Catalogue of the Mollusca of Stolen Island, JV. 7". 151 



18. Cardita borealis Conrad. Abundant. 21. Luc'ina radula Gould? A small 



19. Astarte sulcata Fleming. Abun- fragment, not showing the binge, 

 dant. but exceedingly well-preserved. 



20. Venus mercenaria Linn. Of very 22. Mactra lateralis Say. Small but 

 large size and excessively thick and abundant. 



heavy. This species constitutes 23. Mya arenaria Linn. Fragments of 

 the bulk of the deposit. The shells very large size are very abundant, 



are all broken but not rolled, the 24. A small coral, 



fractured edges being still perfect- 25. Fragments of a'Balanus. 

 ly sharp in most cases. 



In the determination of most of these species I had the 

 advantage of the opinion of the late Mr. ¥m. Cooper. With 

 the exception of Fusus decemcostatus and perhaps Lucina 

 radula, they are all still inhabitants of the neighboring waters, 

 south of Cape Cod ; but still the group as a whole seems to 

 have a more northern aspect than the group of species at pre- 

 sent inhabiting those waters, contrary to the conclusions drawn 

 by Mr. Desor from lists of Post-Pleiocene fossils obtained by 

 Mr. Conrad at the mouth of the Potomac, by Mr. Stimpson at 

 Point Shirley (Boston Harbor), and by himself at Sancoti Head 

 (Nantucket). (See Sill Journ., July 1852, p. 53.) 



Note. — It is not impossible that several of the species dredged in the waters 

 of Peconic and Gardiner's Bays (see Ann. Lye, vol. vii., April, 1860), such as 

 Astarte mactracea, Corbula contracta, and Cumingia tellinoides, of the first two of 

 which no living specimen, and of the last only a single one has been found by 

 me, although all are abundant in very deep dredging, may be derived from sub- 

 marine deposits of this character, instead of belonging to the recent fauna of the 

 Bays. 



XYIII. — Catalogue of the Mollusca of Staten Island, N. Y. 



By J. "W. Hubbard, M.D., and Sandekson Smith. 



Read May 1, 1S65. 



[The character * indicates that the species is abundant ; t that it is scarce. To several, espe- 

 cially among the fresh-water shells, which have been but imperfectly examined, no mark is 

 prefixed.] 



*Ranella caudata Say. *Buccimim plicosum Menke. 



♦Pyrula carica Brug. *Nassa obsoleta Say. 



*Pyrula canaliculata Brug. *N. trivittata Say. 



