68 



CATALOGUE OF SHIELD REPTILES. 



I. Very young (stuffed). Lidia. Capt. Boys' Collection. 



m. Adult (stuffed). The first vertebral bone united to the 

 other, forming one disk. Head with seven black di- 

 verging rays. Lidia. Capt. Boys' Collection. 



" Very yoimy : above olive-green ; the head and upper 

 part of the neck with numerous small white spots, becoming 

 larger and more distant on the cheeks and cliiu ; on the 

 vertex two round black spots, on the occiput two diverging 

 black lines. The shell with several large black, white- 

 ringed spots, between which numerous smaller indistinct 

 white spots ; margin pale white ; several longitudinal ridges 

 composed of close minute tubercles : beneath greenish- 

 white. Older : above uniform olive green ; the longitu- 

 dinal ridges of the shell consist of tubercles more distant 

 and proportionally smaller than in the young." — Cantor. 



This species is numerous in ponds and rivers in Pinang. 

 The largest that Dr. Cantor observed measured as follows : 

 — Head 2^ ; neck 2} ; shell C|^ inches ; tail | of an inch 

 Ijug. Eaten by the Chinese. 



** African. 

 7. Trionyx Niloticus. The Tyrse. 



Shell rather convex, vertebral line often depressed ; back 

 green, spotted with white or yellowish. Callosities 4, far 

 apart, lateral, dilated internally, hinder triangular ; first and 

 second vertebral bones united by a smooth suture. 



Tyrse Nilotica, Gray, Cat. Tort. B.M. 48. 

 Trionyx Niloticus, Gray, Syn. 46. 



Schleyel, Faun. Japan. 32. 

 Testudo triunsuis, Forsk. 9. 



Gmel. Syst. Nat. 1039. 

 Trionyx JEsvptiacus, Geoff. Egypt, i. 116. t. 1. 



Schit-eTg. Prod. 286. 



Merreni, Amph. 20. 



Gner. Icon. t. 1. f. 7. 

 Gymnopus jEgyptiacus, Dum. ($■ Bib. Erp. Gin. ii. 484 ; 



'Cat. Meth. it. 22. 

 Trionyx labiosns. Bell. Test. t. , from life. 

 Emys sen Erais, Aristot. Hist. Anim. v. 9. 

 Aspidonectes ^Egyptiacus, Fit:. Syst. Rept. 30. 

 Le Tyrse ou Tortue molle du Nile, Ciiv. R. A. ii. 15. 



Ilah. North Africa; Nile; Egypt; Abyssinia; W.Africa. 



a. Adult (stuffed). Anterior dorsal plate luiited to the 



others. Egypt. Presented by Turnbull Christie, 

 M.D. 



c. Half-grown (in spirits). Brown, with small white specks 

 on shields and body, with some series of rather larger 

 specks. G. JNIassam, W. Africa. 



b. Very young (stuffed). Egyjit. Presented by Turnbull 



Christie, M.D. 



/. Young (in spirits). W. Africa. Mr. Rich's Collection. 



d. Half-grown (stuffed). Anterior dorsal plate scarcely 



united. Egypt. From the Zoological Society. 



e. Adult (stuffed). Egypt. Mr. Thornton's Collection. 



Osteology. Tab. XLIIL fig. 2, skull. 



Trionyx labiosus. Bell, Testudiaata, t. , dorsum and 



sternum. 



y. Skeleton (mounted). Egypt. Dr. Riippell's Collection. 



h. Skeleton (mounted) of smaller animal. From the Zoo- 

 logical Society. 



8. Trionyx Argus. The Eyed Tyrse. 



Olive-black, with numerous pale-edged, narrow, black 

 rings. Head and feet marbled with black, with a black- 

 edged yellow streak from the tip of the nose to the ear, 

 enclosing the eye ; lips yellow, black-edged ; nuchal bone 

 transverse, separate. Sternal callosities 4 ; hinder ones 

 rather distant ; anterior vertebral bone broad, with two pits 

 in the suture. 



Tyrse Argus, Gray, Cat. Tort. B.M. 48 ; Knowsley Me- 

 nag. t. 



a. Half-grown (stuifed). West Africa ; Sierra Leone ? 

 Presented by the Earl of Derby. 



Consult — Trionyx Mortoni, Hallowell in Proc. Acad. Sci. 

 Phi/ad. ii. 120. Ilab. Africa. 



*** American. 

 9. Trionyx ferox. The Fierce Trionyx. 



Thorax very depressed, with a series of spinous tubercles 

 on the front edge of the back. Head with a dark-edged 

 streak from nostril across the eyes to the temples. A con- 

 tinued longitudinal central series of keeled spines on the 

 hinder part of the back, and other smaller series of smaller 

 tubercles. 



Trionyx ferox, Leconte, Ann. Lye. N. Y. iii. 93 (1830). 



Merreni, Tent. 20. 



Gray, Ann. Phil. x. 212 ; Syn. 43. 



Say, Joiirn. Acad. Philad. ii. 203. 



Schlegel, Faun. Japan, t. 5. f. a, head. 



Schweig. Prad. 285. 

 Testudo ferox, Penn. Phil. Trans. Ixi. 266. t. 10. f. 5. 



Schneid. Schildk. 330. 



Schoepf. Test. t. 19. 



Shaw, Zaal. iii. 64. t. 17. f. 1. 

 La Molle, Lacep. Q. O. i. 137. t. 7. 

 Trionyx Georgicus, Gcaff'. Ann. Mus. xiv. 7. 

 Trionyx spiniferus, Lesueur, Mem. Mus. xv. 258. t. 15. 



ilolbraak, X. A. Ilerpet. ed. 2. ii. 11. t. 1. 



Be Kay, New York, 6. t. 6. f. 11. 



