334 Marine Shells of Massachusetts. 
Dinaricngas (?) SERPULOIDES. 
des ; Parton, Conch. Dict. p. 228. Delphinoidea 
serpuloides ; Brown's Plates, pl. 51, fig. 40, A1. 
sta minima, sublevi ; anfractibus. rotundis, tribus; suturà am- 
plà, valdé impressa ; aperturà orbiculari ; labro anticé “producto, te- 
nui; 'umbilico profundo. ites. 
Shell diaphanous, reddish brown or horn color, 
smooth, not shining ; aper obtuse ; whorls a little 
more than three ; body-whorl constituting about: 
four-fifths of the shell; margins of the aperture thin, 
simple, separate from the body-whorl; labrum ex-. — 
tending forwards so far, that, if the plane of tlie aper- 
ture were produced, the axis of the shell would fall 
wholly within it ; umbilicus profound. 
Length, .03 inch ; least breadth, .055 inch ; great- 
est breadth, .07 inh. 
Operculum horny, thin, lamellar, rige sub- 
spiral, fitting ; lamine concentric ; diameter, .03 inch. . 
Cabinets of Bost. Soc. Nat. Hist.; of Middlebury 
College ; of George B. Emerson, Esq., Boston ; of 
J. W. Mighels, M. D., Portland ; of J.. Ms Anthony, 
Cincinnati ; and my own. à 
June 7 th, 1838, this shell was found quite plenti- 
fully at East Boston, in company with Turbo aculeus, — 
Gould, and Jaminia exigua, Couth., clinging to 
smooth stones, which were lying in the mud. near 
low water mark. ‘This spot has since been covered 
by the construction of Cunard Street. A few individ- 
uals have been found elsewhere at East Boston. 1 
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