PLATE XXIV. 



Pholad* mya occidentalis Morton f-~r 



Fig. I. View of a Jarge specimen from Monmouth, N. J., in the American Museum Natural 

 History, New York City. 

 iJ. Anterior profile of the same. 

 Vu Cardinal view of an imperfect specimen from Burlington, N. J. 



Pholadomya Eoemeri Whitfield -.^g 



Fig. 4. View of the best preserved individual observed. 



Pa%"Opea decisa Conrad j^. 



Fig. 5. View of a cast of medium size, showing the usual form. 



6. View of a larger cast from Burlington, N. J., in the collection of the American 



Museum of Natural History. 



7. Cardinal view of a cast from Holland, Monmouth County, New Jersey. 



8. View of the interior of the hinge as obtained from a gutta-percha cast from the 



preceding specimen. 



316 



