388 



coirrBETDai. 



to one half as long as its distance from the frontal ; internasals as 

 long as the praDfrontals, not reaching the prseocular ; frontal once 

 and a half as long as hroad, as long as its distance from the end of 

 the snout, as long as the parietals ; one or two prae- and, two post- 

 oculars ; one, two, or three suboculars ; temporals 1 + 2 or 3 ; seven 

 upper labials, fourth or third and fourth entering the eye, sixth 

 largest and in contact with the lower suboculars ; four lower labials 

 in contact with the anterior chin-shields, which are as long as or a 

 little longer than the posterior. Scales in 15 rows on the neck as 

 well as on the body. Ventrals 194-195 ; anal entire; subcaudals 88. 

 Black above, uniform or with transverse series of small whitish 

 spots ; sides of head and end of snout white, with most of the 

 sutures between the shields black ; ventrals white, with a black 

 edge, which becomes gradually broader until, on the posterior 

 fourth of the body, the shields are entirely black; subcaudals 

 black. 



Total length 1750 millim. 



Lower Niger. 



a. S (V. 195 ; C. P). Asaba. W. H. Crosse, Esq. 



[P.]. (Type.) 



b. Yg. (V. 194; 0. 88). Mouths of the Niger. A. Millson, Esq. [P.]. 



10. Naia guentheri. (Plate XXI.) 



Pseudohaje nigra, Oiinth. Cat. p. 222 (1858), nee Naia nigra, Smith. 



Eye large, about two thirds the length of the snout. Eostral 

 broader than deep, the portion visible from above measuring one third 

 its distance from the frqntal; internasals as long as the prsef rentals, 

 not reaching the prseocular ; frontal once and one third as long as 

 broad, as long as its distiince from the end of the snout, two thirds 

 the length of the parietals ; one prseocular ; thr«e postoenlars, one 

 of which may be termed a subocular; seven upper labials, third and 

 fourth entering the eye, sixth largest and in contact with the 

 lower postoculars ; four lower labials in contact with the anterior 

 chin-shields, which are as long as the posterior. Scales in 15 rows 

 on the neck, in 13 rows on the body. Ventrals 185 ; anal entire ; 

 subcaudals 74. Black above, brown beneath. 



Total length 2130 millim. ; tail 470. 



West Africa ? 



a. c? (V. 185; 0.74). -? Lord Derby [P.]. (Type.) 



233. SEPEDON. 



Sepedon, Merrem, Tent. 8yst. Amph. p. 146 (1820) ; Wagler, Si/st. 



Amph. p. 173 (1830) ; Oray, Oat. Sn. p. 32 (1849) ; Bum. 8c Bibr. 



Hrp. Gen. vii. p. 1258 (1864). 

 Naja, part., Schleg. Phya. Serp. ii. p. 461 (1837). 

 Aspidelaps, part., Jan, Rev. 8f Mag. Zool. 1869, p. 510. 



