snakes of west africa. 283 



14. Gastropyxis. 



Cope, Proc, Ac. Philad. 1860, p. 556 ; Bouleng. Cat. Sn. ii. 

 13. 102. 



Two species : — 



Ventrals 150-174 ; subcaudals 129-172 G. smaragdiiia. 



Ventrals 185-191 ; subcaudals 170-177 Gr. prineipis. 



1. Gastropyxis SMARAGDIXA. 



Bendropliis smaragdina Sclileg. Phjs. Serp. ii. p. 237. 

 Gastropyxis smaragdina Bouleng. t. c. p. 103. 

 Tropical Africa, from Sierra Leone and Uganda to the Congo 

 4ind Northern Angola. 



2. Gastropyxis principis Bouleng. Ann. Mus. Genova, (3) ii. 

 1906, p. 213, fig. 



Prince's Id., Gulf of Guinea. 



1 5. Hapsidophrys. 



Fischer, Abh. iSTat. Ver. Hamb. iii. 1856, p. 110; Bouleng. 

 €at. Sn. ii.p. 103. 



1. Hapsidophrys lixeata Fischer, t. c. p. Ill, pi. ii. fig. 5; 

 Bouleng. t. c. p. 104. 



Gold Coast to Congo, eastwards to Uganda and L. Tanganyika. 



16. Thrasops. 



Hallow. Proc. Ac. Philad. 1857, p. 67; Bouleng. Cat. Sn. ii. 

 p. 104. 



Two species : — 



Rostral little broader than deep; ventrals 179-215; subcaudals 



128-146 T.faviffularis. 



Rostral much broader than deep ; Tentrals 163-174 : subcaudals 



101-114 ■ T. hatesii. 



1. Thrasops flavigularis. 



Dendrophis flavigularis Hallow. Proc. Ac. Philad. 1852, p. 205. 

 Thrasops fiavigular is Bouleng. t. c. p. 105. 

 Sierra Leone to Congo. 



2. Thrasops batesii Bouleng. Ann. k, ALag. N. H. (8) ii. 1908, 

 p. 92. 



Cameroon. 



17. Rhamnophis. 



Gunth. Ann. & Mag. N. H. (3) ix'. 1862, p. 129 ; Bouleng. 

 Cat. Sn. fii. p. 632. 



Two species : — 



■Scales smooth ; a pair of large shields behind the parietals 'R. (sthiops. 



Scales more or less distinctly keeled on the middle of the back ; no 



large occipital shields R. jacksonii. 



