index of plates. 



Plate 55. 

 Trachetnys hilli. Carapace of type, x 0.7. No. 2425 A. M. N. H. 



563 



Plate 56. 



1. Trachetnys bisornata. Part of carapace. X 0.8. Specimen in coll. Phila. Acad. 



2. Trachetnys India. Part of epiplastra, lower surface. X 0.8. Type, No. 3934 A. M. N. H. 



Same bones, upper surface. X 0.8. 



Right hyoplastron of type. X 0.8. 



Right liypoplastron of type. X 0.8. 



Left xiphiplastron of type. X 0.8. 



Left hyoplastron forming type. X 2 / 3 . In A. M. N. H. 



3. Trachetnys India. 



4. Trachetnys irulla. 



5. Trachetnys India. 



6. Trachetnys India. 



7. Terrapene putnami. 



8. Terrapene putnami. Same bone showing lateral hinge. X 2 /z. 



Plate 57. 



1. Pscudemys ccelata. Nuchal. 



2. Pseudemys ccelata. Fifth left costal. 



3. Pscudemys eu-Iata. Left third peripheral. 



4. Pseudemys cirlala. Left tenth peripheral. 



5. Pseudemys ccelata. Left hypoplastron. 



6. Pscudemys ecelala. Left first costal of smaller individual. 



All figures slightly less than natural size. From type, No. 2508 U. S. N. M. 



Plate 58. 



1. Terrapene mamochi. Carapace, side view. X 0.625. No. 3936 A. M. N. H. 



2. Terrapene mamochi. Same carapace, upper view. 



Plate 59. 



1. Hadrianus majusculus Shell of the type. X 0.25. In Yale Univ. coll. 



2. Stylemys nebraseensis. Skull, upper side, x 1. Princeton Univ. coll. 



3. Stylemys nebraseensis. Same skull, lower side. X 1. 



4. Stylemys nebraseensis. Egg. X 1. A. M. N. H. 



Plate 60. 

 Hadrianus ems, mi. Carapace. X 0.375. No. 6027 A. M. N. H. 



Plate 61. 

 Hadrianus corsoni. Plastron. > 0375. Xo. 6027 A. M. N. H. 



Plate 62. 



1. Stylemys nebraseensis. Carapace. X 0.5. No. 1433 A. M. N. H. 



2. Stylemys nebraseensis. Plastron of same shell. X 0.5. 



Plate 63. 



1. Stylemys capax. Carapace of type. 0.28. No. 1357 A. M. N. H. 



2. Stylemys eapax. Plastron of type. 0.28. 



Plate 64. 

 1 Stylemys conspecta. Carapace of type. < 0.45. No. 1358 A. M.N. H. 



Plate 65. 



1. Testudo brontops. Carapace of type. X 0.15. In Yale Univ. coll. 



2. Testudo brontops Plastron oi type. x 0.15. 



Plate 66. 



1. Testudo thomsoni. Front (if plastron oi type, x 0.5. N0.3940A.M N . II 



2. Testudo thomsoni. Skull of type, uppei side >'- 0.8. 



