PKISTUEUS FLAVIPUNCTATUS. 59 
With reference to the mesial patch of enlarged scales on the belly, it is worthy of 
note that while it is present in both the types of P. carteri, no trace of it exists in the 
39 specimens doubtfully and tentatively referred by me to P. collaris, and that in all 
the other species of this genus it only rarely shows itself in the well-marked and perfectly 
distinct P. flavvpunctatus. Eecently, Mr. Boulenger has examined 294 examples of 
P. percristatus, but he makes no mention of its presence in any of them. Before 
accepting the specific identity of P. carteri and P. collaris, it should first be ascer- 
tained whether these enlarged scales are only sometimes present in the geckos from 
the island of Masira, or whether they are invariably absent in those from the Hadramut. 
The eAddence, as yet, that they are specifically identical does not appear to me to be 
conclusive. Nothing, moreover, can be definitely settled on this point until the 
essential characters of the types of P. collaris are known. 
It may be as well to point out that while the nostril in P. carteri is defined by two 
large nasals and by a small one, in 36 out of the 39 specimens of the Hadramut geckos 
it is perforated in a single, rather swollen, crescentic shield, the two horns of which 
are either in contact behind the nasal opening or are separated from each other by 
interposed granules. In the three exceptions, on the other hand, the nostril is formed 
as in P. carteri. 
