56 



THE SNAKES OF SOUTH AFRICA, 



Genus GLAUCONIA. 



A single Genus in South Africa. 



KEY TO THE SPECIES. 



Glauconia nigricans. — Supraocular present. Rostral separated from 

 the supraocular by the upper part of the nasal ; diameter of 

 body 40 to 60 times in total length. 



Glauconia conjuncta. — Supraocular present. Rostral in contact 

 with the supraocular ; Rostral not more than twice the width 

 of the nasal, extending to, or slightly beyond a line connecting 

 the posterior borders of the eyes. Diameter of body 47 to 60 

 times in total length. 



SKULLS OF GLAUCONL\ SNAKES. 



There are 



Fig. 26. — I. Side view showing the teeth in the lower jaw. 

 none in the upper jaw. 



2. Skull seen from above. 



3. Skull seen from below showing toothless palate. A. Lower jaw. 



{Brit. Mus. Cat. Snakes.) 



3. Glauconia gracilior. — Differs from the former in having the diameter 



of the body 90 to no times in total length. Body very slender. 



4. Glauconia scutifrons. — Supraocular present. Rostral, very large, 



at least twice as broad as the nasal and extending beyond a hne 

 connecting the posterior border of the eyes ; diameter of body 

 50 to 80 times in total length. Snout rounded. 



5. Glauconia distanti. — Supraocular present. Snout with preoral part 



concave, appearing slightly hooked in profile. 



6. Glauconia labialis. — No supraocular. In all the other species the 



supraocular is present. 



