PUNCTURELLA. 241 



Challenger Gastrop., p. 38. FISCHER, Manuel, p. 862. DALL, 

 Blake Gastrop., p. 404. 



Differs from Puncturella s. s. in having the fissure upon the front 

 slope instead of at the summit. 



P. PELEX A. Adams. PL 28, fig. 8. 



Shell cap-shaped, ornamented with radiating crenulated lirse, the 

 interstices cancellated ; fissure chambered within, margins callous, 

 outside bordered with elevated longitudinal lips. Margin crenulated. 

 (Ad.') Length 5 mill. 



Off Mino-Sima, Straits of Corea ; 63 fms. 



P. pelex AD. Ann. Mag. N. H. v, 1860, p. 302. Thes. Conch, iii, 

 p. 209, f. 34.SowB. in Conch. Icon, xix, f. 2. 



P. PILEOLUS A. Adams. PI. 28, fig. 9. 



Cap-shaped, with radiating crenulated riblets, the interstices 

 cancellated ; vertex strongly curved backward ; fissure acute in 

 front, back margin reflexed. This species is more cap-shaped and 

 the apex more involute than in 0. pelex ; it is also more laterally 

 compressed and of smaller size. (Ad.) Length 3 ? mill. 



Off Mino-Sima, Japan. 



P. ASTURIANA Fischer. PL 26, figs. 36, 37. 



Shell gray, thin, depressed, oval, considerably broader in front 

 than behind ; with straight conical sides, convex in front and con- 

 cave behind, where in particular the margin is a little patulous ; it 

 is scored with sharpish ribs and concentric threads ; the lanceolate 

 slit is large and very low placed. Sculpture : From the point 30 

 to 40 sharpish ribs radiate out, in whose interstices as they diverge 

 smaller ones appear, which finally rival the first, so that toward the 

 margin 100 to 130 can be counted. The one in continuation of the 

 generic puncture is slightly raised, double and partially split, espe- 

 cially above, giving the impression of a suture ; these are crossed 

 by concentric threads of almost equal strength with the ribs, in 

 crossing which they rise into knots which sharply roughen the sur- 

 face. Color brownish-grey ; but the specimen is sonewhat black- 

 ened and discolored. Apex a good deal depressed, curled in and 

 projected backwards exactly in the middle line of the shell, the 

 minute tip just standing out on the right, forming a spire of 21 

 whorls. Slit very low, having its center quite two-thirds down the. 

 front slope; it is lanceolate, square behind, broadening a little 

 16 



