EXPLANATION OF THE FIGURES. 



PLATE IX. 



FtCt. 1. — Ventral view of the shell of Emys meleagris. 



Fig. 2.— Dorsal view of the shell of Chrysemys marginata: a, 

 dorsal plaies; b, costal plates; c, marginal plates; d, nuchal plate. 



Fig. 3. — Ventral view of the shell of Cliryf^emys marginata : a, 

 ^ • plate; h, postgular plate; c, pectoral plate; d, abdominal plate; 

 e, i atial plate;/, anal plate; g, axillar plate; h, inguinal plate. 



1 IG. 4. — Ventral view of the shell of Aromochelys odoratus. 



PLATE X. 



Fig. 5.— Ventral view of the shell of Chelydra serpentina. 



Fig. 6,— Right ramus of mandible of Malacoelemmys geo- 

 graphicus. 



Fig. 7. — Right ramus of mandible of M. lesueuri. 



Fig. 8. — Ventral view of the skull of M. geograpMcus : mx 

 maxilla; -y vomer; pZ, palatine bone. 



Fig. 9.— Ventral view of the skull of M. lesueuri. Same bones, 

 outlined as in Fig. 8, 



PLATE XI. 



Fig. 10.— Feet of Cistudo Carolina: a, fore foot; h, hind foot. 

 Fig. 11.— Feet of Chrysemys marginata : a, fore foot; h, hind foot. 

 Fig. 12. — Feet of Emgs meleagris : a, fore foot; 6, hind foot. 



PLATE XIL 



Fig. 13. — Aspidonectes spinifer, dorsal view. 

 Fig. 14. — The same, ventral view. 



PLATE XIII. 



Fig. 15. — Ventral view of the head of Elaphis obsoletus : I, in- 

 fralabials; m, submentals; 7i, ventrals. 



Fig. 16.— Dorsal view of the head of E. obsoletus: a, rostral 

 plate; 6, internasal; c, prefrontal; d, frontal; e, supraorbital; /, parie- 

 tal; 0. dorsals. 



Fig. 17.— Lateral view of the head of E. obsoletus: 5^, nasals; 

 h, loreal; i, anteorbital; j, postorbitals; A-, supralabials; Z, infralabials; 

 0, dorsals. 



