223 



Calliostoma (Astele) iridescens (Plate v., fig. 4). Shell 

 angularly conical, thin, yellowish iridescent, here and there 

 blotched with brown, particularly at the angle. Spire rather 

 high, acutely conical ; whorls 7, upper ones densely granulated, 

 the rest spirally lirate, liras (6 on the penultimate whorl) flat- 

 tened, and intersected by one or two shallow grooves, the upper 

 one or two slightly granulated. Last whorl broad and short, 

 slightly convex, sharply carinated at the periphery ; lirae more 

 numerous and less regular, thin and crowded in proximity to the 

 angle; base flatly convex, closely spirally ridged, and trans- 

 versely striated. Umbilicus deep, rather narrow, bordered by 

 an arched, slightly-raised ridge. Aperture obliquely quad- 

 rangular, lateral angle rather acute; columella short, truncated, 

 arched, callous, with a thin lamina projecting slightly over the 

 umbilical orifice ; outer lip thin, interior silvery. 



Length 16; width 17 millim. 



Hab. : — Cape Natal bearing N. i W. ; distant 4^ miles ; 

 depth, 55 fathoms. 



SOLARIELLA PERSCULPTA (Plate V., fig. 8). Shell angular, 

 abbreviately conical, white, width greater than the length. Spire 

 broadly conical, rather acute ; whorls 5, the first smooth, the 

 second slightly angular in the middle, closely longitudinally 

 plicated, the rest concave at the top, then biangular, the upper 

 angle being coronated with erect angular tubercles, the lower 

 sharply carinated and very closely plicately laminated at the 

 keel ; below the keel is a deep concavity, bordering which at the 

 suture of the penultimate whorl may be observed another nar- 

 row keel, bearing small angular tubercles or scales. Last whorl 

 broad, rather compressed, with a promment laminated keel at 

 the periphery, the nodules on the upper angles becoming less 

 prominent ; base compressly convex, with four rather distant 

 keels ; umbilicus deep and round, of moderate width, nodulously 

 plicate and lirate at the entrance. Aperture obliquely quad- 

 rangular ; peristome, thin, continuous, with a sharpish angle on 

 the right side, corresponding with the external keel. 



Length 8 ; width 9 milHm. 



Hab. : — Cape Natal bearing N. by E. ; distant 24 miles ; 

 depth, 440 fathoms. Bottom, sand. (Only two specimens 

 found.) 



Minolta (Nach^roplax) congener (Plate V., fig. 2). 

 Shell rather depressly orbicular, smooth, shining, light yellowish, 

 suffused with light brown, ornamented with waved zigzag and 

 acutely angular light and dark brown streaks. Spire depressly 

 conical; whorls 5! convex, moderately sloping, smooth, with only 

 here and there very faint traces of obsolete spiral striae ; suture 



