SNAKES OF WEST AFRICA. 281 



7. SiMOCEPHALUS STENOPHTHALMUS. 



Heterolepis stenophthalmus Mocquard, Bull. Soc. Pliilom. (7) 

 xi. 1887, p. 16, pi. i. fig. 1. 



Siinoce2)hc(,his steiiojjhthalmus Bouleng. t. c. p. 347. 

 Gold Coast, Togoland, Gaboon. 



8. SiMOCEPHALUS CROSSi Bouleng. Cat. Sn. iij. p. 618. 

 S. Nigeria. 



9. SiMOCEPHALUS RiGGENBACHi Sternf. Mitt. Zool. Mus. Berl. 

 V. 1910, p. 63. 



Cameroon. 



11. Zamenis. 

 Wagl. Syst. Amph. p. 188 ; Bouleng. Cat. Sn. i. p. 379. 



1 . Zamenis dorri. 



Periops dorri Lataste, Le ISTatural. 1888, p. 227. 



Zamenis dorri Bouleng. t. c, p. 410. 



Senegal. 



12. Chlorophis. 



Hallow. Proc. Ac. Philad. 1857, p. 52; Bouleng. Cat. Sn, ii. 

 p. 91. 



Synopsis of the Sp)ecies. 



I. No trace of ventral keels ; ventrals 152-166; subcaudals 



85-99 C. ornatus. 



II. ^'eutrals with more or less distinct lateral keel. 

 A. Anal divided ; scales in 15 rows. 

 Pra»ocular separated from frontal ; bod^^ very slender anteriorly ; 



ventrals 175-190; subcaudals 115-190 C. heterolepidotvs. 



Pra30cular in contact with or narrowly separated from frontal ; 



ventrals 150-182 ; snbcaudals 90-133 C. irregularis. 



B. Anal entire; ventrals 141-162 ; subcaudals 75-96. 



Scales in 15 rows C. heterodermtis. 



Scales in 13 rows , C. carinatus. 



1. Chlorophis ornatus. 



Philothamnus ornatus Bocage, Jorn. Sc. Lisb. ii. 1872, p. 80. 

 Chlorojyhis ornatus Bouleng. t. c. p. 93. 

 Portuguese Guinea, Angola. 



2. Chlorophis heterolepidotus. 



AhcetuUa heterolepidota Giintb. Ann. & Mag. N. H. (3)xi. 1863, 

 p. 286. 



Chlorophis heterolejndottis Bouleng, t. c. p. 95, pi. v. fig. 3. 

 Chlorophis gracilis Sternf. Mitt. Zool. Mus. Berl. v. 1910, p. 64. 

 Gold Coast to Angola, eastwards to tlie coast of Zanzibar. 



