214 BULLETIN OF THE 
closing the canal its entire length. There is a tube corresponding to a former 
canal on the left of the present one for about half its length, which projects 
strongly outward at the end. Operculum thin, horny, amber-colored. Suture 
distinct, slightly channelled. Varices three, equally spaced, high, very thin, with 
an irregular slightly notched edge, the last one formed a little before the edge 
of the outer lip. Each stands a little in front of the corresponding one above, 
rises above the suture, laps a little on to the preceding whorl, then reaches 
high above with a re-entrant curve, the greatest height being in a line with the 
posterior angle of the aperture. When dry, the surface on the back of these 
and between them is without lustre, and is covered with microscopic revolving 
_striz crossed by inconspicuous lines of growth. There are also a few broad, 
widely separated, rather indistinct revolving threads, which are most apparent 
on the varices. These number about eight on the last varix, but the two or 
three lowest ones are almost imperceptible. The surface on the front of the 
varices is very lustrous, covered with the very thin, irregular edges of the sev- 
eral layers of growth; the upper revolving threads appear as broad shallow 
grooves. Nucleus large, of two smooth lustrous whorls, the apical one promi- 
nent and decidedly upturned. 
Length, 16 mm.; breadth, including varices, 9.5 mm.; length of aperture 
and canal, 10.6 mm.; of canal, 5.5 mm.; greatest height of the last varix, 
3.5 mm. 
This is a very interesting species and quite unlike any hitherto described. 
Trophon Verrillii, sp. nov. 
Plate I. Fig. 16. 
Two living and three dead specimens, Station 325, off Cape Fear, N.C., in 
647 fathoms. 
Shell of moderate size, thin, translucent, bluish white, slightly lustrous, con- 
sisting of five whorls besides the nucleus, with a rather high spire ornamented 
with numerous conspicuous lamelle and revolving strix, and a long, rather slen- 
der, nearly straight canal. Aperture very long, club-shaped. Outer lip thin, 
with the edge spreading outwards when forming a lamella, oblique above the 
shoulder, rendered slightly concave when there is a prominent spine on the 
shoulder, beyond which it is well rounded, curving abruptly in about the mid- 
dle of the aperture, at the base of the canal, then continuing in a straight line, 
bending nearly at right angles to join the columella, Columella very decidedly 
twisted, curving outward from the point opposite the constriction of the outer 
lip, so that the canal is broad and open. Interior of the aperture very smooth 
and glassy. Suture distinct, undulating, slightly channelled. Conspicuous thin 
lamelle cross the whorls, directed obliquely backwards from the suture to the 
periphery, below which they bend slightly forward, and on the body whorl 
continue to the end of the canal. The number varies from twelve to fourteen 
in different specimens. In some specimens these lamelle rise into prominent 
