REPTILES FROM SIIOA AND ERITREA 549 



I am dis})Osed to regard, j)rovisionally, P. collaris (Stdr.) And. 

 as a variety of P. carteri. The snout is usually, but not constantly, 

 shorter, and a black band is present across the throat, though, 

 rarely, very indistinct. The types of P. carteri have the granules 

 on the middle line of the belly raised and conical, which is not 

 the case in any of the specimens referred Iw Dr. Anderson to 

 P. coUaris; but the fact that a similar development of the ventral 

 scales takes place in some sjiecimens of P. flavipuiiclatus (from 

 Aden) and not in others, shows this character to be one of very 

 doubtful importance for diagnostic purposes. 



0. Ptyodactylus lobatus. — 2 specimens from Alali, and 49 

 from Ghinda. This extensive material supports the view I 

 have previously taken as to the supposed species of this 

 genus (^). 



None of the specimens attain the extreme slender form of 

 some of the Egyptians; in size and proportions they mostly 

 approach the large and stout specimens known from Syria; but 

 the variations, both in scaling and proportions, are considerable, 

 and the tail assumes various forms according to its condition, 

 whether intact or reproduced. I have tabulated the characters 

 of a few specimens from Ghinda for the purpose of comparison 

 with the indications given by me in 1891 (Trans. Zool. Soc. 

 XIII, i)p. 112-114). 



illim. 



The largest specimen previously recorded (from Jerusalem) 

 measures 84 millim. from snout to vent. It will be noticed that 

 the proportions tabulated in the last column agree very closely 



(I) I need hardly poiut out that the numei-ous Syrian species described by Boutan 

 are founded upon merely individual variations, and cannot be accepted even as 

 constant varieties. 



