Revised List of Soutli African Reptiles and Batracliians. 601 



Natal, Zululancl, Transvaal, Southern Rhodesia, Portuguese East 



Africa, Tropical Africa. 

 Natal: Durban (Bowker). 

 Southern Ehodesia : Salisbury (Thomas). 



Family COLU BRIDGE. 



Synopsis of the South African Genera. 



I. Afih/phcc, without grooved fangs in the upper jaw. — Harm- 

 less. 



A. Scales smooth, in 19 rows or more. 



1. Pupil round ; posterior maxillary teeth longest. 

 Scales in 19 rows; internasal not entering the nostril; snout 



rounded Trojndonotns. 



Scales in 27 to 31 rows ; internasal entering the nostril ; snout 



with vertical sides, more or less prominent Pseiidaspii. 



2. Pupil vertically elliptic or subelliptic ; anal entire. 

 Scales in 19 rows ; frontal at least once and a half as long as 



broad; maxillary teeth equal Ahlahophig. 



Scales in 19 to 23 rows; frontal broad and short; posterior 



maxillary teeth shortest Lanqn-ophis. 



Scales in 23 to 33 rows, with apical pits ; anterior maxillary teeth 



strongly enlarged Boodon. 



B. Scales smooth, in 15 or 17 rows. 



1. Tail short (subcaudals not more than 50 pairs). 

 Pupil vertically elliptic ; rostral small ; anterior maxillary teeth 



longest Liici'phidiuin. 



Pupil vertically elliptic ; rostral very large, with angular hori- 

 zontal edge ; posterior maxillary teeth strongly enlarged . . . . Pvoaymna. 

 Pupil round ; rostral small ; nasal single ; anterior maxillary 

 teeth longest Homaloaoma. 



2. Tail long (subcaudals more than 80 pairs) ; pupil 

 round ; posterior maxillary teeth longest. 



Subcaudals not keeled Cldoroplii.^. 



Subcaudals keeled and notched Flnli>tlnuiinu)i. 



C. Scales keeled ; pupil vertically elliptic. 



Scales in 15 or 17 rows, of vertebral row enlarged and bicarinate ; 



anterior maxillary teeth longest Siinoceplialns. 



Scales in 23 to 27 rows, laterals very oblique and with serrated 



keels; teeth very small and few Daxypeltis. 



II. Opisthoglypha;, with grooved fangs at the jposterior end of 

 the upper jaw. — More or less poisonous. 



A. Eye moderate or large ; head more or less distinct from 

 neck. 



1. Subcaudals single ; puj)!! vertically elliptic ; parietals 



broken up into small shields Pijtlioiiudipgus. 



2. Subcaudals in pairs. 



a. Pupil vertically elliptic; scales in 17 or 19 rows. 

 Anal divided ; loreal separated from the eye by the prajocular ; 

 maxillary teeth decreasing in size posteriorly Tavhophis. 



