EXPLANATION OF THE PLATES. V 



Pig. 5, Dorsal vertebra, referred in the text to Liodon lamis, but probably a Olidastes to be called C. anthalidus, 

 Cope (Proceed. Bost. Soc. N. Hist., 1870, December), scon from the side ; 5a, from below ; 56, from behind. One- 

 half natural size. 



Pig. (!. Fragment of ramus mandibuli of Thecacliampsa sicaria, Cope, lateral view ; (i«, superior view ; one-half 

 the natural size. 6J, apex of the crown of one of the teeth, natural size. Specimens in possession of Philip T. Tyson, 

 Baltimore, Maryland, from the month of the Patuxent River, Md. 



Pig. 7. Crown of the tooth of Theeachampsa sericodon Cope, from Charles County, Md. Natural size. 



Fig. 8. Tooth of the same species, from Shiloh, Cumberland County, N. J. Natural size. 



PLATE VI. 

 Cranium of Euclasies plaiyops Cope. Prom above. A little smaller than natural size. From Ilurffvillc, N. J. 



PLATE VII. 



Fig. 1. lfyostcrnal bones of Adocus pectoralis. From Medford, N. J. One-half natural size. 

 Fig. 2. Catapleura repanda. One-half natural size, a, nuchal, with first to middle of fourth marginal bones 

 of the right side ; 6, sixth marginal ; e, eighth and part of ninth right marginals. 



Fig. 3. Osteopygis ernarginatus. One-half natural size, a, nuchal with first loft marginal, and parts of both 

 first costals ; b, fifth left marginal ; c, tenth left marginal ; d, anterior vertebral. From Barncsboro, N. J. 



Fig. 4. 1'ropleura iopita. One-half natural size, a, nuchal, first marginal and first costal, broken ; b, third and 

 fourth left marginals; c, fifth left marginal; d, eleventh left marginal bone; e, humerus, anterior view;/, do., 

 lateral view ; g, femur, anterior, and A, lateral views. 



Fig. 5. Two costal bones of the same individual, one-half natural size. 



Carpal bono of another individual (from Harrison ville, N. J.). Natural size. 

 Proximal phalanges of fore-foot of the last individual. A lateral view. 

 ?Tcnth right marginal of Osteopygis ehelydrinus. Natural size. 



Euclasies platyops. Profile of cranium. One-half natural size. (The artist has depressed the occipital 

 profile too much.) 



Fig. 10. Metatarsal of Stylemys nebrascensis. Natural size. 

 Left pubis of the same. Natural size. 

 Right humerus of the same individual. Natural size. 

 Trionyx pennatus. Costal bone ; distal extremity. One-half natural size. 

 Trionyx lima. Costal bone ; distal extremity. One-half natural size. 



Trionyx halophilus. Vertebral and proximal portion of costal bone. One-half natural size. From 

 Summit Bridge, Delaware. 



Fig. 10. Nuchal, and first and second marginal bones of Taptrosphys molops. From Barnesboro. One-third 

 natural size. 



Fig. 0. 



Fig. 7. 

 Fig. 8. 

 Fig. 9. 



Fig. 11. 

 Pig. 12. 

 Fig. 18. 

 Fig, 14. 

 Fig. 15. 



Fig. 1. 

 Fig. 2. 

 Fie. 3. 



PLATE VIII. 



Femur of Laelaps aquilunguis, Cope. External view. One-fourth natural size. 1 a, same, anterior view. 

 Caudal vertebra of the same, lateral view. One-half natural size. 2 a, same, anterior view. 

 Anterior caudal vertebra of the same, from above. One-half natural size. 



