221 



long, acute ; whorls 9, rather squarely convex, without spiral 

 sculpture, rather slopingly and narrowly tabulated at the top ;• 

 ribs numerous, about 20 on the penultimate, and 14 on the last 

 whorl, moderately thick, and very slightly reflexed, with short 

 angular spines at the angle. Last whorl short, rounded, without 

 basal ridge, and with the umbilicus nearly closed. Aperture 

 roundly oval ; interior brown ; peristome rather thick, smooth, 

 slightly expanded and reflexed at the left anterior side, the 

 posterior angle produced into a short angular spine. 



Length 1 5 ; width 6 millim. 



Hab. : — Cape St. Blaize bearing N. ; distant 7^ miles ; depth, 

 37 fathoms. Bottom, fine sand. Also, Lat. 34° 7' S., Long. 25° 

 43' 30" E. ; depth, 55 fathoms. Bottom, rock. 



Only two specimens of this species were taken, one in each of 

 the localities indicated. 



The shell is somewhat similar in form to 5. aaileata, but with 

 more angular whorls. The brown colour is rather unusual. 



AsTRALiUM (Cyclocantha) Gilchristi (Plate v., fig. 6). 

 Shell trochiform, slightly iridescent, the nacre being partly visible 

 ■on the surface through the very thin covering, promiscuously 

 spotted with reddish brown. Spire regularly conical, moder- 

 ately high ; whorls 6, sloping, scarcely convex, angularly keeled 

 above and below, ornamented with rather close-set rows of bead- 

 like pustules (6 on the penultimate whorl), interstices obliquely 

 roughly plicate on the penultimate and last whorls ; concavely 

 channelled below the suture, the channel obliquely plicated. 

 Last whorl with the peripherial angle armed with 16 hollow 

 angular spine-like scales ; angled below the periphery with a 

 narrow slightly-raised keel, which is furnished with numerous 

 very short scales ; between the two angles are two or three rows 

 of pustules, and beneath the second angle the base is slightly 

 flattened and furnished with 6 rows of pustules or beaded ridges. 

 The whole of the base is closely pHcately laminated. Umbili- 

 cus completly closed by a thick white callus. Aperture oblique, 

 rounded, width slightly exceeding the length ; columella obli- 

 quely arcuate, covered with a thick smooth white callus; outer 

 lip thin at the edge, interior smooth, silvery. 



Operculum sub-circular, very thick, convex outside, white, 

 very faintly granulose, with a very narrow groove at the outer 

 margin. 



Length 27^ ; width 29 millim. 



Hab.:— O'Neil Peak (Natal) bearing iN.W. i W. ; distant 9I 

 miles ; depth, 90 fathoms. Bottom, broken shens. Also, Scotts- 

 burg Lighthouse (Natal) bearing N.W. by N. ; distant 8 miles ; 

 ^depth, 92 fathoms. Bottom, sand and shells. 



