CATALOGUE OF SHIELD REPTILES. 



57 



rather elevated, margin very much expanded, deeply ser- 

 rated behind ; beneath, yellow brown-rayed and varied. 

 Sternum narrow, rather broader in front, attenuated and 

 deeply acutely lobed behind. Head brown, moderate, with 

 two subtrigonal hard occipital shields, and small shields on 

 the temples ; chin two-bearded ; neck warty, yellow be- 

 neath, with a yellow streak on each side, from the angle of 

 the mouth and under the ear ; claws elongate, acute, com- 

 pressed. 



Phrynops Bellii, Gray, Cat. Tort. B.M. 41. 

 Hah. ? Mus. Bell : a young specimen. 



11. Hydi'aspis Gaudichaudii. Gaudichaud's IIydraspis. 



Shell oval, oblong, truncated in front, rounded behind, 

 keelless, brown marbled with black, and with yellow spots 

 on the outer edge of each marginal shield. Sternum black 

 in the middle, orange on the sides. Head large ; under 

 part of the neck orange, marbled with brown. 



Hydraspis Gaudichaudii, Gray, Cat. Tort. B.M. 40. 

 Platemys Gaudichaudii, Duin. ^ Bib. Erp. G6n. ii. 427 ; 

 Cat. Mefh. R. 20. 



Hab. Brazils. Mus. Paris (one very young specimen). 



12. Hydraspis Hilaii-ii. St. Hilaire's Hydraspis. 



Shell rather convex, pale brown, short, oval, narrowed at 

 each end ; shields smooth ; vertebral broad, each furnished 

 with a keel-hke tubercle. Sternum yellow, black-spotted. 

 Head depressed, subsquamose, muzzle short, round. 



Hydraspis Hilairii, Gray, Cat. Tort. B.M. 40. 

 Platemvs Hilairii, Bum. 4'- Bib. Erp. Gin. ii. 429 ; Cat. 

 Mm. R.21. 



Hab. Brazils. Mus. Paris. 



13. Hydraspis afflnis. The Allied Hydraspis. 



Shell brown, obscurely black-rayed, margin strongly re- 

 flexed over the hinder feet ; two last verteljral shields with 

 an elevated compressed conical ridge. Neck long, black, 

 with a yellow line on each side, "beneath yellowish. 



Hydraspis? affinis. Gray, D. C. 22. no. 10, ined. ; Cat. 

 Tort. B.M. 41. 



Hab. BrazUs. Mus. Berlin. 



14. Hydraspis Geoffiroyaaa. Geoffroy's Hydraspis. 



Shell oval, oblong (of the same width at the two ends), 

 rounded before, obtusely angular and nicked behind ; ver- 

 tebral plates forming a gutter on each side of the tubercular 

 keel. Body yellowish, spotted and rayed with brown, be- 



neath yellow. Head with small scales ; occipital and 

 superciliary shields elongated. 



Hab. South America ; Buenos Ayres. Mus. Paris, two 

 specimens, young and old. 



5. CHELYMYS. 



Head and tem])le covered with a smooth skin. Beaks 

 naked, horny, strong. Chin not bearded. Neck not 

 warty. Shell convex, solid, expanded behind ; side edges 

 narrow, rather revolute ; nuchal shield distinct ; front 

 cavity much contracted by two rather diverging septa, only 

 leaving a space half the width of the outer opening ; verte- 

 bral column sharply keeled within. Sternum sohd, narrow, 

 with broad and shelving side wings, and a broad rounded 

 notch behind. Claws 5 • 4, acute. Australia. 



Chelymys, Gray, Cat. Tort. B.M. 41 (1844). 

 Emydura, Bonap. Tab. AnaJyt. 8 (1836). 

 Platemvs, sp.. Bum. ^- Bib. Erp. Gen. ii. 438 ; Cat. Meth. 

 R. 2"l . 



1. Chelymys Macquaria. The Victoria Chelymys. 



Shell ovate, convex, blackish-brown marbled with grey, 

 and rather rugose above, with sligttly impressed, narrow, 

 netted grooves ; beneath convex, yellow ; vertebral plates 

 nearly square, the fourth six-sided, elongate ; the marginal 

 plates rather narrow in front, broader and slightly bent 

 upon the sides, dilated, rather produced, and leaving two 

 or three notches over the tail behind. 



Chelymys Macquaria, Gray, Cat. Tort. B.M. 42. 

 Emys Macquaria, Cuv. R. A. ii. 11. 

 Hydraspis ^lacquaria. Gray, Syii. 40. 

 Platemvs Macquaria, Bum. ^' Bib. Erp. Gen. ii. 438 ; Cat. 

 Meth.R.2\. 



Grey, Trar. TT'. Austr. ii. 445. 

 Hydraspis Victori<E, Gray, Zool. Misc. 55. 

 H. australis. Gray in Grey, Trap. TV. Austr. ii. 445. t. 6. 

 Emydura Macquaria, Bonap. Tab. Analyt. 8 (1836). 



Hab. Australia. 



Var. 1 . High, convex. 



b. Half-grown (stuffed). Shields smooth ; vertebral rather 

 broader than long ; hinder lateral marginal plates 

 square. Australia. Presented by J. Gould, Esq. 



Hydraspis australis. Gray in Grey, Travels TF. Austr. ii. 

 445. t. 6. 



Osteology : — 



a. Adult (shell only). Back with a verv narrow, slightly 

 sunk, interrupted vertebral line; shield partly rugose ; 

 vertebral ])lates rather longer than broad. Victoria 



