AFRICAN SNAKES. 203 



8. GONIONOTOPHIS. 



Bouleng. Cat. Sn. i. p. 323. 



Two species, which may perhaps have to be reduced to one : — 



Temporals 2 + 2 Gr. brtissauxi. 



Temporals 1 + 2 Gr. vossii. 



1. GONIONOTOPHIS BRUSSAUXI. 



Gonionotus brussauxi Mocquard, Bull. Soc. Philom. (8) i. 

 1889, p. 146. 



Gonionotophis brussauxi Bouleng. 1. c. 

 Loudinia-Niari, French Congo. 



2. Gonionotophis vossii. 



Gonionotus vossii, Boettg. Zool. Anz. 1892, p. 418. 

 Gonionotophis vossii Bouleng. 1. c. 

 Cameroon to Congo. 



9. SlMOCEPHALUS. 



Giinth. Cat. Col. Sn. p. 194 ; Bouleng. Cat. Sn. i. p. 344. 



Syno2)sis of the Sp>ecies. 

 I. Three Labials entering the e3'e. 



Scales strong^ keeled, with strong striation directed obliquely 



towards the keel ; subcaudals 51-70 S. guirali. 



Scales feebly keeled ; subcaudals 65 S.'baumanni. 



II. Two labials entering the eye. 

 Scales strongly keeled, with lateral keels and strong striation ; 



subcaudals 53 S. lamani. 



Scales strongly keeled ; secondary keels feebly marked or absent ; 



subcaudals 75-124 S. poensis. 



1. SlMOCEPHALUS GUIRALI. 



Heterolepis guirali Mocquard, Bull. Soc. Philom. (7) xi. 1887, 

 p. 23, pi. ii. fig. 3. 



Simocephalus guirali Bouleng. t. c. p. 346. 

 West Africa, from Cameroon to the Congo. 



2. Simocephalus baumanni Sternf, Mitth. Zool. Mus. Berl. 

 1908, p. 214, fig. 1. 



Aruwimi, Togoland. 



3. SlMOCEPHALUS LAMANI, 



Mehelya lamani Lonnb. Ark. f. Zool. vii, 1911, no. 8, fio-. 1. 

 Lower Congo. 



4. SlMOCEPHALUS POENSIS. 



Heterolepis poensis A. Smith, 111. Zool. S. Afr., Rept. i. 



/Simocephalus poensis Bouleng. t. c p. 346. 



West Africa, from Sierra Leone to the Congo ; Uganda. 



