TURTLES. 



53 



Callagur (94), Batagur (78), Hardella (131, fig. 53), Broolua (100), 

 and Liemys (93), of which the two latter are confined to Borneo. 

 They are characterised by the strength of the buttresses connecting 

 the upper with the lower shell, which project as vertical partitions into 

 the shell. In Kachuga the 4th vertebral shield is so elongated as to 

 cover 4 or 5 of the subjacent neural bones ; and in the small K. tectum 

 the middle line of the vaulted shell forms a ridge terminating in a 

 protuberance on the 3rd vertebral. Of the other three Indian genera, 

 Batagur is distinguished by having two ridges on the palate (in place 

 of one), and only four claws in the fore-limb. Kachuga tectum (96) 

 is one of the commonest Tortoises in the dykes about Calcutta. 



The true Turtles, family Chelonidce, have paddle-like limbs, and a Case 



Fig. 54. 



Young Hawksbill Turtles (Chelone imbricata) ; £ nat. size. (No. 181 •) 



flattened heart-shaped carapace, composed of comparatively few bones, 

 firmly welded to the ribs and vertebras, and covered with horny shields. 

 The short neck cannot be completely drawn into the shell, and the 

 temporal region of the skull is roofed with bone (fig. 48). There is no 



