CRANIAL CHARACTERS OF LACERTA JACKSONl. 



27 



typically represented by Lacerta mosorensis, oxycephala, &c. 

 Except for the bones composing the occipital segment, and the 

 iisually more massive preemaxillary and maxillaries, all the others 

 assume a more or less foliated form. 



Facial portion. The snout appears much shorter and broader 

 than in the larger male, but is slightly more pointed in front. 



Text-fig. 7. 



Skull of female. 

 Upper, lower, lateral and posterior aspects. X 3j. 



Cranium {Fronto-parietal region). — Slightly broader than long 

 in proportion, owing to the incomplete development of its posterior 

 margin, which is crescentic in shape as, in all young examples. 

 Its median edge therefore barely reaches the anterior margin of 

 the supraoccipital. The upper surface, quite horizontal in its main 

 configuration, is longitudinally slightly undulated by alternately 

 being concave in its fronto-nasal and fronto-parietal parts re- 

 spectively, and convex in the intervening fi-ontal and pai'ietal 

 areas. 



Dermal incrustatio7i. Very sparse and transparent. The sulci 

 of the blood-vessels are sharply defined for their former rami- 

 fications. 



Lamina supraciliaris. Completely ossified also, as in the male, 

 and not bearing a trace of a membranous fontanelle. 



