142 JOURNAL OF THE NEW JERSEY 



volving lines. Bluish to reddish-black. L. 6 ; D. 2 ; An. 28° ; 

 Wh. 7 ; Ap. J.— Mass. Bay to Sandy Hook. 



2. Bittium varium, Pfr. Shell very similar to the last, but 

 growing larger south of Cape Hatteras ; takes the place of it fiom 

 Md. and south. 



Family 61. C/ECID/E. 



A small family of the one genus : — 



1. C^cuM, Flemg. 



Young shell spiral in one plane, afterwards, a curved tube 

 closed by a convex partition where the spiral portion has been 

 lost. Animal with a long, flat rostrum, and sessile eyes behind 

 the short tentacles ; foot short, narrow. 



1. Caicwn imlchellum, Stim. Shell tubular, slightly cuived, 

 contracted at both extremities, with about 25 rounded rings. L. 

 2 J ; D. J. — Mass. and south. 



2. Cxcum Cooperi, Smith. Shell tubular, slightly curved, wdth 

 about 12 longitudinal, elevated lines; the spaces between are 

 wider than the lines and have transvert^e grooves. L. 3 ; D. f . — 

 Mass. and south. Rare. 



Family 62. VERMETID/E. 



Shell tubular, attached, sometimes regularly spiral when 

 young, always irregular when adult; aperture round. Animal 

 with rudimentary foot and long head. 



1. Vermetus, Adanson. 



Shell irregularly spiral or contorted, tubular, free or attached 

 on one side ; operculated. 



1. Vermetus radicula, Stim. Shell regularly spiral when young, 

 irregularly tubular in its later growth, with numerous, unequal, 

 raised lines extending its entire length ; the spiral portion has 

 about 8 whorls (this part 12 long) the rest of the shell may ex- 

 tend 200. Animal with rudimentary foot, long head, and re- 

 tractile proboscis. Animal light-brown spotted with black. — 

 Mass. and south. Not rare south. 



Family 63. LITTORINID/E. 



Shell spiral, top-shaped or globular ; lip not notched ; interior 

 not pearly ; operculum horny, spiral or slightly so. Animals in- 

 habiting salt, brakish or fresh water. They are mostly littoral, 

 feeding on alg£e. 



