56; 



FOSSIL TURTLES OF NORTH AMERICA. 



8. Clemmys saxca. Pygal of type. X i. No. 2192 Univ. Cal. coll. 

 g. Clemmys saxca. Same bone, inner surface. X i. 



10. Clemmys saxea. Tenth left peripheral of type. X i. 



11. Echmatcmys sp. indet. Skull, upper view. X I. Princeton Univ. coll. 



12. Echmatemys sp. indet. Same skull, lower view. X i. 



13. Echmatcmys sp. indet. Same skull, right side. X i. 



14. Echmatemys mcgaulax. Neural bone. X i. No. 1184 A. M. N. H. 



15. Echmatemys mcgaulax. Peripheral bone. X i. No. 1184 A. M. N. H. 



16. Echmatcmys testudinea. Third and fourth right peripherals. X 0.8. No. 1178 A. M. N. H. 



17. Echmatemys testudinea. Sixth costal. X 0.8. No. 1179 A. M. N. H. 



PLATE 46. 



1. Echmatemys euthneta. Part of plastron. X 0.96. No. 1176 A. M. N. H. 



2. Chrysemys timida. Carapace of type. X 0.62 of natural size. No. 10853 Princeton 



Univ. coll. 



3. Trachemys petrolei. Two epiplastra of different individuals. X 0.8. Cotypes. No. 3933 



A. M. N. H. 



4. Trachemys petrolei. Nuchal bone accompanying cotypes. X 08.. No. 3933 A. M. N. H. 



PLATE 47. 



1. Echmatemys wyomingensis. Plastron viewed from above. X 0.4. A. M. N. H. 



2. Echmatemys haydeni. Plastron viewed from above. X 0.4. A. M. N. H. 



PLATE 48. 



1. Echmatemys stevensoniana. Carapace of type. X 0.4. No. 6084 A. M. N. H. 



2. Echmatemys stevensoniana. Plastron of same specimen. X 0.4. 



PLATE 49. 



1. Echmatemys arethusa. Carapace of type. X 0.5. No. 5920 A. M. N. H. 



2. Echmatemys arethusa. Plastron of type. X 0.5. 



PLATE 50. 



1. Echmatemys shaughnessiana. Carapace of type. X 0.375. No. 1069 A. M. N. H. 



2. Echmatemys shaughnessiana. Plastron of type. X 0.375. 



PLATE 51. 



1. Echmatemys naomi. Carapace of type. X }/$. No. 5975 A. M. N. H. 



2. Echmatemys naomi. Plastron of type. X y$. 



PLATE 52. 



1. Echmatemys callopygc. Carapace of type. X 0.3. No. 2087 A. M. N. H. 



2. Echmatemys callopyge. Plastron of type. X 0.3. 



PLATE 53. 



1. Echmatemys uintensis. Carapace of type. X 0.3. No. 11198 Princeton Univ. coll. 



2. Echmatemys uintensis. Plastron of type. X 0.3. 



PLATE 54. 



1. Deirochelys floridana. Nuchal forming type. X 0.8. In coll. Vanderbilt Univ. 



2. Deirochelys floridana? First costal. X 0.8. In Vanderbilt Univ. 



3. Trachemys euglypha? Nuchal. X 0.8. In Wagner Free Inst. 



4. Trachemys sculpta. Nuchal forming type. X 0.8. In coll. Vanderbilt Univ. 



5. Trachemys sculpta. Third? costal. X 0.8. In coll. Vanderbilt Univ. 

 6 and 7. Trachemys sculpta? Neural bone. X 0.8. Same coll. 



8. Trachemys sculpta? Costal bone. X 0.8. Same coll. 



9. Trachemys sculpta? Costal bone. X 0.8. Same coll. 



10. Trachemys? jarmani. Nuchal forming type. X 08. In coll. Vanderbilt Univ. 



11. Trachemys? jarmani? Right eighth peripheral. X 0.8. Same coll. 



12. Trachemys? jarmani? Proximal end of costal. X 0.8. Same coll. 



13. Pseudemys extincta. Nuchal forming type. X 0.8. Same coll. 



