516 
4. E. Verrill — Catalogue of Marine Moltuscd. 
Oft' Delaware Bay, station 1046, 104 fathoms, one living ( $ ), 1881, 
— Lieut Z. L. Tanner. 
Lunatia nana (Moll.) Sars. 
Natica nana Moller, Kroyer’s Tidsskr., iv, p. 80, 1842. 
Lunatia nana G. 0. Sars, op. cit., p. 159, pi. 21, figs. 19 a, b\ pi. v, fig. 14 (denti- 
tion). 
Yerrill, Proc. Nat. Mus., ii. p. 197, 1879; iii, p. 371, 1880. 
Mamma borealis Morck, Moll, of Greenland, p. 127, 1857, ( non Gray). 
Plate XLII, figure 9. 
This was taken by Prof. S. T. Smith and myself at Eastport, Me., 
in 1864; by Prof. H. E. Webster at Seal Cove, Grand Menan I., 
in 1872 ; on Le Have Bank, 45 fathoms, by Messrs. S. I. Smith and 
O. Harger, of the U. S. Fish Com.; on the “ Baclie,” in 1872 ; by the 
Fish Com. party in Casco Bay, 1873; off Cape Ann, 115 fathoms, 
1877; Halifax Harbor, and Bedford Basin, 16 to 33 fathoms, 1877 ; 
off Cape Cod, on Stellwagen’s Bank, 26 to 32 fathoms, 1879; by our 
parties in 1880 and 1881, south of Martha’s Vineyard and Block 
Island, in 22 to 29 fathoms. 
Gulf of St. Lawrence ! (coll. J. F. Whiteaves.) 
Greenland and northern Norway. Natica borealis Gray (Beech- 
ey’s Voy., Zoology, pi. 37 fig. 2, 1879), confounded with this species 
by Mo rch, is an umbilicated shell, with a high acute spire. 
Lunatia levicula Verrill. 
Lunatia levicula Verrill, Proc. U. S. Nat. Mus., iii, p. 371, 1880 (description). 
The largest specimen taken (station 985) is 40 mm long ; breadth 
37 mm ; length of body-whorl, 39 mm ; length of aperture, 33 ram ; 
breadth, 19 mm . 
This shell was first dredged by me, near Eastport, Me., in 1870. 
It has since been dredged by the United States Fish Commission 
parties in Casco Bay, Me., 1873; off Block Island, stations 812 to 
815, in 26 to 29 fathoms, 1880 ; off Martha’s Vineyard, station 873 
to 985, 26 to 100 fathoms, 1880 and 1881. It is still a very rare 
species. 
It has some resemblance to Acrybiaflava, on account of the light- 
ness and thinness of the shell, and in form, but the shape of the aper- 
ture is different, and there is a distinct umbilicus. The columella is 
also less incurved in the umbilical region. 
