67. pniLOTiuMjrirs. 101 



a. $ (V. 163; C. en. 150). Lagos. (Type of A. lagoensu.) 



6. rf (V. 165; C. 153). (One of the types of A. nitida.) 



Possibly not specifically distinct from P. scmivarieyatus. 



3. Philothamnus dor sails. 



Leptophis dorsalis, Bocage, Jorn. Sc. Lisb. i. 1866, p. (>9. 

 Aha-tulla dorsalis, Gunth. Ann. $ Mag. N. H. (4) i. 1868, p. 424. 

 Philothamnus dorsalis, Peters, Man. Berl.Ac. 1876, p. 119 ; Bocage, 



Jorn. Sc. Lisb. ix. 1882, p. 9, fig. ; Boettg. Ber. Senck. Gen. 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 praefrontals ; 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 1 18-145. Olive above, with a brown vertebral stripe ; 

 snout yellowish brown ; lower parts yellowish. 



Total length 840 millim. ; tail 290. 



Africa, from the Ogowe to Benguela. 



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



6. Ilgr. rf (V. 173; Angola. Prof. B. du Bocage [P.]. 



e. $ (V. 179; C. 131). Angola. J. J. Monteiro, ESQ. [P.]. 



rf. rf (V. 179; C. 14->). Carangigo. Dr. Welwitsch [P.J. 



e. (5 (V. 184 ; C. 133). Benguela. Prof. B. du Bocage [P.]. 



4. Philothamnus thomensis. 



Ahsetulla nitida, part., Giinth. Ann. Sf Mag. N. H. (3) xi. 1863, p. 286. 

 Philothamnus thomensis, Bocage, Jorn. Sc. Lisb. ix. 1882, p. 11, fig. ; 



Bedriaya, Amph. et Sept. I. de la Guinee (Istituto, xxxix.), p. 29 



(18M). 



Rostral 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 praefrontals; 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 



