11. lACHESIS. 545 



Bothropa mexicanus, F. Mull. Verh. Nat. Ges. Basel, vii. 1882 

 p. 154. ' 



Trigonocephalus affinis, Garm. N. Amer. Bepi. p. 125 (1883). 



ThanatopHis nummifer, Posada- Arango, Bull. Soc. Zool. France 

 1889, p. 343. 



Snout broad, rounded, with, moderately marked cantliua. Eostral 

 as deep as broad or a little broader than deep ; nasal divided, some- 

 times separated from the rostral by a series of small scales ; upper 

 head-scales imbricate, strongly keeled, 7 to 10 in a series between 

 the supraoculars, which are very narrow and sometimes broken up ; 

 no enlarged internasals ; three or four series of scales between the 

 teye and the labials; temporal scales strongly keeled; loreal pit 

 separated from the labials by small scales; 10 or 11 upper labials, 

 fourth and fifth largest. Scales in 28-27 rows, strongly keeled, 

 tuberoularly on the back in the adult. Ventrals 121-134 ; anal 

 entire ; subcaudals 26-36, aU or greater part single. Pale brown 

 above, with a dorsal series of dark brown, black-edged, rhomboidal 

 spots, which may be confluent and form a zigzag band ; a lateral 

 series of dark brown or black spots or vertical bars ; a dark brown 

 streak on the side of the head, from the eye to the angle of the 

 mouth ; whitish beneath, uniform or spotted with dark brown. 



Total length 800 miUim. ; tail 90. 



Mexico and Central America. 



a-c. S (Sc. 25 ; V. 131 ; Mexico. Mr. H. Finck [0.]. 



C. 35), 2 (Sc. 23 ; V. 

 134;0.26),&ligr. (Sc. 

 23; V. 132; 0.32). 



d. Hgr, (Sc. 25 ; V. 128 ; Teapa, Tabasco. F. D. Godman, Esq. 

 C.32). [P.]. 



e. Hgr. (Sc. 25; V. 133; Huatuzco, Vera Cruz. F. D. Godman, Esq. 

 0. 31). [P.]. 



f-i 2 (Sc. 27, 27 ; V. Vera Paz, low forest. 0. Salvin, Esq. [C.]. 



129, 128; C. 33, 32) 



& hgr. (Sc. 25, 27 ; V. 



121, 125 ; C. 35, 33). 

 k-l. 2 (Sc. 27, 26; V. Hacienda, Rosa de Dr. E. Kothschuh 



129, 129; C.32, 30). Jericho, Nicaragua, [0.]. 



3250 ft. 

 m. 5 (Sc. 25 ; V. 130 : Matagalpa, Nicaragua. Dr. E. Eothsohuh 

 . 0.32). [0.]. 



n. 2 (Sc. 25; V. 126; Monte Eedondo, Costa Mr. 0. F. Underwood 



0. 28). Rica. [C.]. 



13. Lachesis godmani. 



Bothriechis godmanni, GUnth. Ann. 8r Mag. N. H. (3) xii. 1863, 

 p. 364, pi. vi. fig. G, and Biol. C.-Am., Bept. p. 190, pi. Ivii. fig. A 

 (1895). 



Bothrops brammianus, Bocourt, Ann. Sc. Nat. (5) x. 1868, p. 201. 



Bothriopsis godmannii. Cope, Froc. Ac. Philad. 1871, p. 208. 



Bothrops (Bothriopsis) godmanii, F. Mull. Verh. Nat. Ges. Basel, vi. 

 1878, p. 402, pi. iii. fig. B. 



VOL. III. 2 N 



