AET. 17 ILLUSTRATIONS OF TYPES OF SHELLS BALL 11 



of shell, 46; maximum diameter, 14mm. U. S. Nat. Miis. Cat. No. 

 110769. 



Dredged by the United States Bureau of Fisheries Steamer Alba- 

 tross^ at station 3707, off Honshu Island, Japan, in 63 to 70 fathoms, 

 volcanic sand. 



This belongs to the group of C. varicoswn Lamarck, to which many 

 species have been inadvisably referred though discriminable by their 

 minor sculpture. 



COCCULINA JAPONICA Dall 

 Plate 26, figs. 3, 5 



Cocculina japonica Dall, Smithsonian Misc. ColL, vol. 50, p. 169, 1907. 



Off Sado Island, Japan, in 200 fathoms. U. S. Nat. Mus. Cat. No. 110544. 



COCCULINA RHYSSA, new species 



Plate 32, figs. 10, 11 



Shell small, translucent white, ovate, with a nearly smooth flat- 

 tened apical area with the protoconch showing as a small opaque 

 white spot in the center ; outside of this area the concentric sculpture 

 rises as sharp-edged laminae, about 10 on the type specimen, with 

 wider interspaces and their edges crenulated by the radial sculpture ; 

 the radial sculpture consists of numerous threads which do not di- 

 vide distally and are separated b}^ narrower interspaces ; the interior 

 of the shell is smooth and white; the apex is about one-third of the 

 length from the anterior edge, both slopes are somewhat convex ; the 

 margin of the shell is very slightly crenulate by the radial sculpture ; 

 height of shell, 3 ; length 7.6 ; width 5 mm. U. S. Nat. Mus. Cat. No. 

 110782. 



Dredged at station 3721, in 250 fathoms, off Hondo, Japan, bottom 

 temperature 64° F. This is the first species of the genus to show pro- 

 nounced sculpture. 



COLUS (ANOMALOSIPHO) ADONIS Dall 



Plate 1, fig. 8 



Coins (Aulocofusus) adonis Dall, Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 

 316, 1919. 

 Siiruga Gulf, Japan, in 503 fathoms. U. S. Nat. Mus. Cat. No. 205212. Also 

 found in Alaskan waters. 



COLUS (LATISIPHO) APHELUS Dall 



Plate 1, fig. 3 



Chrysodomiis aphelus Dall. Proc. U. S. Nat. Mus., vol. 12, 1889, p. 323. 



Off Santa Barbara, California, in 414 fathoms. U. S. Nat. Mus. Cat. No. 

 206449. 



