s6 7 



INDEX OF PLATES. 



Plate 97. 



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



2. Amydaf prisca. Proximal end of costal. X 1. No. 2401 A. M. N. H. 



3. A my da? prisca. Distal end of costal, x 1. No. 2401 A. M. N. H. 



4. Amydaf prisca. Supposed part of nuchal. X 1. No. 2401 A. M. N. H. 



5. Amydaf prisca. Supposed last costal. X 1. No. 2401 A. M. N. H. 



6. Amydaf prisca. Portion of costal. X 1. No. 2401 A. M. N. H. 



Plate 98. 



1. Amyda ventricosa. Distal end left hypoplastron of type. X 1. No. 11 12 U. S. N. M. 



2. Amyda ventricosa. Distal end of left hvpoplastron of another individual. X 1. No. 1 1 12 



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 1. 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 1. In A. M. N. H. 



12. Amyda buiei. Fragment of costal. X 1. In A. M. N. H. 



13. Platypeltis serialis. Left half of carapace. X 1. No. 6014 A. M. N. H. 



14. Platypcltis heteroglypta. Part of middle of fifth costal of type. X 1. No. 1039 A. M. N. H. 



Plate 99. 



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



2. Amyda aqua. Third neural and costal of type. X 1. 



3. Amyda aqua. Portion of middle of costal. X 1. 



Plate 100. 



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



2. Amyda scutumantiquum. Right hycplastron 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 1. 



4. Amyda scutumantiquum. Part of distal end of a costal of type. X 1. 



Plate 101. 



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



2. Platypcltis 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 francisca. Plastron of type. X 0.4. No. 5936 A. M. N. H. 



Plate 104. 



1 . A myda 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 1. No. 5929 



A. M. N. H. 

 }. Temnotrionyx manducans. Same maxilla, showing grinding surface. X 1. 



