SNAKES OF EAST AFEICA. 



613 



Text-figure 2. 

 (Prom P. Z. S. 1915, p. 195.) 



ventrals 



; ( 15 rows) 



ventrals 



scales ( 21 rows) 

 B. 



Scaling of thickest part of bodJ^ 



A. Gastropi/xis smaragdina, with keeled scales and bicarinate vetitral shields. 



B. Dipsadomorjphus blandingii, with oblique scales and enlarged vertebrals. 



The following map (text-fig. 3) shows the boundaries of the 

 divisions adopted in this series of papers. Divisions II and III 

 have been dealt with, tiie present paper treating of Division 

 IV:— 



Text-figure 3. 



Division of Africa into seven districts. 



