44 REPTILES. 



Prince Maximilian's Hydromedusa. Hydromedusa Max- 

 imiliana, Wagler, Sys. 135, t. 3, /. 35, 42. Peters, Muller, Arch. 

 Anat. et Phy's. 1839, t. 14, skeleton. Emys M. Mikans, Delect, i. 

 Dum. el Bib. E. Gen. ii. 449. Gray, Syn. 42. 



Shell oval, entire, rounded in front, rather angular behind, pale 

 brown, black spotted ; nuchal plate as large as the first vertebral, 

 the fourth costal and two last dorsal shields, protuberant ; fore- 

 head flat ; throat yellow, brown marbled. 



a, b. Half grown and young, in spirits. Brazils. From M. P. 

 Clausen's collections. 



The Yellow-lipped Hydromedusa. Hydromedusa flavila- 

 bris. Chelodina flavilabris, Dum. et Bib. E. G. ii. 446. 



Shell elongate, oval, entire, rounded in front, rather angular 

 behind; nuchal plate rather narrower than the first vertebral; fore- 

 head convex ; jaws bright yellow. 



Inhab. Brazils. Mus. Paris, (1 specimen). 



8. Chelys, Datid. Matamata, Merrem. 



Head flat, broad, fringed with warty appendages. Eyes small. 

 Nose elongated into a tubular proboscis. Mouth roundish. Jaws 

 covered with soft lips, lower jaw elevated behind. Tongue-bone 

 very complicated, [Cue. Oss. Foss. v 1. 1.). Neck thick, flat, long, 

 bearded at each side. Legs scaly. Tail short, warty. Shell ovate, 

 convex, broader before, acutely 3-keeled, flattened in the middle 

 of the back. Shields thin, angularly gibbous. Sternum narrow, 

 broader and rounded in front, narrower and bifid behind. Inter- 

 gular plate marginal. South America. 



The Matamata. Chelys Matamata, Gray, Sun. 431. Dum. 

 et Bib. E. G. ii. 455. Testudo Raparara, Ferm. H. N. A. Equin. 

 51. Test, fimbriata, Schn. Schildk, 349. Gmel. S. N. i. 1043. 

 Sckoepf. Test. 97, t. 21. Shaw, Zool. iii. 70, t. 18. Schiveig. Prod. 

 294. Spix, Braz. t. 11. Wagler, 134, t.3,f. 4,24. Merrem, T.21. 

 T. Matamata, Brug. Jour. H. N. 1792, 253, U3. Latr. R. i. 9, t. 

 4,f. 1. Schlegel, F. Jap. 41. Daud. R. ii. 86, t. 20, /. 1. 



Shell oblong, shields elevated, acute, forming three keels. 



a, b. Adult, stuffed. S. America. 



9. Peltocephalus, Dum. et Bib. 



Head large, subquadrangular, pyramidical, covered with six 

 large, thick, rather imbricate plates. Jaws naked, very strong, 

 hooked, toothless. Eyes lateral. Feet slightly webbed, with two 

 large scales at the claws. Claws straight, strong. Tail clawed. 

 Shell ovate, convex. Nuchal plate none. Sternum solid. 



