PLEUROTOMA.— Plate XXXIII. 



The pierced Pleurotoma. Shell fusiformly ovate, very 

 closely latticed with narrow longitudinal and trans- 

 verse striae, yellowish. 



Reeve, Pro. Zool. Soc, 1845. 



Hab. ? 



A close deeply-latticed shell. 



Species 302. (Mus. Cuming.) 



Pleukotoma efficta. Plenr. testa ovatd, spira brevins- 

 culd, acuminata, longitudinaliter subconcentrice costatd, 

 costis striis elevatis cancellatis ; aperturd subampld, 

 labro incrassato, sinu latiusculo. 



The engraved Pleurotoma. Shell ovate, spire rather 

 short, acuminated, longitudinally somewhat concen- 

 trically ribbed, ribs cancellated with raised striae ; 

 aperture rather large, lip thickened, sinus rather 

 large. 



Reeve, Pro. Zool. Soc, 1845. 



Hab. ? 



Very like one of the minute species of Triton. 



Species 303. (Mus. Cuming.) 



Pleurotoma cavernosa. Pleur. testa oblongd, spira 

 angulato-turritd, anfractibus superne subangidatis, lon- 

 gitudinaliter costatis, costis distaniibtis, liris angustis 

 elevatiusculis transversis clatJiratis, anfractu ultimo 

 prope basem peculiariter cavemoso ; fused, liris costas 

 super albicantibus. 



The cavernous Pleurotoma. Shell oblong, spire an- 

 gularly turreted, whorls slightly angulated round the 

 upper part, longitudinally ribbed, ribs distant, latticed 

 with narrow raised transverse ridges, last whorl pecu- 

 liarly cavernous near the base ; brown, ridges whitish 

 on the ribs. 



Reeve, Pro. Zool. Soc. 1845. 

 Hab. Philippine Islands ; Cuming. 



Remarkable on account of its having a deep cavernous 

 groove around the base. 



Species 304. (Mus. Cuming.) 



Pleurotoma Polynesiensis. Pleur. testa acuminato- 

 turritd, anfractibus parvis, rotundatis, longitudinalita 

 crebricostatis, transversini striatis ; labro incrassato 

 sinu amplo ; albicante. 



The Polynesian Pleurotoma. Shell acuminately tur 

 reted, whorls small, round, longitudinally closely rib' 

 bed, transversely striated ; lip tliickened, sinus large 

 whitish. 



Reeve, Pro. Zool. Soc, 1845. 



Hab. Lord Hood's Island ; Cuming. 

 May be distinguished by its little numerous rounded 



whorls 



Species 171. (Mus. Gray) 



Pleurotoma apicata. Pleur. testa oblongo-ovatd, an 

 fractibus superne concavis, subtilissime unicarinatis 

 infra nodoso-plicatis, plicis inferne evanidis, transver 

 sim impresso-striatis ; columella callositate superne mu 

 nitd ; luted, apice rnfescente. 



The tufted Pleurotoma. Shell oblong-ovate, whorl 

 concave round the upper part, encircled with a ver 

 fine keel, nodosely plaited beneath, plaits fading awa; 

 towards the lower part, transversely impressly striated 

 columella furnished with a callosity at the upper part 

 pale yellow, reddish at the apex. 



Gray, MSS. (private cabinet). 



Hab. ? 



A peculiarly coloured shell, yellow with pink apex, witl 



a marked concavity round the whorls next the sutures. 



