384 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



edged, and recedes in a broad curve anteriorly, so tliat the body of the 

 shell is relatively verj small. There is a small, shallow iiit in the place 

 of the spire. Sculpture incousiiicuous; many lines of growth, and very 

 tine, wavy, si^iral stria?, 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. 298, pi. 18, figs. 10 a-d ; pi. xii, fig. 1 a,h (dentition). 



Off Cape Sable, Nova Scotia, 90 fathoms, fine sand, 1877 ; 70 to 75 

 miles south of Martha's Vineyard, 05 to 192 fathoms. 



Philine fragilis G. O. Sars. 



G. O. Sars, op. cit., p. 298, pi. 18, figs. 11 a-c ; pi. xii, fig. 2 (dentition). 



Off Cape Sable, Nova Scotia, 90 fathoms, fine, compact sand, 1877; 

 Jeffrey's Ledge, Gulf of Maine, 88 to 92 fathoms, 3874, several large 

 living specimens. 



Philine cingulata G. O. Sars. 



G. O. Sars, op. cit., p. 297, pi. 26, figs. 7 a-c; pi. xii, fig. 3. 



Off Cape Sable, Nova Scotia, 90 fathoms, with the preceding. Taken 

 this season at stations 892 and 894, in 487 and 3G5 fathoms. 



These four species of Philine are new to the American coast. Prob- 

 ablj" 'additional species of this genus will be detected when all our col- 

 lections shall have been fully examined. 



Pleurobranchaea tarda Verrill. 



Amer, Jonrn. Sci., xx, p. 398, Nov., 1880. 



Body subovate, stout, thick, often nearly half as broad as long, 

 usually less, tapering backward and blunt i)osterioiiy ; 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 reticulatious 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 lather 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 KJ pinnjL* on the upper side. Foot broad, often nearly as wide 

 as the mantle, subtruncate or rounded in front, narrowed and obtuse 

 posteriorlj', 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 



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