OYLK UN L 



In tlii- ! 1C apical whorl j- -niooth, iiptm 



in a shallow pit formed by tin- : 'din- ffborli, OOC ri-ing a 



little above tin- other, \vith a ^lightly rounded -utural mar-m. In 



some specimens tb > do-ely coiled as nearly to conceii 



nucleus, while in others each turn i- visible. The. followinir turns 

 arc more loo>rly coiled, and the outer lip joins the bodv whorl a 

 little In-low the apex of the -hell. Some of the Fish ( lomioil 

 >perimeu> are considerably larger than Mr. Dall's types, and more 

 -lender in proportion to their length. One perfect speeim. n if 

 mill, long and 8 broad : another worn and broken one i- about 29 

 mill, long and \?> broa<l ; while still another is 2o mill, loni: and 1 1 

 Droad. (Bush.). 



A careful study of the radula and jri/xanl >ho\v.s that the correct 

 position of the species is with the Cylichme. The radula consists of 

 a series of strongly hooked, dark amber teeth, the lateral ones with 

 broad curved bases and the marginal ones with simple straight 

 bases, arranged in rows of five or seven on each side of the minute 

 median tooth, in small specimens these hooks are distinctly rough- 

 ened on the under surface by fine, raised longitudinal lines. The 

 three plates of the giz/ard are club shaped, with a yellow- white 

 flattened exterior surface and a dark reddish-brown convex interior 

 surface, the greatest convexity situated beyond the middle, in the 

 broader end, with a little flattened space in front defined by a lighter 

 shade of color. (Bush). 



C. DAI.LI Verrill. PI. 48, fig. 13. 



Shell elongated, white, translucent, somewhat barrel shaped, a little 

 broader medially, but nearer the anterior end; considerably nar- 

 rowed posteriorly, with a small pit at the apex. No umbilicus. 

 Aperture as long as the shell, very much narrowed posteriorly, and 

 ending in a narrow slit in the sutural line; anteriorly it increases 

 gradually about to the anterior third, when it suddenly expands into 

 an ovate anterior portion, by the strong excurvature of the col- 

 umella margin, and a slight expansion of the outer lip. The outer 

 lip rises, posteriorly, slightly above the level of the body-whorl, in 

 the form of a thin edge, separated from the body-whorl by a narrow, 

 deep fissure; passing backward it form- a gently sloping shoulder, 

 and is very -lightly convex and diverirt'iit to the anterior end. where 

 it is cut away for the entire width of the shell, and joins the col- 

 umella lip in a regular curve, with a sharp edge, not retlexed ; the 

 columella-margin _1\ excavated and sinuous and in the 



