144 



Lacertidse, 



or the tympanum to the side of the body, where it is broken up 

 into a series of spots ; a dark, liij^ht-edged band along each side of the 

 tail. Lower parts greenish, greyish or reddish, spotted with black on 

 the sides ; males with blue spots on the ventral plates of the outer 

 series. 



Measurements (in millimetres) : 



Particulars of Specimens Examined. 



6. 



Mechelripsch, 

 nomoi'skaja 



Gov. Tscher- 



S Lagodechi . 



$ lasotchka, near Svichum, 400 m. 



., Borjom 



<J Bakuriani, near Borjom, 1200 m. 



Columns as on p. 139, but No. 8 referring to the niimber of granules between 

 supraoculars and superciliaries, and No. 9 to the anterior upper labials. 



Habitat. — Caucasus and Crimea. 



I agree with Nikolsky in regarding L. derjttgini as most nearly 

 related to L. vivipara, from which it differs chiefly in the smaller 

 scales (38-53 across the body, instead of 25-37), and the constant 

 presence of granules between the supraoculars and the superciliaries. 

 If I am right in considering the presence of a dark vertebral streak or 

 series of spots as more primitive than its absence, I cannot follow 

 Mehely's view that L. derjugini is derived from L. muraUs, var. 

 cnucasica. On the other hand, whilst lepidosis and markings are in 

 accordance with my principles for deriving this lizard directly from 

 L. vivipara, the presence of two postfrontal bones is opposed to such 



