t 

 226 RETUSA. 



lenger, Cylichna fijiensis E. A. Smith is broader, not squarely trun- 

 cate above, and not so plicate around the top of the body. Utricu- 

 lus phiala A. Adams, from Japan, is not nearly so long and narrow, 

 and is more cylindrical. Cylichna decussata A. Adams, which is 

 like in sculpture, is shorter, less cylindrical, and the outer lip 

 rises much higher behind. Cylichna pyramidata A. Adams, which 

 is puckered above, is much less cylindrical and is smooth in the 

 body. 



E. SIMILLIMA Watson. PL 21, figs. 9, 10. 



Shell small, short, truncately conical, with straightish outlines, a 

 perforated crown, and a small papillary apex, rounded and tumid 

 in front. Sculpture : Longitudinals the lines of growth are very 

 slight ; but round the top of the shell is a coronal of delicate folds 

 forming ridges and furrows of about equal strength ; these extend 

 over the top and into the perforation of the crown. Spirals 

 round the top is a slight but marked constriction ; above this the top 

 converges, and is finely scored" with small close-set furrows ; the rest 

 of the shell is superficially scratched with delicate, sharp-cut, fretted, 

 remote furrows parted by flat surfaces ; on the base the furrows are 

 closer and coarser, and the intervals rounded. Color translucent 

 white. Mouth the entire length of the shell, being considerably 

 produced posteriorly, where it is enlarged ; in the middle it is nar- 

 row and slightly bent, in front it is large and oval. Whorls 3 to 4 ; 

 the apex is papillary but very small and so deeply immersed as to 

 be doubtfully visible. Suture very difficult to distinguish, but ap- 

 parently impressed. Outer lip rises from the inner side of the per- 

 foration and bends in over it so as partially to cover it ; it arches 

 freely round and is not at all emarginate ; it runs pretty straight 

 forward for about three-fifths of its length, at this point it is slightly 

 constricted and contracted, but immediately bends to the right and 

 curves very regularly round the base, where it is patulous. Top 

 contracted, rounded, oblique, harshly radiatingly striate, and deeply 

 narrowly impressed. Inner lip convex, tumid in front, oblique and 

 slightly concave on the pillar, which is feebly toothed, and has a 

 very narrow, scarcely patulous, prominent edge, with a minute fur- 

 row behind it. Alt. O'l in., diam. 0*047. Mouth breadth at same 

 place 0-024 inch ( Wats.). 



Torres Straits and Winder's Passage, N. E. Australia, 3-11 fins. 



Utriculus simillimus WA* s., J. L. S. L. xvii, p. 340 ; Chall. 

 Gastr. p. 654, pi. 49, f. 2. 



