176 A. FE. Verrill— Mollusca of the New England Coast. 
Length, 3°5™"; breadth, 2"; length of body-whorl and canal, 
2:3™"; length of aperture, 2™™; its breadth, about 1™™, 
Off Martha’s Vineyard, station 1143, in 452 fathoms, soft mud, 
1882. One specimen. 
The affinities of this shell are doubtful, as the animal and opercu- 
lum are both unknown. The sculpture resembles that of some 
Pleurotomide. 
Trophon Lintoni Verrill and Smith, MSS. 
Verrill, Amer. Journ. Sci., vol. xxiv, p. 365, November, 1882. 
PLATE XXTX, FIGURE 1. 
Shell stout, rough, with six very convex, somewhat shouldered 
whorls, crossed by about nine very prominent, thick, obtuse ribs ; 
whole surface covered with strong, elevated, obtuse, scaly, revolving 
cinguli, usually alternately larger and smaller, separated by narrow, 
deep grooves; they are crossed by arched scales or lines of growth. 
Aperture broad; canal short, narrow, a little curved; umbilical pit 
distinct, but small. 
Length, 28"; breadth, 17°"; length of canal and body-whorl, 
19"; length of aperture, 15°5™" ; its breadth, 7-5™™, 
Named in honor of Professor E. Linton, a member of the Fish 
Commission parties in 1882 and 1885. 
Off Martha’s Vineyard, station 1118, in 70 fathoms, Fish Hawk, 
1882. One specimen. No other example has been taken, 
Trophon clavatus G. 0. Sars. 
Moll. Reg. Arct. Norvegiz, p. 249, pl. 15, fig. 12; pl. 23, fig. 14, and pl. IX, fig. 
17 (dentition). 
This species is rather common in our deeper dredgings. 
It agrees very well with Sars’s descriptions and figures. Among 
our numerous specimens there is considerable variation in form, 
and in the number and prominence of the thin elevated ribs. 
It occurred at station 2035, in 1362 fathoms; sta. 2037, in 1731 
fath.; sta. 2038, in 2033 fath.; sta. 2041, in 1608 fath.; sta. 2042, in 
55 fath.; sta. 2048, in 1467 fath.; sta. 2076, in 906 fath. ; sta. 2084, 
in 1290 fath.; sta. 2096, in 1451 fath.; sta. 2115, in 843 fath. 
It was most abundant at sta. 2038, N. lat. 38° 30’ 30”, W. long. 
69° 08’ 25”, in 2033 fath., twenty specimens (No. 34,847); sta. 2076, 
N. lat, 41° 13”, W. long. 66° 00’ 50’, in 906 fath. (No, 38,¢41), 
