ml J PROCEEDINGS OF THE NATIONAL MUSEUM. 355 



and uniform, with about equal interspaces, some a little granular from 

 tlie radiating sculpture ; beside these there are three very strong carina 1 ; 

 one forms the margin of the nearly flat spire, the second extends hori- 

 zontally just below the periphery, the space between them deeply ex- 

 cavated; the third forms the edge of the funicular narrow deep umbil- 

 icus. The base is conical, excavated just within the peripheral carina; 

 it rises to the edge of the umbilicus, which is marked by a strong thread, 

 and within is vertically striated. The last whorl descends from the 

 plaue, and finally becotues separated from the body whorl; the margin 

 is simple, sharply angnlated by the carinations, otherwise the aperture 

 would be ovate, with the columellar side somewhat excavated. Alti- 

 tude, 1.6; maximum diameter, 2""". 



Hab. — Off the coast of North Carolina, in 22 to G3 fathoms, sand and 

 gravel, at U. S. Fish Commission Stations 2595, 2598, 2G08, 2G10, and 

 2G12, the temperature varying from G7° to 78° F. 



This is a very strongly marked species, in its sculpture recalling C. 

 Yerreauxi Fischer, which is larger, less elevated, with a proportionally 

 larger umbilicus, and has not the deflected aperture. The latter recalls 

 the characters of Tubiola divisa J. Adams, which is otherwise very dif- 

 ferent. 



Cyclostrema pompholyx Dal I. 



C. pompholyx Dall, Bull. Mus. Comp. Zool., xvm, p. 394, PL xvm, Fig. 9, June, 1889. 

 This species was originally obtained in the Gulf of Mexico, in 805 fath- 

 oms, by the Blake expedition, and Dr. Rush obtained a young specimen 

 in 780 fathoms, mud, off Cuba. A specimen with a maximum diameter 

 of G and a height of 4.5 mm was dredged by the Albatross at Station 

 2754, in 880 fathoms, ooze, off Tobago; bottom temperature, 37°.9 F. 

 This considerably extends the known range southward. 



Cyclostrema valvatoides Jeffreys. 



Collected at Station 27G0, 90 miles north from Ceara, Brazil, in 1,019 

 fathoms, broken coral; temperature 39°.4 F. 



Cyclostrema diaphanum Verrill. 



Obtained at Station 2752, off Santa Lucia, in 28L fathoms, sand; tem- 

 perature 48° F. ; and also at Station 27GO, with the preceding. 



Superfamily ZYGOBRANCHIA. 



Family HALIOTID.E. 



Genus HALIOTIS Liniu5. 

 Haliotis Pourtalesii ? Dall. 

 Plate xn, Figs. 1, 3. 

 H. Pourtalesii Dall, Bull. Mus. Comp. Zool., ix, p. 79, 1831; xvm, p. 395, 1889. 



Shell small, of a pale brick red color, with white dots on some of the 

 spirals, rather elevated, with about two and a half whoils; apex small, 



