6 4 



bear subquadrate beads, the colour of the base is nearly white, with spiral rufous streaks on 

 the lirae. Aperture subquadrate, nacreous, outer margin with 5 strong lirae, basal margin with 5 

 weaker ones, the margins are thin, thickened interiorly. Columella cylindrical, bluntly angulated 

 near the middle, angular but not toothed at its base. Umbilical region slightly impressed. 



Alt. 14Y2, diam. maj. 12 1 /.,, apert. alt. 5 1 /.,, lat. 6 l j„ Mill. 



By its shape this species is allied to C. speciosum Ads., but it differs by its regular, 

 conspicuous sculpture and by its painting, it is also a much smaller shell, though probably adult, 

 judging after its interiorly thickened margins of the aperture. Though I have described this 

 species with some doubt as new, I could not identify it with any known form. 



2. Calliostoma simplex n. sp. PI. V, fig. 5. 



Stat. 253. 5°48'.28 S., I23°I3'E. 304 M. Grey clay, hard and crumbly. 1 Spec. 



Shell elevated conical, imperforate, unicoloured, yellowish. Whorls 7 1 /.,, slightly convex, 

 with spiral lirae, increasing from 2 on the upper body whorl, to 6 on the penultimate and 7 

 on the upper surface of the ultimate one; suture not deep but distinct, accompanied by the 

 upper part of a nearly covered spiral. The spirals are closely beset with compressed beads ; 

 the upper row of each whorl is slightly the largest. Last whorl angular, keeled by the last 

 spiral. Base nearly flat, with 10 conspicuous, beaded spirals and a few very thin ones near the 

 aperture. Moreover the whole shell is covered with oblique, undulating, slightly laminar, radiating 

 striae, very distinct on the base. Aperture subquadrate, outer margin thin, a little convex, with 

 5 spiral grooves, basal margin convex. Columella cylindrical, slightly concave, patulous but not 

 toothed at the base, interiorly ending in a flat layer of nacre, running over the basal margin. 



Alt. 14, diam. maj. n 1 /»; apert. alt. 4 3 / 4 , lat. 5 Mill. 



Resembling in shape C. apicinum Dall, but differing by its colour, especially by its 

 coarser sculpture, its simple columella and not the least, by its size. 



3. Calliostoma miiltispiuosum n. sp. PI. V, fig. 6. 



Stat. 87. o°32'S., ii9°39'.8E. 655 M. Fine grey mud. 1 Spec. 



Shell conical, with concave sides, imperforate, unicoloured, yellowish. Whorls 8, flat or 

 slightly concave, with spiral lirae, of which 3 on the upper, 10 on the last whorl. Nucleus 

 obsolete, next whorls with spirals and radiating ribs, forming small spines when they cross ; on 

 the last 3 whorls the ribs disappear and only the spirals remain, the uppermost being in the 

 last 5 whorls, conspicuously the largest; these lirae are closely beset with compressed spines, 

 which resemble squamae, with very fine growth-striae in the interstices; periphery with a very 

 sharp weakly crenulated keel. Base slightly convex, with fine growth-striae and more conspicuous 

 spirals, of which 5 near the periphery and 5 near the centre are considerably stronger, the 

 latter are more or less nodulous. Aperture subquadrate, outer margin nearly straight, thin, with 7 

 shallow grooves interiorly, basal margin convex. Columella cylindrical, slightly concave, obsoletely 

 angular at the junction with the basal margin. 



Alt. 20, diam. maj. 21 ; apert. alt. 8, lat. 10 Mill. 



64 



