324 COLUBEID^. 



3. Gonionotophis grantii. (Plate XXIII. fig. 1.) 



Simooephalua grantii, Giinth. Ann. Sf Mag. N. S. (3) xii. 1863, 



p. 361. 

 Gonionotus grantii, Bouleng. Ann. Sr Mag. N. H. (6) viii. 1891, 



p. 345. 



Eostral nearly twice as broad as deep, scarcely visible from 

 above ; internasals very short ; frontal as broad as long, not quite 

 as long as its distance from the end of the snout, much shorter than 

 tbe parietals ; supraocular very small ; loreal twice as long as deep ; 

 one prse- and one or two postoculars ; temporals 1+2 ; seven upper 

 labials, third and fourth entering the eye, fifth sometimes in contact 

 with the parietal ; five lower labials in contact with the anterior 

 chin-shields, which are longer than the posterior. Scales rather 

 feebly keeled, lower row smooth, in 15 rows (19 on the neck). 

 Ventrals 167 ; anal entire : subcaudals 67. Blackish brown above, 

 the scales edged with lighter, yellowish beneath. 



Total length 410 millim. ; tail 90. 



West Africa. 



a-b. S (V. 167, 167 ; 0. 67, ?). W. Africa. Prof. Grant [P.]. 



(Types.) 



41. BOTHROPHTHALMUS. 



Bothrophthalmus, Peters, Mon. Berl. Ac. 1863, p. 287 ; Jan, Elenco 

 sist. Ofid. p. 57 (1863). 



MaxiUary teeth 23, anterior longest ; anterior mandibular teeth 

 longest. Head distinct from neck ; eye moderate, with round pupil ; 

 loreal region with a deep concavity. Body cylindrical, elongate ; 

 scales strongly keeled, without pits, in 23 rows ; ventrals rounded. 

 Tail moderate ; subcaudals in two rows. Hypapophyses developed 

 throughout the vertebral column. 



Tropical Africa. 



1. Bothrophthalmus lineatus. 



Elaphis (Bothrophthalmus) lineatus, Peters, Mon. Berl. Ac. 1863, 



p. 287. 

 Bothrophthalmus hrunneus, Oiinth. Ann. Sf Mag. N. H. (3) xii. 



1863, p. 356, pi. vi. fig. E ; F. Miill. Verh. nat. Ges. Basel, vii. 



1885, p. 680. 

 melauozostus, Jan, Elenco, p. 02 (1863), and Icon. G&n. 20, 



pi. V. (1867). 

 ■ lineatus, var. infuscatus, Buchh. ^ Peters, Mon. Berl. Ac. 



1875, p. 198. 



' modestus, Fischer, Abh. naturio. Ver. Hamb. ix. 1886, p. 13. 



lineatus, Boettg. Ber. Senck. Ges. 1887-88, p. 50. 



Rostral broader than deep, just visible from above ; internasals 

 much shorter than the proefrontals ; frontal once and a half to once 

 and two thirds as long as broad, at least twice as broad as the 



