11. LACHESIS. 535 



2. Lachesis lanceolatus. 



Moreau de Jonnis, Monogr. Trigonoc. des Antilles (1816). 



P Vipera caerulescens, Laur. Syn. Hept. p. 101 (1768). 



? Ooluter glaucus, Gmel. S. N. i. p. 1092 (1788). 



? Coluber ambiguus, Gmel. t. c. p. 1104. 



Coluber lanceolatus, Lacip. Serp. ii. pp. 80, 121, pi. v. fig. 1 (1789). 



tigrinus, Lacip. t. c. pp. 82, 136. 



brasiliensis, LacSp. t.c. pp. 98, 119, pi. iv. fig. 1. 



Vipera lanceolata, Latr. Heat. iii. p. 326 (1802) : Baud. JRept. vi. 



p. 28(1803). 



brasiliensis, Latr. op. cit. iv. p. 7 ; Baud. t. c. p. 86. 



Coluber megsera, Shaw, Zool. iii. p. 406 (1802). 



? Vipera weigelii, Baud. t. c. p. 60. 



Trigonocephalus lanceolatus, Oppel, Ordn. Hept. p. 66 (1811) ; Sdhkg. 



Phys. Serp. ii. p. 536, pi. xix. figs. 3 & 4 (1837) ; Rufz, EnquHe 



Serp. Martin. (1848) ; Oarm. Proc. Amer. Phihs. Soc. xxiv. 1887, 



p. 285 ; W. Buncan, Proc. Bristol Natur. Soc. (2) vi. 1889, p. 44. 



tigrinus, Oppel, I. c. 



CopHas lanceolatus, Merr. Tent. p. 155. 



atrox {non L.), Wied, Raise n. Bras. ii. p. 243 (1821). 



holosericeus, Wied, I. c, and Beitr. i. p. 490 (1825). 



Botbrops furia, Wagl. in S^ix, Serp. Bras. p. 52, pi. xx. (1824). 



leucoatigma, Wagl I. c. p. 63, pi. xxi. fig. 1. 



Cophias jararacca, Wied, Beitr. i. p. 470, and Abhild. (1825). 

 Craspedocepbalus lanceolatus, Fitzing. N. Class. Pept. p. 62 (1826); 



Gray, Cat. p. 5 (1849). 



jararaca, Fitzing. I. c. 



weigelii, Fitzing. I. c. 



Trigonocepbalus jararaca, Schleg. I. c. p. 532, pi. xix. figs. 1 & 2. 

 Botbrops megsera, Gray, Zool. Miscell. p. 47 (1842). 



siibscutatus, Gray, I. c. 



sabinii, Gray, L c. 



cinereus. Gray, I. c. 



Craspedocephalus atrox, part.. Gray, Cat. p. 6. 



Botbrops lanceolatus, Bum. ^ Bibr. vii. p. 1505 (1854); Pufz, 



Fnguete Serp. Martin. 2nd ed, (1859) ; Jan, Icon. G&n. 47, pi. i. 



fig. 1 (1875) ; A. E. Brown, Proc. Ac. Philad. 1893, p. 435. 

 jararaca. Bum. Sr Bibr. t. c. p. 1509 ; Jan, I. c. pi. iii. figs. 1^2; 



Lacerda, Leq. Yen. Serp. Bres. p. 10 (1884) ; F. Miill. Verh. Nat. 



Ges. Basel, vii. 1885, p. 699 ; A. E. Broum, I c. 

 . Craspedocephalus brasiliensis, Wticherer, Proc. Zool. Soc. 1863, p. 52. 

 Botbrops atrox, var. dirus, Jan, I. c. pi. ii. fig. 1. 



brasiliensis. Cope, Journ. Ac. Philad. (2) viii. 1876, p. 182. 



Trigonocepbalus atrox, Garm. N. Am. Rept. p. 124 (1883). 

 Botbrops jararacussu, Lacerda, I. e. p. 8. 



atrox septentrionalis, F. MUU. I c. 



Trigonocepbalus caribbaeus, Garm. Proc. Amer. PhUos. Soc. xxiv. 



1887, p. 285. 

 Botbrops glaucus, Vaill Bull Soc. Philom. (7) xi. 1887, p. 48. 

 — — atrox, part., Giinth. Biol C.-Am., Rept. p. 187 (1895). 



Snout rounded or obtusely pointed, ■with sharp, slightly raised 

 canthus. Rostral as deep as broad ; nasal divided ; upper head- 

 scales small, imbricate, more or less strongly keeled, in 5 to 10 

 longitudinal series between the supraoculars, which are large ; a 



