P L E U R T M A. 



Plate XVI. 



Species 128. (Mus. Stainforth.) 



Pleurotoma triticea. Pleitr. testd ovatd, albidd, fusco 

 sparsim et pallide tinctd ; anfractibus longitudinaliter 

 costatis, costis obliijuis, subdistantibus, transversim 

 exi/iter striatis ; spin! brcviusculd ; aperturd ovato- 

 oblongd, labro incrassato, sinu lato. 



The grain-of-corn Pleurotoma. Shell oval, whitish, 

 sparingly and faintly stained with brown ; whorls 

 longitudinally ribbed, ribs oblique, very finely stri- 

 ated transversely; spire rather short; aperture ovate- 

 ly oblong, lip thickened, sinus broad. 



Kiener, Icon., pi. 27. f. 3. 



Hub. Indian Ocean ; Kiener, 



A delicate little shell, in which one whorl appears to 

 sink, as it were, into the other. It approaches some- 

 what in form to the P. Vauquelini, and belongs to that 

 group formerly distinguished by Dr. Leach, and in the 

 present day by Mr. Gray and Mr. Hinds, under the ge- 

 neric title of Mangelia. 



Species 129. (Mus. Cuming.) 



Pleurotoma Philberti. Pleur. testd fusiformi-turritd, 

 rubidd out purpureo-nigricante, interdum albi-balte- 

 atd; anfractibus subrotundatis, costis longitudinalibus, 

 lineisque elevatis confertim clathratd ; labro intus ex- 

 illter denticulato, ca/uili breviusculo. 



Philbert's Pleurotoma. Shell fusiformly turrited, 

 reddish or purple-black, sometimes encircled with 

 a narrow white belt ; whorls somewhat rounded, 

 closely latticed with longitudinal ribs and trans- 

 verse raised lines ; lip finely denticulated within, 

 canal rather short. 



Michaud, Bui. Soc. Linn, de Bordeaux, pi. 3. f. 2 and 3. 



Kiener, Icon., pi. 24. f. 4. 



Pleurotoma variegata, Philippi. 



Hub. Mediterranean. 



A much smaller and darker- coloured shell than the 

 P. purpurea, but so closely allied in other respects that 

 it might almost be considered as a variety of that species. 



Species 130. (Mus. Stainforth.) 

 Pleurotoma nitida. Pleur. testd ovatd, subobesd, Icevi, 

 nitidd ; luteold, lineis fuscis subdistantibus transver- 

 sim pictd ; anfractibus levitcr convexis, apicem ver- 

 sus eximie plicatd ; spied acuminata, stipend rosacea; 

 labro simplici, in medio levitcr coarctalo; canali In I i. 

 The shining Pleurotoma. Shell ovate, rather stout, 

 smooth, shining ; yellowish, painted across with ra- 

 ther distant brown lines ; whorls slightly convex, 



delicately plaited towards the apex ; spire acumi- 

 nated, rose-tinted towards the top ; lip simple, 

 slightly contracted in the middle ; canal short. 



Kiener, Icon., pi. 27. f. 4. 



Hab. Mauritius ; Kiener. 



This species is remarkably distinct from any that I am 



acquainted with. 



Species 131. (Mus. Gray.) 



Pleurotoma Leufroyi. Pleur. testd subovato-fusifarmi, 

 tenui, inflatd ; anfractibus costellis longitudinalibus, 

 lineisque transversis elevatis, confertis, ornatis; lu- 

 teo-fuscescentibus, maculis parvis rubidofuscis hie et 

 illic variegatis, fasciam medianam pallidum relin- 

 quentibus ; labro intus incrassato, lacteo ; canali bre- 

 viusculo. 



Leufroy's Pleurotoma. Shell rather ovately fusiform, 

 thin, inflated ; whorls ornamented with longitudinal 

 ribs crossed transversely by close raised lines ; pale 

 yellowish-brown, variegated here and there with 

 reddish-brown spots, leaving a pale central band ; 

 lip thickened, white within ; canal rather short. 



Michaud, Bui. Soc. Linn, de Bordeaux, pi. 2. f. 5 and 6. 



Kiener, Icon., pi. 24. f. 3. 



Pleurotoma inflata, Cristoforis ; Philippi. 



Hab. Mediterranean. 



The central pale band is tipped round the upper part 



of it with a narrow belt of opake white. 



Species 132. (Mus. Cuming.) 



Pleurotoma clavata. Pleur. testd acuminalo-pyrami- 

 dali, solidd, roseo-albicante ; anfractibus lievibus, 

 longitudinaliter costatis, costis subdistantibus, in medio 

 subobsolet'e tuberculatis, tuberculis fuscescente-incar- 

 natis ; aperturd brcvi, lutiuscu/d ; sinu lato, pro- 

 fundo ; canali brevissimo. 



The club-shaped Pleurotoma. Shell acuminately 

 pyramidal, solid, white, tinged with very faint warm 

 rose-colour ; whorls smooth, longitudinally ribbed, 

 ribs rather distant, somewhat obsoletely tubercu- 

 lated in the middle, tubercles stained with pale dingy 

 flesh-colour ; aperture short, rather wide ; sinus 

 broad and deep ; canal very short. 



Sowerby, Pro. Zool. Soc, 1833. 



Hab. Xipixapi, West Columbia (found in sandy mud at 

 the depth of ten fathoms) ; Cuming. 

 The last whorl of this shell, being rather stout and 



solid in the middle, imparts a club-shape to the shell, 



which is verv characteristic. 



August 1S43. 



