150 Post-Pleiocene Deposit on Gardiner's Island. 



it, hoping to have an opportunity to investigate it more tho- 

 roughly, which, however,'! have not yet done. As it appears 

 to be richer in species than any locality hitherto described 

 between North Carolina and the St. Lawrence, even a partial 

 list of the fossils may be interesting. 



It is situated on the eastern shore of the Island, near the 

 southern extremity of the high land, and about fifteen or twenty 

 feet above the sea-level. The thickness of the bed it is some- 

 what difficult to state exactly, as the breaking down of the 

 bank causes the shells to cover the surface of the bluff down 

 to the beach. It is probably four or five feet, however, and the 

 length appeared to be about 150 to 200 feet, the bed thinning 

 out at each end. It is composed mainly of sand and fine gra- 

 vel, with few large pebbles only, so far as I recollect. The 

 species found number 25, but careful examination would pro- 

 bably considerably increase this number. 



1. Nassa trivittata Say. 



2. Nassa vibex Say ; fragment only, 

 but, I think, undoubtedly of this 

 species. 



3. Fusus decemcostatus Say. A frag- 



ment of the pillar of a large uni- 

 valve, about an inch long, and not 

 at all rubbed. Probably of this 

 species, but larger than the corres- 

 ponding part of a specimen in my 

 cabinet 3"9 inches long. 



4. Purpura lapillus Lam., a fragment. 



5. Columbella lunata Sowerby. Seve- 

 ral specimens. 



6. Natica duplicata Say. Several spe- 



cimens. 

 V. Fragments of a small convex Nati- 

 ca, like heros or triseriata. 



8. Chemnitzia interrupta Stimpson. 

 Several specimens. 



9. Crepidula unguiformis Lam. Seve- 

 ral specimens. 



10. Crepidula fornicata Lam., one very 



small specimen. 



11. Tornatella punctostriata Adams? ? 



I have a distinct recollection of 

 having observed a well-marked 

 specimen of this species among my 

 collections, but the specimen can- 

 no., now be found, and the shell 

 here referred to is in a very imper- 

 fect state. 



12. Bulla canaliculate Gould. 



13. Ostrea borealU Lam. Some small 



Ostrese were found, exceedingly 

 convex, which it was thought by 

 the late Mr. Wm. Coooer might 

 prove to be a new species. 



14. Pecten Islandicus Chemn. A frag- 



ment. 



15. Pecten Magellanicus Lam. Nu- 

 merous fragments. 



16. Area transversa Say. Abundant. 



17. Area pexata Say ? ? A fragment. 



