276 MR. G. A. BOULENGER OX THE 



1. Tropidoxotus FULIGINOIDES. 



Coronella fuliglnoides Giinth. Cat. Col. Sn. p. 39. 

 Trojndonotusfuliginoides Bouleng. t. c. p. 217. 

 Ookl Coast to Congo. 



2. Tropidonotus variegatus. 



Mizodon variegatus Peters, Mon. Berl. Ac. 1861, p. 358. 

 Tropidonotus variegatus Bouleng. 1. c. 

 Gold Coast to Cameroon, 



3. Tropidonotus olivaceus. 



Coronella olivacea Petei's, Mon. Bei'l. Ac. 1854, p. 622. 

 Tropidonotus olivaceus Bouleng. t. c. p. 227. 

 Tropical Africa, from the Soudan to Namaqualand and 

 Southern Rhodesia. 



4. Tropidonotus ferox Giinth. Ann. k Mag. N. H. (3) xii. 

 1863, p. 355, pi. vi. fig. F ; Bouleng. t. c. p. 241. 



Sierra Leone to Calabai'. 



2. Helicops. 



Wagler, Syst. Amph. p. 170 ; Bouleng, Cat. Sn. i. p. 272. 



1. Helicops gendrii Bouleng. Ann. & Mag. N. H, (3) v. 1910, 

 p. 512. 



French Guinea. 



3. Hydr^thiops. 



Giinth. Ann. & Mag. N. H. (4) ix. 1872, p. 28 ; Bouleng. Cat. 

 Sn. i. p. 280. 



Two species : — 



Scales keeled, in 25 rows ; ventvals 143-156 ; 5tli and 6th or 6th 



and 7tli upper labials entering eye H. melanogaster. 



Scales smooth, in 21 rows ; ventrals 151-165 ; 4th and 5th upper 



labials entering eye, 6th and 7tli in contact with parietal... S. Icevis. 



1. HTDR.^rHiops melanogaster Giinth. Ann. &■ Mag. N. H. (4) 

 ix. 1872, p. 28, pi. iii. fig. G ; Bouleng. t. c. p. 281. 



Cameroon to Congo, eastwards to the Ituri. 



2. Hydr^thiops l.evis Bouleng. Ann. &, Mag. N. H. (7) xiii. 

 1904, p. 450. 



Cameroon. 



4. Bothrophthalmus. 



Peters, Mon. Berl. Ac. 1863, p. 287 ; Bouleng. Cat. Sn. i. p. 324. 



1. Bothrophthalmus LINEATUS. 

 ElapMs {Bothrophthalmus) lineatus Peters, 1. c. 

 Bothrophthalmus lineatus Bouleng. 1. c. 



"West and Central Africa, from the Gold Coast and Uganda to 

 the Congo. 



