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7 ’ 

A, E. Verrill— Catalogue of Marine Mollusca. 523 
Litiopa bombix Rang. 
LIitiopa bombix Woodward, Manual Conch., p. 136, pl. 9, fig. 24, 1856. 
H. and A. A. Adams, Genera, i, p. 324, pl. 34, fig. 5a, 1858 (bombyz). 
Chenn, Man. de Conch., i, p. 304, fig. 2150, 1859. 
Found attached to floating gulf-weed (Sargassum, sp.) at station 
1038, off Martha’s Vineyard, N. lat. 39° 58’. 
The apex of this shell is slender and acute, consisting of about three 
whorls, which are distinctly decussated, in contrast with the succeed- 
ing whorls, which are smooth, or nearly so. The first whorl is very 
minute and prominent. 
Hydrobia ? levis (Dekay) Verrill. 
Cingula levis Dekay, Nat. Hist. N. York, Mollusca, p. 111, pl. 6, fig. 118 (bad), 1843. 
Littorinella levis Verrill, Rep. Invert. Anim. Vineyard Sd., in Rep. U. S. Fish. Com., 
i, p. 653, 1874, (auth. cop., p. 359). 
This species has not been well studied and its generic position is 
doubtful. Perhaps it is not even distinct from AZ minuta. The soft 
parts and dentition are not known. 
According to the original description, the whorls are convex and 
there is a large umbilicus. The figure is very poor. 
New York harbor, Long Island Sound. Littoral. 
Rissoa Stimpsoni Smith. 
Rissoa Stimpsoni Sanderson Smith, Annals Lyc. Nat. Hist. New York, vii, p. 157, 
1860; ix, p. 393, fig. 2, 1870. 
This species may not be distinct from the preceding, but I have 
not seen authentic specimens. 
From Wood’s Holl, I have a similar elongated species, with six to 
seven very convex whorls and deep suture. The umbilicus is very 
small. Color chestnut-brown. I am not certain that it is identical 
with this. 
Cingula harpa Verrill. 
fissoa (Cingula) harpa Verrill, Proc. U. 8. Nat. Mus., iii, p. 374, 1880. 
PuAtTE LVIII, Figure 6. 
Dredged by the U.S. Fish Com., off Massachusetts Bay, 1877, 
Station 34, in 160 fathoms; off Newport, R. L, and Martha’s Vine- 
yard, at stations 892 and 894, in 487 and 365 fathoms, 1880; and at 
947, in 312 fathoms, 1881. 
TRANS. Conn. AcaD., VOL. V. 63 JULY, 1882. 
