NATURAL SCIENCES OP PHILADELPHIA. 579 



C. arata, C. Miocene Foss. 11, 6, 2. 



Cardita arata, Tuomev and Holmes, Plioc. Foss. S. C. 65, 19, 4, 5. Emmons, 

 Geol. N. C. 302, 234. 

 C. carinata, C. Proceed. A. N. S. 1, 305. Miocene Foss. 65, 37, 1. 



Cardita pseudo- carinata, D'Orbig. Prodrom. iii. 114, 2133. 



Cardita carinata, Tuomey and Holmes, Plioc. Foss S. C. 67, 19, 10. 

 C. protraeta, C. Proceed. A. N. S. i. 37, 2. Miocene Foss. 65, 37, 2. 



Cardita protracta, D'Orbig. Prodrom. iii. 114, 2134. 



MYTILIDJE. 



PERNA, Adans. MODIOLA, Lam. 



P. (Modiola) spinigera, H. C. Lea, Trans. Amer. Philos. Soc. ix. 244, 35, 30. 



P. (Modiola) Ducatellii, C. Miocene Foss. 53, 28, 2. 



P. (Mjtilus) inflata, Tuomey and Holmes, Plioc. Foss. S. C. 33, 14, 3. 



MYTILICONCHA, Conrad. 



M. (Myoconcha) incurva, C. Miocene Foss. 52, 28, 1. 



M. incrassatus, C. Sillim. Journ. xli. 247. Tuomey and Holmes, Plioc. Foss. 

 S. C. 32, 14, 1, 2. Emmons, Geol. N. C. 283, 203a. 

 Mi/tilus Conradinus, D'Orbig. Prodrom. iii. 127. 



CRENELLA, Brown. 

 C. (Nucula) fequilatera, H. C. Lea, Trans. Amer. Philos. Soc. ix. 243, 34, 27. 



STALAGMIUM, Conrad, 1833. 

 S. . A minute species occurs at Yorktown (specimen lost). 



AVICULA. 

 A. multangula, H. C. Lea, Trans. Amer. Philos. Soc. ix. 245, 35, 31. 



ISOGNOMEN, Klein. PERNA, Brug. 



1. (Perna) torta, Say, Sillim. Journ. ii. 38. 



Perna maxillata, C. (not Lam.,) Miocene Foss. 51, 27. 

 P. Conradii, D'Orbig. Prodrom. iii. 127. 



TRIGONIIDJE. 



VERTICORDIA, Wood. 



V. Emmonsii, C. Emmons, Geol. N. C. 286, 206. 



ARC ID, E. 



SCAPHARCA, Gray. 



S. (Area) arata, Say, Journ. A. N. S. iv. 10, 1. C. Miocene Foss. 58, 30, 6. 

 S. (Area) aequicostata, C. Miocene Foss. 60, 31, 6. Tuomey and Holmes, Plioc. 



Foss. S. C. 44, 16, 3, 4. 

 S. (Area) callipleura, C. Miocene Foss. 54, 29, 2. 

 S. (Area) idonea, C. Foss. Shells of Tert. Form. 15, 1, 5. Miocene Foss. 55, 29, 



3. Emmons, Geol. N. C. 285. 

 S. (Area) incongrua? Say, Tuomey and Holmes, Plioc. Foss. 45, 16, 5, 6. 

 S. (Area) improcera, C. Miocene Foss. 60, 31, 5. Tuomey and Holmes, Plioe. 



Foss. S. C. 41, 15, 4, 5. 

 S. (Area) lineolata, C. Miocene Foss. 61, 32, 3. 



A. sublineolata, D'Orbig. Prod. iii. 125. 

 S. (Area) lienosa, Say, Amer. Conch, pi. 36. Tuomey and Holmes, Plioc. Foss. 



S. C. 40, 15, 2, 3. Emmons, Geol. N. C. 284, 204. 

 S. (Area) plicatura, C. Miocene Foss. 61, 32, 4. 



1862.] 



