ANACHIS. 163 



1817-79 by the dredgings of the U. S. Coast Survey Steamer 

 Blake, and described by Mr. W. H. Dall. He says : " This 

 species is most nearly allied to Astyris rosacea, Gould, from 

 which the faintly sculptured specimens differ by the smaller 

 mouth in proportion to the spire, and the characters of the epi- 

 dermis and aperture ; the character of the plications also differs 

 from that of A. rosacea. The solitary pustular denticle is a very 

 peculiar, and, as far as I am aware, unique feature." Unfigured. 

 C. strix, Watson, and its var. subacta, are evidently synonyms : 

 the species has not been figured, but the description is sufficient 

 to indicate this. 



C. STRICTA, Watson. 



Shell short and dumpy, with a rather high, scalar, blunt spire, a 

 short but broadish last whorl, and a small, slightly reverted snout ; 

 there are on the last whorl twelve longitudinal ribs, separated 

 by furrows three times their width, these ribs increase in number 

 rapidly up the spire ; there is a slight tubercular ridge at the 

 top of the whorls, and obsolete spiral striae below, becoming 

 more distinct towards the base of the body-whorl ; color porcel- 

 lanous white ; apex blunt, smooth ; whorls six, scarcely convex ; 

 mouth small, lip contracted and slightly curved above, with ten 

 small teeth within, of which the highest is remote from the top 

 and larger than the others ; just at this point is a slight open 

 false sinus. L. -25, diam. -13 ; mouth long -11, broad '06 in. 

 Near St. Thomas, W. /., 390 fms., in coral mud. (Challenger Exped.) 

 If this should prove to be an older state of the next species, 

 it will become a synonym thereto. 



C. AMPHISSELLA, Dall. 



Shell small, stout, blunt tipped, yellowish white, of four and a 

 half whorls ; nucleus large, white, shining, smooth, of one and a 

 half whorls ; sculpture of numerous (on the last whorl twenty-one) 

 straight, subequal plications with about equal interspaces, begin- 

 ning at the suture, passing clear over the whorl, and fading out 

 only when near the canal ; also faint lines of growth ; spiral 

 sculpture of numerous equal fine rounded threads (twenty-one 

 on the last whorl) with slightly wider interspaces, covering the 

 whole shell except the nucleus ; pillar short, stout, a little con- 



