170 .1. II. Verrlll—MolhiHni <>fthe New England Coast. 



Sipho profundiCOla Vemll and Smith, sp. nov. 

 Plate XXXT, figure 13. 



Shell thin, stoiit-fusifortu, with very convex, evenly rounded 

 whorls and a moderately elevated, somewhat acute, turreted spire, 

 which occupies nearly one-half the length of the shell. Whorls six 

 or seven, the apex eroded in all of our specimens, apparently with a 

 small regularly spiral nucleus. The whorls increase i-ather rapidly 

 and are separated by a deeply impressed suture. The sculpture on 

 the two lower whorls consists of strongly marked, narrow, promi- 

 nent spiral cinguli, which are somewhat unequal in size, and 

 sepai'ated by wider, concave interspaces, which are crossed by dis- 

 tinctly raised, but delicate and close, lines of growth, due largely to 

 the epidei'mis rising in scale-like forms. These lines of growth are 

 less conspicuous over the sjnral ribs, which they render somewhat 

 uneven. The upper whorls have, in addition to the small spiral 

 cinguli, a pretty distinctly marked carination at the shoulder, and 

 are crossed by slightly elevated, longitudinal ribs or folds, which 

 produce a series of slightly raised nodules where they cross the 

 larger carina at the shoulder. On the penultimate whorl there are 

 from fourteen to sixteen revolving cinguli. Aperture long-ovate, 

 broadly rounded in the middle. The outer lip is thin and evenly 

 rounded from the suture to the base of the canal, where it forms a 

 sinuous curve. The canal is short, narrow, somewhat constricted at 

 the base and nearly straight, except near the end, where it is slightly 

 recurved. Columella not much bent, its inner edge with a slight 

 sigmoid curvature. The operculum is thin, ovate, with the inner 

 margin more convex than the outer, and with the posterior margin 

 evenly rounded and the anterior end slightly curved to the obtuse 

 tip, which shows no spiral structure. The operculum is rather 

 small as compared with the size of the aperture. Epidermis is thin 

 but distinct, not hairy, though rising into scale-like edges along the 

 lines of growth. Its color is pale brownish yellow. 



The only sj>eciraen Avith the animal is a male (from station 2038), 

 the largest in the collection. The tentacles are long, slender, taper- 

 ing to acute tips. No eyes can be detected in the preserved 

 specimen. The other specimens show some variation in the propor- 

 tion of length to breadth and in the size and closeness of the revolv- 

 ing cinguli, which are sometimes pretty regularly alternately larger 

 and smaller. 



Length of the largest specimen, male, 40""" ; breadth, 23'"'" ; length 



