152 On the Mollusea of Long Island. 



13. Natica hews Say. Rare and very small in the Bays. 

 On the Sound, only a mile or two distant, both this and the 

 following species are very abundant, and commonly more than 

 three inches in diameter. On the south side of Montauk Point 

 fragments of specimens four or five inches in diameter are com- 

 mon. — to 4 to 10 faths. 



14. Watica dujplicata Say. Eare and very small. — to 3 

 to 10 faths. 



15. Natica triseriata Say. Moderately abundant and rather 

 large. 2 to 10 faths. 



16. Natica pusilla Say, non Gould. Thirty or forty living 

 specimens of the same species dredged by Messrs. Prime & 

 Stimpson in Buzzard's Bay, and by Lt. Kurtz in S. Carolina, 

 were dredged on one octasion in four or five faths. sand in 

 Gardiner's Bay. Dead specimens had previously occurred, 

 rarely, in the Bays. 



17. Natica immaculata Totten. A few dead specimens. 

 Several very large ones were found about Napeague Point, just 

 outside of the southern extremity of Gardiner's Bay. 



18. Eulima siibangidata Stimpson f Eight or ten dead 

 specimens dredged at various times in ten faths. 



19. Chemnitzia jproducta Stimjpson. Rare. Only dead speci- 

 mens among accumulations of Cer. Sayi, Yenus gemma, &c. 



20. Chemnitzia fusca Stimpson. Rare. Found with pre- 

 ceding. 



21. Gheranitzia seminuda Stimpson. E"umerous specimens 

 dredged in two faths. mud. 



22. Chemnitzia Msuturalis Stim,pson. Rare. Animal white. 

 Foot about half the length of the shell. Tentacles short and 

 thick, about quarter the length of the shell. Eyes black, be- 

 tween bases of tentacles. Under stones at low water mark. 



23. Chemnitzia trifida Stimpson. Moderately abundant at 

 low water mark under stones, and on the inside of dead valves 

 of Pectsn irradians, together with the preceding species, and 

 Cer. Sayi. The animal is entirely white. Tentacles about 



