290 
REPTILES. 
[Chap. IX. 
parasites found on' the spotted lizard of Berar by Dr. 
Hooker, each of which presents the distinct colour of 
the scale to which it adheres. 1 
The marshes and pools of the interior are frequented 
by terrapins 2 , which the natives are in the habit of 
keeping alive in wells under the conviction that they 
clear them of impurities. These fresh-water tortoises, 
the greater number of which are included in the genus 
Emys of naturalists, are distinguished by having their 
toes webbed. Their shell is less convex than that of 
their congeners on land (but more elevated than that 
of the sea-turtle) ; and it has been observed that the 
more rounded the shell, the nearer does the terrapin 
approach to the land-tortoise both in its habits and in 
THE THREE-RIDGED TORTOISE (EMYS TRIJUGA) 
1 Hooker's Himalayan Journals, is distinct. It is generally distri- 
vol. i. p. 37. buted in the lower parts of Ceylon, 
2 Gryptopus granum, Schope. in lakes and tanks. It is the one 
Dr. Kelaart, in his Prodromus usually put into wells to act the part 
(p. 179), refers this to the common of a scavenger. By the Singhalese 
Indian species, C. punctata; but it it is named Kiri-ibba. 
