566 



FOSSIL TURTLES OK NORTH AMERICA. 



PLATE 



1. Conchochelys admirabilis. Skull of type, view from above. X y 3 . No. 6090 A. M. N. H. 



2. Conchochelys admirabilis. Same skull, seen from below. X 1/3. 



3. Conchochelys admirabilis. Same skull, seen from right side. X 1/3. 



4. Helopanoplia distincta. Fragment of costal type. X i. U. S. N. M. 



5. Hclopanoplia distincta. Portion of plastral bone of type. X i. U. S. N. M. 



6. Aspideretes coalescens. Fragment of costal. X i. Shows the sculpture. From photo- 



graph furnished by L. M. Lambe. 



7. Aspideretes splcndidus. Portion of distal third of second costal of type. X i. No. 3952 



A. M. N. H. Shows character of sculpture. 



8. Aspideretes splendidus. Portion of distal end of fourth costal of type. X i. 



9. Aspideretes splcndidus. Portion of proximal half of third costal. X i. 



PLATE 89. 



1. Aspideretes foveatus. Carapace. X 0.5. From photograph by L. M. Lambe. Specimen 



in coll. Geol. Surv. Canada. 



2. Aspideretes foveatus. Right hypoplastron. X i. From drawing by L. M. Lambe. Speci- 



men in coll. Geol. Surv. Canada. 



PLATE 90. 



1. Aspideretes coalescens. Carapace. X 0.25. From photograph by L. M. Lambe. Speci- 



men in coll. Geol. Surv. Canada. 



2. Aspideretes beecheri. Carapace. X J<J. No. 2358 U. S. N. M. 



PLATE 91. 

 Aspideretes splcndidus. Carapace of type. X 0.28. No. 3952 A. M. N. H. 



PLATE 92. 



1. Aspideretes beecheri. Carapace and part of neck, limbs and tail of type. X 0.25. Speci- 



men in Yale Univ. coll. Photograph by Wieland. 



2. Aspideretes beecheri. Plastron of type. X 0.25. Photograph by Wieland. 



PLATE 93. 



1. Aspideretes sagatvs. Carapace of type. X ^. No. 1201 A. M. N. H. 



2. Aspideretes sagatus. Portions of neurals and costals, to show sculpture. X i. From type. 



3. Aspideretes sagatus. Distal portion of a costal. X i. From type. 



PLATE 94. 



1. Aspideretes puercensis. Carapace of type. X 0.5. No. 1202 A. M. N. H. 



2. Aspideretes puercensis. Portion of first costal of type, taken near center. X i. 



3. Aspideretes puercensis. Portion of proximal end of third costal of type. X I. 



PLATE 95. 



1. Aspideretes cllipticus. Carapace of type. X 0.4. No. 1117 A. M. N. H. 



2. Aspideretes cllipticus. Portion of fifth neural and of fifth and sixth costals of type. 



X i. To show character of sculpture. 



3. Aspideretes ellipticus. Portion toward distal end of fifth costal of type. X i. 



PLATE 96. 



1. Aspideretes beecheri. Portions of two costals of type, to show sculpture. X i. 



2. Aspideretes beecheri. Portion of costal to show sculpture. X i. No. 2358 U. S. N. M. 



3. Aspideretes vagans. Type fragment of costal. X i. No. 1847 A. M. N. H. 



4. Amydaf halophila. Neural and part of costal of type. X i. No. 1476 A. M. N. H. 



5. Amyda? halophila. Fragment of costal. X i. No. 1476 A. M. N. H. 



6. Amydaf pcnnata. Costal forming type. X i. No. 1165 A. M. N. H. 



7. Amydaf rirginiana. Portion of costal of type. X I. In coll. Maryland Geol. Surv. 



8. Amydaf I'irginian'i. Second portion of costal of type. X i. In coll. Maryland Geol. Surv. 



