182 



COLUBRIDJE 



nearly allied to Zamenis, but distinguished principally 

 by the posterior teeth of the upper jaw not being at 

 all enlarged, and, further, in being, like Coronella, 

 constrictors. . 



9. Coluber quatuorlineatus, Lacepede 



(Elaphis cervone, Aldrovandi ; Coluber 



quatuorradiatus, Gmelin) 



Aldrovandi's Snake 



Form. — Moderately slender. Snout obtuse, 

 scarcely prominent. Tail one-sixth to one-fourth 



of the total 

 length. 



Head-Shields. — 

 Rostral broader 

 than deep, just 

 visible fr o m 

 above. Frontal 

 once and one- 

 fourth to once 



Fig. 22 (after Sordelli) , , ir 



v and a half as 



long as broad, as long as its distance from the 

 rostral, shorter than the parietals. Loreal nearly 

 as long as deep, with one or two small shields 

 below it. One preocular, rarely divided, with 

 a subocular below it ; two or three postoculars. 

 Temporals 2 + 3 or 3 + 4. Upper labials eight 

 (exceptionally nine), fourth and fifth (or fifth and 

 sixth) entering the eye. Four or five (rarely three) 



