172. A. E. Vervill—Mollusca of the New England Coast. 
Length of the largest specimen, 30"; breadth, 177"; length of 
body-whorl to tip of canal, 23""; length of aperture and canal, 19"; 
breadth of aperture, 8™™. 
A living specimen was obtained at station 2042, N. lat. 39° 33’, 
W. long. 68° 26’ 45", in 1555 fathoms (No. 37,955), by the Albatross. 
This species bears little resemblance to any of those previously 
described from our coast. It is a larger and much stouter shell than 
S. pygmeeus, with much more convex whorls, and the latter species 
is without transverse ribs on the upper whorls. The last named 
character shows an affinity with S. eelatus and S. glyptus, but these 
are both smaller and more slender, and are ribbed in a much higher 
degree. 
Sipho celatus, var. hebes Verrill, nov. 
This variety differs from the typical form in having the spire 
shorter, and more abruptly tapered toward the tip, and in having 
the’whorls somewhat flattened, with the suture shallower, so as to 
give the shell a more cylindrical form. The ribs are numerous and 
well developed on all the whorls below the nucleus, and are distinctly 
excurved on the most convex part of the whorls. The lines of 
growth are thin and close, but are distinctly raised, and run parallel 
with the ribs. The spiral cinguli are very numerous, rather thin, not 
very prominent, often nearly obsolete on the last whorl. The oper- 
culum is ovate or pear-shaped, with the anterior end obtusely pointed 
and a little incurved, with the nucleus at the inner edge, near the 
anterior end, and showing a very slight tendency to the subspiral 
structure. 
This form occurred at station 2003, N. lat. 37° 16’ 30”, W. long. 
74° 20' 36”, in 640 fathoms, three specimens, one living (No. 35,659) ; 
station 2077, N. lat. 41° 09’ 40”, W. long. 66° 02’, in 1255 fath., one 
living specimen (No. 38,015) and station 2103, N. lat. 38° 47’ 20’, 
W. long. 72° 37’, in 1091 fath., one living and one dead (No. 35,424). 
Sipho (Mohnia) czlatulus Verrill, sp. nov. 
Shell small, fusiform, with an elevated, acute spire, the lower 
whorls with transverse ribs and raised spiral lines, the upper ones 
usually without ribs; in general appearance resembling S. ewlatus, 
but with the spire more elevated and acute and the ribs less strongly 
developed. Whorls about seven, moderately convex, not distinctly 
shouldered; suture rather deep, simple. The nucleus is small, 
smooth and little prominent, consisting of about two whorls; the api- 
