215 



out markings. Spire acutely turreted ; whorls 8, apical ones 

 smooth rounded oblique, the rest deeply and smoothly concave 

 at the top, then slightly convex, furnished with numerous oblique 

 rounded smooth close-set ribs, the ribs terminating in a well-de- 

 fined angle at the top. Last whorl about equal in length to the 

 spire, slightly convex above and tapering below ; spirally lirate 

 towards the base, scarcely rostrate. Aperture oblong, interior 

 smooth, brown ; columella rather straight ; lip thin, arched, with 

 a moderate posterior sinus situated close to the suture. 



Length 20 ; width 7 millim. 



Hab. : — Glendower Beacon (near Port Alfred) bearing N. ^ 

 W. ; distant 21 miles; depth, 100 fathoms. Bottom, sand and 

 stones. 



An elegantly formed and sculptured shell, somewhat resem- 

 bling P. harpiilaria, Desmoulins, but more fusiform, and with- 

 out the prominent sutural ridge characteristic of that species. 



Pleurotoma (Clavatula) turriplana (Plate III, fig. 6). 

 Shell elongately turreted, light brown, with a whitish band in the 

 middle of the whorls. Spire long, acutely turreted ; whorls 1 2 ; 

 the first two smooth, rounded, formmg a somewhat prominent 

 white papillary apex ; the rest slopingly convex, slightly impres- 

 sed below the suture, spirally faintly grooved, obliquely ob- 

 scurely plicated. Last whorl about 2.5ths of the entire length 

 ot the shell, convex above, attenuated towards the base, scarcely 

 rostrate, nearly smooth, spiral grooves (only visible with a lens) 

 irregular and broken up, oblique wrinkles aJmost obso- 

 lete. Aperture rather long, moderately wide ; interior 

 tinged with pale pink ; columella white, rather straight, very 

 slightly flexuose ; outer lip sharp, with a broad posterior sinus, 

 situated between the angle and the suture. 



Length 42 ; width 1 1 millim. 



Hab. : — Cape St. Blaize bearing N. by E. |- E. ; distant 65 

 miles ; depth, 8 5 -go fathoms. 



Only one adult and one young specimen. An unusually smooth 

 shell for one of this genus, with a long spire. The specimen 

 having no operculum, I am unable to say with certainty that it 

 belongs to the sub-genus Clavatula, but judging from the proto- 

 couch and the general appearance of the shell there is scarcely 

 room to doubt it. 



Pleurotoma (Clavus) lignaria (Plate III., fig. 4). Shell 

 irregularly fusiform, pallid, without colour markings, obtusely 

 angular, posterior acuminated, anterior rather obliquely sub- 

 conical. Spire rather long, acute ; whorls loi, the first two 

 smooth, rounded, forming a papillary apex ; the next two slightly 

 convex,, nearly smooth, the rest with the upper half slightly con- 



B 2 ' 



