A. E. Verrill — Catalogue of Marine Mollusca. 
533 
Height, 2 mm ; breadth, 2 - 25 mm . 
A few specimens of this shell were taken in 1880, at station 892, 
in 487 fathoms. 
Cyclostrema rugulosum (Jeff. MSS.) G. 0. Sars. 
Moll. Reg. Arct. Norvegias, p. 129, pi. 21, figs, la, 15. 
This is smaller than the preceding species, with a circular umbilicus. 
The spiral lines around the umbilicus are finer and more numerous. 
Station 894, in 365 fathoms, 1880. Finmark; Lofoten I.; Norway, 
80 to 200 fathoms (t. Sars). 
Scissurella crispata Fleming. 
Off Martha’s Vineyard, stations 894-895, in 238-365 fathoms. A 
single specimen was found by Mr. Dali, in the aperture of a Mar- 
garita. Gulf of St. Lawrence, — coll. Packard (t. Dawson). On the 
European coast, from Finmark to the Mediterranean. Norway, 4Q 
to 400 fathoms, — Sars. 
Addisonia paradoxa Dali. 
Addisonia jmradoxa Dali, Proc. Nat. Mus., iv, p. 405, 1882 (descr., anatomy, denti- 
tion, etc.). 
Off Martha’s Vineyard, stations 923, 940, 950, 69 to 130 fathoms, 
1881. — U. S. Fish ’Commission. 
For this curious limpet-like species Mr. Dali lias constituted a new 
genus and a new family, Addisoniidce , belonging to the Rhiphido- 
glossa. The dentition is very peculiar. The shell is white, nearly 
smooth, with a roundish aperture and a prominent acute, excentric 
apex, turned obliquely to one side. The shape is something like that 
of Crucibulum striatum. 
Cocculina Beanii Dali. 
Acmcea rubella ? Terrill. Proc. U. S. Nat. Mus., iii. p. 391, 1880 (non Fabr., Sars, etc.) 
Cocculina Beanii Dali, Proc. Nat. Mus., iv, p. 403, 1882, (dentition, anatomy, etc.) 
Off Martha’s Vineyard, stations 871, 894, 115 and 365 fathoms, 
1880; stations 947, 949, 997, 100 to 335 fathoms, 1881, — U. S. Fish 
Com. West Indies, 399 to 502 £ fathoms, Blake Exp. (t. Dali.) 
For this new genus, Mr. Dali has established a new family, 
( 'Jocculinidce , allied to Eissurellidce, but with an imperforate and 
limpet-like shell, and a single asymmetrical gill. It has no lateral • 
cirriform appendages, and probably no eyes. 
