67. PHILOTHiMNUa. 101 



a. 



S (V. 163; 0. ca. 150). Lagos. (Type oi A. lagoensis.) 

 b. d (V. 165; C. 153). ? (Oneof the typesof Amfe'rfa.) 



Possibly not specifically distinct from P. semivariegatus. 



3. PMlothamnus dorsalis. 



LeptopMs dorsalis, Socage, Jorn. Sc. Lish. i. 1866, p. 69. 

 AhsetuUa dorsalis, Guntk. Am. 8r Mag. N. H. (4) i. 1868, p. 424. 

 Philothamnus dorsalis, Peters, Mm. Berl. Ac. 1876, p. 119 ; Socage, 



Jorn. Sc. Lisb. ix. 1882, p. 9, fig. ; Soettg. Ser. Senck. Ges. 1888, 



p. 58. 



Rostral broader than deep, the portion visible from above mea- 

 suring about one fourth its distance from the frontal ; internasals 

 as long as or a little shorter than the prsefrontals ; frontal with 

 concave lateral borders, once and a half to once and two thirds as 

 long as broad, a little longer- than its distance from the end of the 

 snout, a little shorter than the parietals ; loreal at least twice as 

 long as deep ; one praeocular, in contact with or narrowly separated 

 from the frontal ; two postoculars ; temporals 1 + 1 ; nine upper 

 labials, fourth, fifth, and sixth entering the eye ; five lower labials 

 in contact with the anterior chin-shields, which are shorter than 

 the posterior. Scales in 15 rows. Ventrals 170-190 ; anal divided ; 

 subcaudals 118-145. Olive above, with a brown vertebral stripe ; 

 snout yellowish brown ; lower parts yellowish. 



Total length 840 miHim. ; tail 290. 



West Africa, from the Ogowe to Benguela. 



a. c? (V. 172 ; C. ?). Lower Congo. M. A. Linden [0.]. 



b. Hgr. d (V. 173 ; Angola. Prof. B. du Socage [P.]. 

 0. 141). 



c. $ (V. 179 ; C. 131). Angola. J. J. Monteii-o, Esq. [P.]. 



d. d (V. 179; C. 145). Carangigo. Dr. Welwitsch [P.]. 



«. d (V. 184; C. 133). Benguela. Prof. B. du Bocage [P.]. 



4. PMlothamnus thomensis. 



AhffituUa nitida, part., Giinth. Ann. Sf Mag. N.^ S. (3) xl. 1863, p. 286. 

 PhUothamnus thomensis, Bocage, Jorn. Sc. Lisb. ix. 1882, p. ll, fig. ; 



Sedriaga, Amph. et Sept. I. de la CfuinSe (Istituto, xxxix.), p. 29 



(1892). 



Eostral broader than deep, the portion visible from above mea- 

 suring not more than one fourth its distance from the frontal ; 

 internasals as long as the prsefrontals ; frontal with concave lateral 

 borders, once and two thirds as long as broad, longer than its distance 

 from the end of the snout, as long as the parietals ; loreal at least 

 twice as long as deep; one praeocular, in contact with or. narrowly 

 separated from the frontal; two postoculars; temporals 1 + 1 or 

 1 + 2 ; nine upper labials, fourth, fifth, and sixth entering the eye; 

 five lower labials in contact with the anterior chin-shields, which 

 are shorter than the posterior. Scales in 15 rows, Ventrals 



