T 
384 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.’ 
edged, and recedes in a broad curve anteriorly, so that the body of the 
shell is relatively very small. There is a small, shallow pit in the place 
of the spire. Sculpture inconspicuous; many lines of growth, and very 
fine, wavy, spiral striw, visible with a lens, cover the whole surface, 
which has a glistening and opalescent or pearly luster. 
Length of the entire animal, 25™™ or more; length of shell, 15™™; 
breadth of shell, 10™™. 
Several living specimens from station 876, about 100 miles south of 
Newport, R. I., in 120 fathoms. 
This is one of the largest species of the genus, and one of the most 
beautiful and delicate. 
Philine Finmarchica M. Sars. 
G. O. Sars, op. cit., p. 296, pl. 18, figs. 10 a-d; pl. xii, fig. 1 a, b (dentition). 
Off Cape Sable, Nova Scotia, 90 fathoms, fine sand, 1877; 70 to 75 
miles south of Martha’s Vineyard, 65 to 192 fathoms. 
Philine fragilis G. O. Sars. 
G. O. Sars, op. cit., p. 296, pl. 18, figs. 11 a-c; pl. xii, fig. 2 (dentition). 
Off Cape Sable, Nova Scotia, 90 fathoms, fine, compact sand, 1877; 
Jefirey’s Ledge, Gulf of Maine, 88 to 92 fathoms, 1574, several large 
living specimens. 
Philine cingulata G. O. Sars. 
G. O. Sars, op. cit., p. 297, pl. 26, figs. 7 a-c; pl. xii, fig. 3. 
Oif Cape Sable, Nova Scotia, 90 fathoms, with the preceding. Taken 
this season at stations 892 and 894, in 487 and 365 fathoms. 
These four species of Philine are new to the American coast. Prob- 
ably additional species of this genus will be detected when all our col- 
lections shall have been fully examined. 
‘Pleurobranchea tarda Verrill. 
Amer. Journ. Sci., xx, p. 398, Nov., 1880. 
Body subovate, stout, thick, often nearly half as broad as long, 
usually less, tapering backward and blunt posteriorly; front broad, 
convex or subtruncate; back more or less convex or swollen in the 
middle, with the surface wrinkled or irregularly reticulated, with the 
sunken lines brown, the reticulations smaller posteriorly. Dorsal ten- 
tacles short, stout, wide apart, ear-like, subtubular, having a slit on the 
outer side, with the edges often rolled in. Gill rather large, well 
exposed in a dorsal view, situated on the right side, behind the middle, 
and equal in length to nearly one-fourth the body, plumose, bipinnate, 
with 15 or 16 pinne on the upper side. Foot bread, often nearly as wide 
as the mantle, subtruncate or rounded in front, narrowed and obtuse 
posteriorly, ordinarily not extending beyond the mantle. The mantle 
edge is but little prominent, except along the right side. Proboscis 
protruded in most of the specimens, large, thick, obtusely tapered close 
to the end, which is emarginate, showing the large odontophore in a 
