A. E. VerriU — Catalogue of Marine Mollusca. 
583 
The variety is nearly smooth and somewhat lustrous (tig. 43). The 
largest is 42 U,U1 in the longest diameter; hinge margin 3G"" U . 
This shell was found in considerable numbers adhering to hydroids, 
in 65 to 192 fathoms, south of Martha’s Vineyard, at stations 865 to 
867, and 869 to 873, in 1880; and at 949, 950, in 69 to 100 fathoms, 
1881. 
Southern England to the Azores, Canary Islands, and the Mediter- 
ranean. 
EXPLANATION OF PLATES. 
I am indebted to Professor S. F. Baird for permission to use in this place some of 
the drawings prepared' for the illustration of the reports of the IT. S. Fish Commission. 
They were mostly drawn from nature by Mr. J. H. Emertou, under the immediate 
direction of the author. Unless otherwise specially stated, they are from Xew Eng- 
land specimens. All are from the eastern coast of Xew England and Canada. 
Plate XLII. 
Figure 1. — Marsenina glabra Y., p. 517, front view', x 24 diameters. 
Figure la — The same. Dorsal view. Eastport, Me., 1864. 
Figure 2. — Marsenina prodita, p. 518, front view, x 24 diameters. 
Figure 2a — The same. Dorsal view. Eastport. Me., 1868. 
Figure 3. — Marsenina ampla Y., p. 518, front view, x 2\ diameters. 
Figure 3a — The same. Dorsal view. Eastport, Me., 1868. 
Figure 4. — Marsenina glabra, § , p. 517, ventral view of the living animal, x 3 diame- 
ters. Eastport, Me. 
Figure 5. — Torellia vestili. p. 521. front view, x 24 diameters. Gulf of Maine. 
Figure 6. — Lacuna glacialis, p. 522, front view, x 24 diameters. Gulf of St. Lawrence. 
Figure 7. — Cerithiella Whiteavesii V., p. 522, x 64 diameters. Gulf of St. Lawrence. 
Figure 8. — Cingula Jan-Mayeni, p. 524, x 10 diameters. Gulf of St. Lawrence. 
Figure 9. — Lunatia nana, p. 516. x 24 diameters. Side view, from life. Xo. 1266. 
Figure 10. — Scytlcea Edwardsii V., p. 550, 4 natural size. 
Figure 11. — Issa lacera, p. 547, dorsal view, from life; about natural size. 
Figure 12. — Acanlh/jdoris ornata V., p. 549, dorsal view, from life : more than natural 
size. Eastport, Me. 
Figure 13. — Idaliel/a pulchelbt, p. 548, side view, natural size, from life. Salem, Mass. 
Figure 1 I. — Coryphella Stimpaoni V., p. 552. ventral view of head and anterior part of 
body, from life, enlarged about 2 diameters. Eastport, Me. 
Figure 15. — Caryphelbi nab it is V., p. 552, two rows of teeth of the radula ; much 
enlarged. 
Figure 16, a, b. — Dentalium occidental St.: a. aperture; b , side view of a young 
example, x 5 diameters. 
