TORTOISES. 35 



19. Dum. et Bib. E. G. ii. 350, t. 17, f. 1. T. longicauda, Shaw, 

 Mus. Col. Surg. 



Shell oblong, depressed, centre impressed, doubly keeled, 

 bluntly toothed behind. Younger ; shell three-keeled, hinder edge 

 sharply toothed. Sehoepf. t. 6. 



a. Young animal, stuffed. N. America. Presented by Gen. 



Hardwicke. 



b. Adult. 



8. Platysteknon, Gray. 



Head very large, covered with a thick hard horny case; jaws 

 very strong. Neck very thick, short, subretractile, with small 

 granular scales. Limbs very large, contractile, not capable of be- 

 ing retracted into the shell, covered with long lunate scales in front, 

 and fringed on the outer hinder sides. Toes 5-4, webbed to the 

 claws ; claws very strong. Tail elongate, cylindrical. Shell de- 

 pressed, expanded, thin, covered with thin horny shields. Ster- 

 num flat, broad truncated in front and behind, united to the thorax 

 by a bony symphysis, covered with three small additional shields, 

 Axillary and inguinal plates small or none. Sternal shields 12, 

 gular pair very short, broad, band-like. Asia. 



The Cashed Terrapin. Platysternon megacephalum, Gray, 

 Pr. Zool. Soc. 1831, 106. Illuslr. hid. Zool. t. Dum. et Bib 



E. Gen. ii. 345. Schlegel, Fauna Jap. 49. 



Deep brown, edge of the shields grooved and slightly radiately 

 striated; head brown rayed, cheeks pale spotted; sternum pale 

 yellowish. 



«. Stuffed. China. Presented by J. R. Reeves, Esq. 



