210 MR. G. A. BOULENG ER ON 



II. Eye rather small, small, or very small ; head not at all distinct from neck ; 

 no loreal. 



A. Subcaudals in two rows. 



1. One or two upper labials in contact with the parietal ; nasal in contact 



with the rostral. 

 Intemasals present ; nasal divided or semidivided ; no pra> 



ocular; scales in 19 or 21 rows Calamelaps. 



Internasals present, prefrontals absent ; supraocular absent 



or fused with the postocular ; snout much depressed, very 



prominent, pointed ; rostral very large ; scales in 17 or 21 



rows Xenocalamus. 



No intemasals; nasal entire; a very small prseocular ; scales 



in 15 rows Apostolepis. 



2. Temporals separate the upper labials from the parietal; scales in 



15 rows. 



First upper labial in contact with the internasal Miodon. 



Nasal in contact with the rostral Ci/nodontophis. 



B. Subcaudals single ; scales in 15 rows. 



1. Temporals separate the labials from the parietal ; 



snout much depressed and very prominent; 



rostral very large, concave below Hypoptophis. 



2. One or two upper labials in contact with the parietal. 



Posterior maxillary teeth large and strongly grooved Aparallactus. 



Posterior maxillary teeth feebly enlarged and feebly grooved . JSlapops. 



1. Tarbophis. 



Fleischm. Dalra. nov. Serp. Gen, p. 17 ; Bouleng, Cat. Sn. iii. 

 p. 47. 



1. Tarbophis semiannulatus. 



Telescopus semiannulatus A. Smith, 111. Zool. S. Afr., Rept. 

 pi. lxxii. 



Tarbophis semiannulatus Bouleng. t. c. p. 51. 



Crotaphapeltis semiannulatus Bocage, Herp. Ang. p. 122. 



Central and East Africa, Angola, Rhodesia, Transvaal, 

 Basutoland. 



2. Leptodira. 



GUnth. Cat, Col. Sn. p. 165 ; Bouleng, Cat. Sn. iii, p, 88, 

 Two species : — 



Ventrals 144.-180 ; anal entire ; subcaudals 32-54 ; body moderately 



elongate L. hotamboeia. 



Ventrals 201-216.; anal divided; subcaudals 94-113; body very 



slender L. duchesnii, 



1. Leptodira hotamboeia. 



Cor-onella hotamboeia Laur. Syn. Rept. p. 85. 

 Leptodira hotamboeia Bouleng. t. c. p. 89. 

 Crotaphopeltis rufescens Bocage, Herp. Ang. p. 122. 

 Tropical and South Africa. 



2. Leptodira duchesnii Bouleng. Ann. Mus. Congo, Zool. ii. 

 1901, p. 10, pi. iv. fig. 1. 



Congo, Gaboon, Cameroon, 



