PLATE XXII. 



Page. 



Tenea pinguis Conrad 163 



Fig. 1. Left view of an internal cast. 



2. Cardinal view of the same. 



3. View of the hinge, enlarged twice, from Mr. Conrad's typo, Haddonfield, N. J. 



DOSINIA Gabbi Whitfield Kil 



Fig. 4. Left view of a cast, showing all the fcatnres recognized. 

 5. Cardinal view of the same. 



Aphrodina Tippana Conrad I.'i4 



Fig. 6. Cast of a large right valve. Deep cut, Hohndcl and Kiyport Turnpike. 

 7. A smaller left valve from Marlborough, N. J. 



Caixista Delawarensis Gabb 153 



Figs. 8 and 9. Views of what is suppo.sed to be Mr. Gabb's type of the species. 



10. View of a young specimen, retaining tlie shell, from nodule iu Lower Marls at 

 Holmdcl. 



Cyprimeria depressa Conrad ISG 



Fig. 11. Interior of a shell from Haddonfield. One of Conrad's originals. 



12. Exterior of the same. 



13. View of a cast from l''reehold ; a shorter form. 



Cyprimeria Heilprini Whil field ItO 



Figs. 14 and 15. Views of the type .specimens. Collection of Academy of Natural Sciences. 

 Cyprimeria excavata Morton 1.'9 



Figs. 16 and 17. Views of a very imperfect cast referred to this species. Freehold, N. J. 

 Cyprimeria spi.ssa Conrad 160 



Fig. 18. View of a cast of a right valve refernd to this species. 

 Cypki jieria densata Conrad 157 



Fig. 19. View of a specimen from Freehold, N. J., retaining the shell in part. 

 90 and 21. Views of Mr. L'onrad's type specimeu. 



3 12 



