324 C0LUBRID7K. 



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



Simoceplialus grantii, Giinth. Ann. ^ Mag. N. H. (3) xii. 1863, 



p. 361. 

 Gonionotus gvantii, Bouhnq. Ann. Sj Mar/. N. II. (6) viii. 1891, 



p. 345. 



Hostral 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 

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

 one pTcie- 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. 



u-h. S (V. 167, 167 ; C. 67, ?). W. Africa. Prof. Grant [P.]. 



(Types.) 



41. BOTHROPHTHALMUS. 



Bothrophthahnus, Peters, Mon. Bed. Ac. 1863, p. 287 ; .Tan, Elenco 

 sist. Qfid. p. 57 (1863). 



Maxillary teeth 23, anterior longest ; anterior mandibular teeth 

 longest. Head distinct from neck ; eye moderate, Avith 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, 3Io?i. Berl. Ac. 1863, 



p. 287. 

 Bothrophthalnuis brunneus, Giinth. Ann. 8)- Mag. N. H. (3) xii. 



1863, p. 356, pi. vi. fig. E ; F. Mull. Verli. nat. Ges. Basel, vii. 



1885, p. 680. 



melanozostus, Jan, Elenco, p. (S'2 (1863), a^id Icon. Gen. 20, 



pi. V. (1867). 



lineatus, var. infiiscatus, Buchh. S)- Peters, Mon. Berl. Ac. 



1875, p. 198. 



modestus, Fischer, Ahh. naturto. T^er. Hamb. ix. 188G, p. 13. 



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



Eostral broader than deep, just visible from above ; internasals 

 much shorter than the pra)frontals ; frontal ouce and a half to once 

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



