47. SIMOCEPH.VLUS. 347 



a. S (V. 252 ; C. ?). Fenumdo Po. Niger Expedition. 



b, c. $ (V. 248, 251 ; Fernando Po. Sir A. Smith [P.]. 

 C.96, 93). 



d. 2- (^ • 256 : C. 0.3). Cameroons. Liverpool Miiseuni. 



e. $ (V. 242 ;' C. 8S). Cameroons. Dr. J. G. Fischer. 



f. 2 (V. 253; U. 94). Klobv di.-trict. 



g. 2 (V. 253 ; C. 85). Old Calabar. W. Logan, Esq. 



[P.J. 

 h. 2 (V. 247; C.?). Sierra Leone. 11. C. Hart, Esq. 



[P.l. 

 i. Yg. (V. 251 ; C. 124). W. Africa. J. C. 'Salmon, Esq. 



Z-, I. Yg. (V. 253, 2.50; W. Africa. 



C. 92, 104). 



[P.]. 



4. Simoceplialus nyassae. (PL.vrB XXIII. fig. 2.) 



Simocephalus uj-asss, G'unth. Ann. &■ Mag. N. H. (G) i. 1888, 

 p. 328. 



Ilostral mncli broader than deep, just visible from above ; inter- 

 nasals broader than long, half the length of the prajfrontals ; frontal 

 a little longer than broad, as long as its distance from the rostral, 

 much shorter than the parietals ; loreal longer than deep ; one 

 pme- and one postocular ; temporals 1 + 2; seven upper labials, 

 third and fourth entering the eye, fifth sometimes touching the 

 parietals ; five lower labials in contact with the anterior chin- 

 shields, which are longer than the posterior. Scales strongly 

 keeled, with secondary keels and tubercles, in 1-5 rows (17 on 

 the neck). Ventrals 171-178; anal entire; subcandals 02-63. 

 Blackish brown above, paler brown below, the chin and the lateral 

 ventral keel vellowish. 



Total length 460 millim. ; tail 100. 



Lake Nyassa ; Zanzibar. 



a. Hgr. (V. 178: C. 63). L. Nvassa. (Tvpe.) 



b. Yg. (V. 171 ; C. 02). Zanzibar. Sir J. Kirk .T.]. 



5. Simocephahis stenophthalmus. 



Heterolepis stenophthalmus, MoajuarJ, Bull. Soc. Philo7n. (7) xi. 

 1887, p. 16, pi. i. tig. 1. 



Differs from //. 2>oensis in the smaller eye, which is scarcely 

 larger than the nostril, the presence of a single postocular, the le?s 

 strongly keeled scales, and the number of ventrals (206-214) and 

 subcandals (59). Uniform dark puridish brown above ; belly 

 yellowish, with a purplish-brown spot on the outer end of each 

 ventral ; subcaudals brown with whitish posterior edge. 



Total length 590 millim.; tail 110. 



Coast of Guinea. 



