REPTILIA. 319 



Amphib. Tab. 3, figs. 25, 26; compare PETEBS in MUELLEB'S Archiv. 

 1839, Tab. XIV. figs, i 4, figure of the skull. This species and most 

 others of this sub-genus are met with in South America. Some others are 

 from Africa, and some from New Holland, as Emys longicollis, Chelodina 

 longicollis GBAT, DUM. and BIBB. Erptt. n. PI. 21, fig. 2. 



(Note. Sub-genera Pentonyx DUM. and BIBB., and Sternotherus BELL, 

 are distinguished by five nails of hind feet.) 



H* Neck retractile under the shell between the fore feet. Pelvis not con- 

 joined with sternum. 



Chelydra SCHW., WAGL., Emysaurus DUM. and BIBB. Sternum 

 small, narrow at the middle part, cruciform, immoveable. An- 

 terior feet with five nails, posterior with four. Tail elongate, 

 crested. 



Sp. Emys serpentina MEBB., Testudo serpentine L., SCHCEPFF 1. L Tab. 6, 

 DUM. et BIBB. Erpet. PL 17, fig. i; North America, in lakes and rivers; 

 the dorsal shield with three keels, excised behind, and with three points on 

 each side. 



Staurotypus WAGL. 



Sp. Emys odorata SCHWEIGG., Testudo odorata DAUD. Tab. 24, fig. 3, 

 SCHOBPFF, Tab. 24, fig. B. 



Cinostemum SPIX, WAGL. Anterior part of sternum moveable, 

 with middle part immoveable, posterior obscurely moveable. 



Sp. Emys scorpioides (and Emys Retzii) SCHW., Testudo scorpioides L. 



Cistuda FLEMING, Emys WAGL. (Terrapene MEEK, in part). 

 Sternum divided by transverse suture into two moveable parts, 

 capable of being drawn towards the dorsal shell when the animal is 

 retracted. 



Sp. Emys Carolina (Testudo Carolina L. ?), Testudo clausa GMEL., SCH<EPFF 

 1. 1. Tab. 7, Cuv. R. Ani., $d. til., Rept. PI. 4, fig. 2, North America, 

 Cumberland River, Tennessee ; BLOCH has described this tortoise under the 

 name of Dosen-Schildkrote, Schriften der Gesellsch. naturf. Freunde zu 

 Berlin, vn. p. 131 ; Emys Europcea SCHW., Testudo orbicularislj., Testudo 

 lutaria SCHN., GMEL., LAC. Quadr. ovip. I. PI. 4, 6, SCH<EPFF 1. 1. Tab. I. 

 Bo JANUS 1. 1. Tab. I. ; dorsal shield black, with interrupted light yellow 

 stripes; this species occurs in the south and east of Europe; the shell is 

 capable of closing like a box less perfectly than in the preceding species. 



Emys DUM. and BIBR., Clemmys WAGL. Sternum immoveable, 

 broad. 



Sp. Emyspicta SCHW., SCHCEPFF 1. 1. Tab. 4, Cuv. R. Ani., td. HI, Rept. PI. 

 4, fig. i ; from North America, as are most of the species of this sub-genus. 



