TURTLES. 53 



c. Head, very large. Upper jaw with 2 convex ridges, the hinder 

 ones rounded, convex. C. Ruppellii, Gray, B. M. India ? 

 Presented by Thomas Bell, Esq. 



The Long Caouanne. Caouana elongata. 



Shell elongate, rather flattened in the middle, convex on the 

 sides, and slightly dilated and flattened upon the side and con- 

 tracted on the hinder edges; marginal plates 27, last pair much 

 longer; caudal plates square, large, much longer than broad; ver- 

 tebral plates elongate, 6-sided, half as long again as broad : claws 

 ? Head ? 



a. Shell only, adult. 



The Olive Caouanne. Caouana olivacea. Chelonia olivacea, 

 Eschscholtz, Zool. Atl. t. 3. Ch. caouana, var. Gray, Syn. 54. 

 Ch. Dussumierii, Dam. et Bib. E. G. ii. 557. Ch. subcarinata, 

 Rupp. MS. Mus. Francf.P 



Claws one on each foot ; marginal shields 27 ; back flat, sides 

 rather concave, side-edges expanded, slightly bent up; vertebral 

 plates narrow, elongate, longer than wide ; caudal plate subtri- 

 angular, longer than broad, much larger than the other marginal 

 plates : head moderate. 



a. In spirits, very young. Without any narrow anterior vertebral 



plate, (the 2 united ?) Philippine Islands. 



b. Stuffed, adult. With a narrow anterior vertebral plate. 



3. Caretta. 



Thorax ovate, cordate, covered with 13 thick, horny plates, 

 which are produced and imbricate on their hinder edge. Muzzle 

 elongate, compressed. Jaws with the edge straight, toothless, and 

 the tip slightly recurved, side of lower jaw with a single elongated 

 shield. Sternum keeled on each side. 



The Caret. Caretta imbricata. Chelonia irabricata, Schw. 

 Prod. 291. Gray, Sun. 25, t. 7,f. 2. Bum. et Bib. E. G. ii. 547, 

 t. 13,/. 2. Tern. Fauna Jap. 13, t. 5,/. 12, L 6,/. 4. Testudo 

 imbricata, Linn. S. N. 350. Schn. 309. Shaw, Zool. iii. t. 26, 27. 

 Baud. K ii. 39. Schoepf. t. 18, A, B. t. 17, /. 1, young. T. Ca- 

 retta, Knorr, D. ii. 124, t. 50. Chelonia multiscutata, Kuhl, 

 Beytr. 78, (monstrosity ?) Ch. pseudo Caretta, Lesson, Voy. Bet. 

 302. The scaled tortoise, Greiv, Mus. 38, t. 3,/. 4. Seba, i. t. 80, 

 /-9. 



Shell subcordiform, yellow, brown -marbled, back keeled, shelv- 

 ing, strongly toothed behind. 



a, b. Stuffed, half grown. 



c. Upper shield only, younger. 



d. Stuffed, young. 



e. Lower shield only. 



/. Stuffed, very young, (wants one fin). 



