Dr. J. E. Gray on the Box Tortoises. 109 



Cyclemys plafynota. Gray, Cat. Shield Reptiles B.M. p. 43. 



Hub. Sumatra; Singapore (^a/Zffce). 



The head with a pale streak on each side, extended down the 

 upper part of the sides of the neck. 



The young specimens have one small black spot on the back edge 

 of the areola of the costal, and two on the back edge of the areola of 

 the vertebral plates. 



In the aberrant Cistudince the lobes are only moveable in the 

 young state; the suture that divides the bones of the sternum 

 into two parts is straight and transverse, while the front edge 

 of the pair of ventral shields overlaps its edge and forms a sinuous 

 line in front of the suture. The lobes of the sternum are narrower 

 than the opening of the thorax, as in Emys, and do not cover the 

 legs when they are contracted. 



This genus forms the transition to the Tortoises with solid and 

 fixed sternum ; but it is easily known from them by the sternum 

 being scarcely raised above the margin of the thorax, and by the 

 existence of the cartilaginous sutures between the sternum and thorax. 



7. Cyclemys. 

 The thorax convex or depressed. The sternum flat or slightly 

 convex, with the lateral symphysis well marked, truncated before 

 and notched behind ; the cross suture indistinctly marked and nar- 

 row, more or less obliterated in the adult, covered with the produced 

 front edge of the ventral shields. The legs covered with large, 

 baud-like, thin plates in front. The toes banded above ; the front 

 one short, webbed. The hind feet flattened, with the toes broadly 

 webbed ; the hinder edge keeled and angularly produced. 



* Thorax depressed, suborbicular. 



1. Cyclemys orbiculata. Bell, P. Z. S. 1834, p. 17. 

 Cyclemys dentata (adult), Gray, Cat. Shield Reptiles B.M. p. 42, 



t. 19. 



Shields brown-rayed. 



Hab. Java. 



The small figure of Emys dentata of my * Illustrations of Indian 

 Zoology' represents, I think, probably the young of Geoemyda gran- 

 dis, Gray (Ann. & Mag. N. H. 1860), judging by the series of spe- 

 cimens brought by M. Mouhot from Camboja. The larger figures 

 are those of a young Batagur. 



** Thorax oblong, convex. 



2. Cyclemys Oldhamii. 



Thorax oblong, convex ; back flattened, bluntly keeled, and with 

 a convexity in front, and two acute prominences at the end of the 

 two last vertebral shields ; costal plates rather convex, with the 

 areola on the upper hinder margin ; shields concentrically striated, 

 brown, with some black lines on the part of the costal shield near 

 the lateral keels ; margin toothed behind. Thorax flat ; shields pale, 

 with dark rays. 



