. 62. 69). 



hr-i. Yg. (Sc. 25, 27 ; V. Rosario du Cucuta, Mr. C. Webber [C], 



210, 187 ; C. 77, 64). Colombia. 



k. Yg. (Sc. 27; V. 200; Bogota. O.Laverde,Esq.[P.> 



C. 58). 



l-m. $ (Sc. 26, 27 ; V. 196, W. Ecuador. Mr. Fraaer [0.]. 



195 ; C. 65, 58). 



