TORTOISES. 43 



6. Chelodina, Gray. Chelodina part, Dum et Bib. 



Head elongate. Neck very long, covered with a thin skin. 

 Jaws exposed. Claws 4-4. Shell depressed, hroad, shields thin, 

 smooth. Sternum very broad, rounded in front, nicked behind. 

 Intergular plate large, long, 6-sided, placed in the angle between 

 the gular and humeral plates. Nuchal plate distinct. Australia. 



The Yellow Chelodine. Chelodina longicollis, Gray, Syn. 

 R. 39, t. 6,f. 2. Griffith, An. K. t. — Grey, Trav. Austr. ii. 445. 

 Testudo longicollis, Shaw, N. Holi. 19, t. 7, and Gen. Zool. iii. 

 62, t. 6. Lacep. Ann. Mm. iv. 189. Schweig. Prodr. 309, n. 28. 

 Schlegel, F. Jap. 43. Bell, Zool. Journ. iii. 512. Chel. Novas Hol- 

 landis, Dum. et Bib. E. G. ii. 445. Emys porphyrea, Daud, Rep. 

 ii. 142. 



Shell oblong, depressed, brown ; first vertebral shield elongate ; 

 the second and eleventh marginal shields with their front edge op- 

 posite the suture of the costal shields ; sternum flattish, deeply 

 nicked behind, yellow, shields black-edged. 



a. Animal dry, depressed, oblong. Australia. Presented by Sir 



Joseph Banks. The specn. described by Shaw, Schweiger &c. 



b. Stuffed, more ovate and convex, 7 inches by 6. Australia. Pre- 



sented by J. Gould, Esq. 



The Oblong Chelodine. Chelodina oblonga, Gray in Grey, 

 Tr. Aust. ii. 446, t. 7. 



Shell oblong, rather contracted in front, with a broad impressed 

 vertebral groove, olive brown, with irregular anastomosing lines, 

 beneath yellowish ; marginal plates longer than broad, second lar- 

 ger than the first or third, and rather angularly produced in the 

 middle of the inner edge, which is opposite the suture of the costal 

 plates ; sternum high, flat, strongly and sharply keeled on the sides; 

 neck warty, very thick. 



a. Adult, stuffed. W. Australia. Presented by J. Gould, Esq. 



The specimen figured. 



b. Adult, stuffed. Port Essington. Presented by Capt. W. Cham- 



bers, R.N. 



c. Very youug, in spirits; the body scarcely larger than the head, 



shell not solidified. VV. coast of Australia. Presented bv 

 John Richardson, M.D. 



7. Hvdromedusa, Wagler. Chelodina part, Dum. et Bib. 



Head elongate, depressed, covered with a soft dotted skin. 

 Jaws narrow, exposed. Lips rather dilated and fleshy at the angle 

 of the mouth. Chin not bearded. Neck warty. Claws 4-4; outer 

 toes on each foot small, clawless. Tail elongate. Shell oblong, 

 depressed, expanded in trout, slightly revolute on the sides. Nu- 

 chal plate large behind the marginal plate like a sixth vertebral. 

 Intergular plate large, long, marginal. Tropical America. 



