INDEX OF PLATES. 



PLATE 97. 



1. Aspideretes grangeri. Carapace of type. X 0.4. No. 3942 A. M. N. H. 



2. Amy da? prisca. Proximal end of costal. X i. No. 2401 A. M. N. H. 



3. Amydaf prisca. Distal end of costal. X i. No. 2401 A. M. N. H. 



4. Amydaf prisca. Supposed part of nuchal. X i. No. 2401 A. M. N. H. 



5. Amydaf prisca. Supposed last costal. X i. No. 2401 A. M. N. H. 



6. Amydaf prisca. Portion of costal. X i. No. 2401 A. M. N. H. 



PLATE 98. 



1. Amyda ventricosa. Distal end left hypoplastron of type. X i. No. 1112 U. S. N. M. 



2. Amyda ventricosa. Distal end of left hypoplastron of another individual. X i. No. 1112 



U. S. N. M. 



3. Amyda ventricosa. Undetermined fragment of same lot. 



4. Amyda ventricosa. Distal end of costal plate of same lot. 



5. Amyda ventricosa. Portion of costal of small individual of same lot. 



6. Amyda ventricosa. Fragment of costal of same lot. 



7. Amyda concentrica. Fragment of costal of type. X i. In A. M. N. H. 



8. Amyda concentrica. Fragment of costal of type. 



9. Amyda concentrica. Fragment of costal of type. 



10. Amyda concentrica. Fragment of costal of type. 



11. Amyda lima. Portion of costal forming type. X I. In A. M. N. H. 



12. Amyda buiei. Fragment of costal. X i. In A. M. N. H. 



13. Platypcltis serialis. Left half of carapace. X i. No. 6014 A. M. N. H. 



14. Platypeltis heteroglypta. Part of middle of fifth costal of type. X i. No. 1039 A. M. N. H. 



PLATE 99. 



1. Amyda aqua. Carapace of type. X 0.31. U. S. N. M. 



2. Amyda aqua. Third neural and costal of type. X i. 



3. Amyda aqua. Portion of middle of costal. X i. 



PLATE 100. 



1. Amyda uintensis. Plastron of type. X 0.27. Coll. Phila Acad. 



2. Amyda scutumantiquum. Right hyoplastron and hypoplastron of type. X 0.5. No. 1035 



A. M. N. H. 



3. Amyda scutumantiquum. Part of first and second neurals and first and second costals 



of type. X i. 



4. Amyda scutumantiquum. Part of distal end of a costal of type. X i. 



PLATE 101. 



1. Amyda scutumantiquum. Carapace of type. X 0.3. No. 1035 A. M. N. H. 



2. Platypeltis heteroglypta. Carapace of type. X 0.38. No. 1039 A. M. N. H. 



PLATE 102. 

 Amyda francisca. Carapace of type. X 0.4. No. 5936 A. M. N. H. 



PLATE 103 

 Amyda franciscce. Plastron of type. X 0.4. No. 5936 A. M. N. H. 



PLATE 104. 



1. Amyda salebrosa. Carapace of type. X 0.3. No. 3941 A. M. N. H. 



2. Aspideretes puercensis. Right hyoplastron and hypoplastron. X 0.6. No. 1202 A. M. N. H. 



3. Aspideretes puercensis. Portion of right xiphiplastron of type. X 0.6. 



4. Axestemys byssina. Left xiphiplastron. X 0.43. U. S. N. M. 



PLATE 105. 



1. Amyda mira. Carapace of type. X 0.5. No. 6130 A. M. N. H. 



2. Temnotrionyx manducans. Part of right maxilla of type, side view. X i. No. 5929 



A. M. N. H. 

 %. Temnotrionyx manducans. Same maxilla, showing grinding surface. X i. 



