56 



THE SNAKES OF SOUTH AFRICA. 



Genus GLAUCONIA. 

 A single Genus in South Africa. 



KEY TO THE SPECIES. 



1. 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. 



2. 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. 



2 P\ 



prru 



Ut, 



■^w^> 



rw 



.V 





f^ 



y-.d 



-A 



..cor 



prv 



SKULLS OF GLAUCONL\ SNAKES. 



Fig. 26. — I. Side viiw showing the teeth in the lower jaw. There are 

 none in the upper jaw. 



2. Skull seen from above. 



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



(lirit. 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 lapialis. — No supraocular. In all the other species the 



supraocular is present. 



