SNAKES. 39 



a. Adult : without intestines. Cape of Good Hope. Presented 



by the Earl of Derby. 



b. Adult : discoloured. South Africa. 



c. d. Adult. South Africa. From the Haslar Collection. 



11. CORONELLA OLIVACEA. 



Coronella olivacea, Peters in Wiegm. Archiv, 1855, p. 52. 



Scales in nineteen rows ; anal bifid ; three posterior oculars. 

 Above uniform black ; belly in the middle uniform white, the 

 dark coloration of the back extending on the edges of abdomen. 

 Hinder maxillary teeth longest, smooth, in a continuous row with 

 the anterior ones. (See Ablahes rufulus and Cor. fuliginoides.) 



a. Adult female. Africa. From Mr. Argent's Collection. 



b. Adult male. Africa. From Mr. Argent's Collection. 



Description. — Body rather elongate; tail moderate, pointed, 

 but in both our specimens rather thick, even at the tip ; head 

 small, rather short, distinct from neck ; eyes large ; rostral shield 

 hardly reaching the surface of head ; anterior frontals small, 

 pointed in front ; posterior frontals moderate ; vertical narrow ; 

 occipitals moderate ; two nasals, one loreal, one anterior, three 

 posterior oculars ; ante-ocular just reaching the surface of head ; 

 eight upper labials, the fourth and fifth coming into the orbit ; 

 four or five temporal shields ; scales rhomboid, in nineteen rows ; 

 anal bifid. Above uniform black ; the coloration of back covering 

 the edges of ventral plates, so as to be yellowish only in the 

 middle of belly. In the stomach of one specimen I found some 

 frogs. Length of cleft of mouth §"; length of tail 3|"; total 

 length 18]". 



12. Coronella fuliginoides. 



Scales in seventeen rows ; anal simple ; three posterior oculars. 

 Above uniform brownish black, with a lighter collar or an indi- 

 stinct whitish spot on the neck; belly in the middle uniform 

 white, the dark coloration of the back extending on the edges 

 of abdomen. 



a. Adult male. West Africa. From the Haslar Collection. 



b. Half-grown. West Africa. From Mr. Rich's Collection. 



c. Half-grown. Old Calabar. Presented by — Logan, Esq. 



Closely allied to the former ; differing only in the above cha- 

 racters. 



13. Coronella semiornata. 



Coronella semiornata, Peters in Wiegm. Archiv, 1855, p. 51. 

 Scales in twenty-one rows ; anal bifid. Above olive ; anterior 



