42 HYDRASPIS, 



Emys expansa, Schw. (v. t. Mus. Par.) Emys Amaxonica, 

 Spix, t. 1. Emys tracaxa, Spix, t. 5, f. 1, 2, (3?) 



Jun. E. Amazonica, Spix, t. 2, f. 1, 2, and f. 3. 



j3. erythrocephala. Capite supra flavescente subtus fusco 

 macula flava notato, sterno postice rotundato excavate, gula 

 non cirrhosa. Emys erythrocephala, Spix, t. 7. 



Hab. in Brasilia, (v. t. Mus. Par.) 



Spix figures the egg of Emys Amazojiica, t. 2, f. 3, as 

 quite orbicular, and that of E. tracaxa, t. 5, f. 3, as oblong. 

 Kaup greatly doubts the latter eggs belonging to the species. 

 They appear more like the eggs of a land tortoise. Length 

 of shell 2 feet 7 inches, breadth 1 foot 7|- inches. 



10. Hydraspis Dumcriliana, {Di/meril's Hydraspis.) Testa 

 ovata leviter convexa nigra, scutellis disci planis, margina- 

 libus posterioribus horizontaliter explanatis ; capite globoso, 

 naso convexo Isevissimo. 



Emys Dnmeriliana, Schw. (v. t. Mus. Par.) Emys ma- 

 crocephala, Spix. t. 4. 



Habit, in Brasilia, (v. t. Mus. Par.) 

 Length of shell, 18; breadth, 14 inches. 



11. Hydraspis Cayennensis, [Cayenne Hydraspis.) Testa 

 ovata convexa tuberculato carinata, scutellis levibus flavo 

 viridibus angulis posticis nigris, nuchali nuUo, capite fusco, 

 vertice luteo trimaculato, cauda brevissima. 



Emys Cayennensis, Schw. (v. t. Mus. Par.) 

 |3 Gibha. Testa nigra, antice planata, postice tuber- 

 culato carinata. Emys gild' a, Schw. (v. t. Mus. Par.) 

 Habit, in Guiana Gallica. j3. ? 



The American Hydraspides require further examination 

 with better series of specimens than I have been able to see. 

 Spix's figures and descriptions, which do not always agree, 

 leave much to be desired. They must mostly have been made 

 from badly preserved specimens. Besides the above may be 

 noted the following, several of which will probably prove 

 synonymous with the foregoing. 



Hydraspis bitentaculata. Emys hitentaculata, Cuv. Mss. 

 (v. t.' Mus. Par.) Testa rufa, subtus pallide lutea nigro macu- 

 lata. scutello nuchah nullo. 



Hab. in Brasilia. 



