330 COLTJBRIDJB. 



above ; internasals much shorter than the prsefrontals ; frontal as 

 long as or longer than its distance from the end of the snout, a little 

 shorter than the parietals ; loreal longer than deep ; one prseocular, 

 not extending to the upper surface of the head ; two postooulars ; 

 temporals 1 + 2 ; eight or nine upper labials, usually three of which 

 enter the eye ; four lower labials in contact with the anterior chin- 

 shields, which are a little longer than the posterior. Scales in 21 

 or 23 rows; ventrals 194-207; anal entire; subcaudals 50-60. 

 Brown above, \v"ith three more or less distinct darker longitudinal 

 streaks ; snout and sides of head pale, with a brown black-edged 

 temporal streak, and another from below the eye to the mouth ; 

 lips with a few large brown spots; lower parts brown, chin and 

 throat spotted with darker. 



Total length 850 millim. ; tail 135. 



Seychelles. 



a-c. cJiSc. 2.3, 23; V. 194, 194; Seychelles. Prof. E. P. Wright [P.l. 

 C. 59, 60) & ? (Sc. 23 ; V. 207 ; (Types of B. seychellcmsis.) 



3. Boodon infernalis. (Plate XXI. fig. 1.) 

 Boodon infernalis, Giinth. Cat. p. 199 (1858). 



Eye small. Eostral much broader than deep, not extending to 

 the upper surface of the snout, forming a broad suture within the 

 internasals, which are much shorter than the prefrontals; frontal 

 once and a half to once and two thirds as long as broad, as long 

 as its distance from the end of the snout, shorter than the parietals ; 

 loreal at least twice as long as broad ; one or two praeooulars, not 

 extending to the upper surface of the head ; two (rarely one) post- 

 oculars ; temporals 1-1-2; eight upper labials, third, fourth, and 

 fifth entering the eye ; four lower labials in contact with the 

 anterior chin-shields, which are as long as the posterior, or a little 

 longer. Scales in 23 or 25 rows. Ventrals 175-195 ; anal entire; 

 subcaudals 48-70. Uniform dark olive or blackish all over, or 

 lower parts yellowish. 



Total length 790 millim. ; tail 125. 



East and South Africa. 



a-b. S (Sc. 23 ; V. Zanzibar. Capt. Speke fP.! 



176; 0.54) & 5(Sc. 



23 ; V. 179 ; C. 48). 

 c,d. d" (Sc. 23, 23; V. S.Africa. Haslar Collection. ) 



176, 175; 0.59, F). / ,„ . 



e. d (Sc. 25; V. 195; Port Natal. Rev. H. Calloway n^yP«s-) 



0.70). [P.]. 



/. 2 (Sc. 23 ; V. 194 ; Natal. E. Hewlett, Esq. rp.l 



C. 53). 

 ff. Hgr. (Sc. 25 ; V. 195 ; Port Elizabeth. J. P. M. Weah, Esq. fP.! 



0. 54), , ' -1 L J 



k. Hgr. (Sc. 25 ; V. 186 ; Damaraland. 

 C. 51). 



