PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 127 



Bittium nigrum (Totten) Stimp. Gould, Inv. Mass., II, p. 321, 1870. Ver. , Inv. V. S., 

 p. C48,'1874. 



Very abimdaut amongst *the eel-grass, in shallow water in front of 

 the town, and off the dike, and also on the beaches, where it often 

 occurs in immense numbers. 



Crepidula fomicata (Linn^) Lamarck. Gould, luv. Mass., II, p. 271,1870. Ver., 

 Inv.V.S.,p.649, 1874. 



Common, especially in the vicinity of the dike, on shells of Pecten 

 and Ensatella. 



Crepidula plana Say. Gould, Inv. Mass. , II, p. 272, 1870. Ver., Inv. V. S., p. 650, 1874. 



Common off the dike, and also found elsewhere. 



Crepidula convexa Say. Gould, Inv. Mass., II, p. 273, 1870. Ver., Inv, V. S., p. 650, 

 1874. 



Abundant off the dike, adhering to the surfaces of living and dead 

 shells, to LimuluSj and other objects. 



Acmaea testudinalis (Miiller) Forbes and Hanley. Ver., Inv. V. S., p. 661, 1874. 

 Gould, Inv. Mass., II, p. 267, 1870 (Tectura). 



Eare, shore; variety alveus also found. 



Odostomia bisuturalis (Say) Gould, Inv. Mass., II, p. 327, 1870. Ver., Inv. V. S., p. 

 656, 1874. 



Kot uncommon ; eel-grass off the dike, and elsewhere. 



Odostomia trifida (Totten) Gould, Inv. Mass., I, p. 274, 1841 ; II, p. 328, 1870. Ver. 

 Inv. V. S., p. 656, 1874. 



Associated with the last, and about equally common. 



Odostomia dealbata Stimp. Gould, Inv. Mass., II, p. 327, 1870. Ver., Inv. V. S.,p. 

 656, lte74. 



A single specimen only was obtained from the eel-grass off the dike. 



Melampus lineatus Say, Am. Conch., p. 85, 1822. — Melampus Udentatus Say. Gould, 

 Inv. Mass., II, p. 467, 1870. Ver., Inv. V. S., p. 662, 1874 (non Mont.). 



Abundant, shore, between tides. 



Onchidoris, sp. 



An undetermined species of this genus was obtained from sea-weeds 

 on the inner beach at Long Point. 



Tergipes despectus Aid. and Han. Ver., Inv. V. S., p. 667, 1874. — ^olis (Tergipcs) 

 despecta Gould, luv. Mass., II, p. 248, 1870. 



From hydroids, on piles of wharves, and sea- weeds of beach. 

 Embletonia fuscata Gould, Inv. Mass., II, p. 251, 1870. 



Found among the filamentous green algae in little rills of water on the 

 beaches and sand-flats. 



Stiliger fuscata Bergh. Ver., Prelim. Check List, p. 23, l^^.—Calliopcea {1) fuscata 

 Gould, Inv. Mass., II, p. 250, 1870. 



Associated with Embletonia fuscata. 



