280 MR. G. A. BOULEN'GER ON THE 



10. SiMOCEPHALUS. 



Giintli. Cat. Col. Sn. p. 194 ; Boiileng. Cat. Sn. i, p. 344. 

 Synopsis of the Species. 



I. Scaler, in 15 rows on bod,y ; temporals 1 + 2 (varelj- 1 + 3). 



A. Eye much larger than nostril. 



1. Ventrals 203-255 ; suhcaudals 45-70. 



a. 2 labials (3rd and 4th) entering- the eye. 



Scales with parallel secondary keels or tubercles ; loreal present. S. capensis. 

 Scales with strong striation directed obliquely towards the keel ; 



loreal absent S. jjhyllopholis. 



b. 3 labials (3rd, 4tli, 5th) entering the eye, unless 5th separated by « 



subocular detached from it. 

 Scales strongly keeled, with strong striation directed obliquely 



towards the keel S. guirali. 



Scales feebly keeled S. haumaniii. 



2. Ventrals 239-262 ; suhcaudals 75-124; scales without 



secondary keels S. jjoensis. 



3. Ventrals 178 ; suhcaudals 62 S. rosfralis. 



B. Eye scarcely larger than the nostril ; scales feebly 



keeled; ventrals 205-228 ; suhcaudals 49-59 8.stenopl>thc(lmiis. 



II. Scales in 17 or 19 rows on body ; ventrals 229-234 ; suhcaudals 53-68. 



Scales in 17 rows ; temporals 2 + 3 S. crossi. 



Scales in 19 rows ; temporals 1 + 2 S. riggenhacJii. 



1. SiMOCEPHALUS CAPENSIS. 



Heterolepis capensis A. Smith, 111. Zool. S. Afr., Rept. pi. Iv. 

 Simocephahts capensis Bonleng. t. c. p. 345. 

 Gaboon, E. Africa, Nyassaland, Natal. 



2. SiMOCEPHALUS PHYLLOPHOLis Werner, Zool. Anz. xxiv. 1901, 

 p. 301. 



Cameroon. 



3. SiMOCEPHALUS GUIRALI. 



Heterolepis guirali Mocquard, Bull. Soc. Philom. (7) viii. 1884, 

 p. 145. 



SimocepJtalus guirali Bouleng. t. c. p. 34(1 

 Cameroon to Congo. 



4. SiMOCEPHALUS BAUMANNi Sternf. Mitt. Zool. Mus. Berl. iv. 

 1908, p. 214. 



Togoland. 



5. SiMOCEPHALUS POENSIS, 



Heterolepis poensis A. Smith, 111. Zool. S. Air., Kept. 

 Simocepltalus poensis Bouleng. t. c. p. 346. 

 Sierra Leone to Congo and Uganda. 



6. SiMOCEPHALUS EOSTRALis Sternf. Mitt. Zool. Mus. Berl. v. 

 1910, p. 63. 



Cameroon. 



