G7. PHILOTHA.MNUS. 101 



a. 2 (V. 103; C. ca. 150). Lag-os. (Type oi A. lagoensis.) 



b. c? (V. 165; C. 153). -? (Oneof the types of ^.m/«j(7«.) 



Possibly not specifically distinct from P. semivarief/atus. 



3. Philothamnus dorsalis. 



Leptophis dorsalis, Bocmje, Jorn. Sc. Lisb. i. 1866, p. (iO. 

 Ahretulla dorsalis, Gilnth. Ann. 8r Mar/. N. H. (4) i. 1868, p. 424. 

 Philothamnus dorsalis, Peters, Man. Perl. Ac. 1876, p. 119 ; Pocar/e, 



Jorn. Sc. Lisb. ix. 1882, p. 9, tig. ; Poetty. Per. 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 prajfroutals ; 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 priEOCular, 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 ; aual divided ; 

 subcaudals 1 18-145. Olive above, with a brown vertebral stripe ; 

 snout yellowish brown ; lower parts yellowish. 



Total length S40 millim. ; tail i!90. 



West Africa, from the Ogowe to Benguela. 



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



b. Hgr. c? (V. 173 ; Angola. Prof. B. du Bocage [P.]. 

 0. 141). 



c. 2 (V. 179; C. 131). Angola. J. J. Monteiro, Esq. [P.]. 



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



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



4. Philothamnus thomensis. 



Ahfetulla nitida, part., Giinth. Ann. S,- Mag. N. H. (3) xi. 1863, p. 286. 



Philothamnus thomensis, Pocage, Jorn. Sc. Lisb. ix. 1882, p. ll, fig. ; 



Pedriaga, Amph. et Rept. I. de la Guinee {Istituto, xxxix.), p. 29 



(1892). 



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 pnefrontals ; 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 l-f-l or 

 l-|-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 



