PLEUEOTOMA.— Plate XXIII. 



Hab. Gulf of Papagayo, Central America (dredged from 

 sandy mud at a depth of from eight to fourteen fa- 

 thoms) ; Hinds. 

 A warm flesh-coloured shell with the outer lip a little 



expanded. 



Por Species 203 see Plate XXVIII., the specimen here re- 

 presented being a dark coloured example of the Pleuro- 

 toma nebula, Species 198. 



Species 201. (Mus. Cuming.) 



Pleurotoma exarata. Pleur. testa pyramidali, anfrac- 

 tibus transversim granoso-striatis, medio leviter angu- 

 latis, ad unguium, minute nodulosis, inter nodulis longi- 

 tudinaliter exaratis ; canali brevissimo, truncato ; sitiu 

 amplo; pallide fitlvd, sulcis longitudinalibus fusco- 

 punctatis. 



The ploughed Pleurotoma. Shell pyramidal, whorls 

 transversely granosely striated, slightly angulated in 

 the middle, minutely noduled at the angle, longitu- 

 dinally grooved between the nodules; canal very 

 short, truncated, sinus large; pale fulvous colour, 

 longitudinal grooves dotted with brown. 



Reeve, Pro. Zool. Soc, 1845. 



Hab. ? 



The nai-row longitudinal grooves in this species are very 



characteristic. 



Species 202. (Mus. Belcher.) 



Pleurotoma gravis. Pleur. testa fusiformi, anfractibus 

 superne plano-depressis, angulatis, luberculis parvis ad 

 unguium seriatim cinctis, canali longiusculo ; rubido- 

 fuscd, corned, tuberculis albidis, apertures fauce fused. 



The heavy Pleurotoma. Shell fusiform, whorls flatly 

 depressed at the upper part, angulated, encircled at 

 the angle with small tubercles, canal rather long; 

 reddish-brown, horny, tubercles white ; interior of the 

 aperture brown. 



Hinds, Moll. Voy. Sulphur, p. 16. pi. 5. f. 6. 



Hab. L'Agulhas Bank, Cape of Good Hope (dredged from 

 the depth of forty-three fathoms) ; Hinds. 



A stout dark horny looking shell. 



Species 204. (Mus. Hinds.) 



Pleurotoma robusta. Pleur. testa ovato-turritd, spira 

 acuminata, anfractibus supeme angulatis, ad unguium 

 costatis, transversim elevato-striatis ; labro crenato, sinu 

 amplo ; canali brevi ; albidd. 



The robust Pleurotoma. Shell ovately turreted, spire 

 acuminated, whorls angulated at the upper part, rib- 

 bed at the. angle, transversely elevately striated; lip 

 crenated, sinus large ; canal short ; whitish. 

 Clavatula robusta, Hinds, Moll. Voy. Sulphur, p. 17. 

 pi. 5. f. 12. 



Hab. Hong-Kong, China (found in sandy mud at a depth 

 of from four to seven fathoms) ; Hinds. 



This species is quite colourless, and it is a curious cir- 

 cumstance that China shells mostly are ; Scalaria pretiosa, 

 Isocardia Moltkiana, Murex pinnatus, Venus thiara, for 

 example. 



Species 205. (Mus. Cuming.) 



Pleurotoma vittata. Pleur. testa abbreviato-ovatd, so- 

 lidd, gibbosd, spira subacuminatd, anfractibus superni 

 depressis, medio plicato-tuberculatis, infra gramdatis ; 

 labro incrassato, sinu latiuscido ; albidd, viltd fascidve 

 lutescente-fuscd compicud supra tuberculos ornatd. 



The riband-bound Pleurotoma. Shell abbreviately 

 ovate, whorls depressed at the upper part, plicately 

 tubercled round the middle; granulated beneath; lip 

 thickened, sinus rather broad ; whitish, ornamented 

 above the tubercles with a conspicuous yellowish 

 brown riband or band. 



Peeve, Pro. Zool. Soc, 1845. 



Hab. ? 



A stout gibbous shell, remarkable, independant of any 



peculiarity of form, for its contrast of colour. 



