PLEUROTOMA. 



Plate XVII. 



Species 138. (Mus. Cuming.) 



Pleurotoma digitale. Pleur. testa obeso-oblongd, ni- 

 gerrimo-fuscescente, apicem versus tricolor atd; an- 

 fractibus convexis, tuberculis albidis minutis seriatim 

 clathratis ; aperturd breviusculd, sinu Into. 



The thimble Pleurotoma. Shell stoutly oblong, 

 blackish brown, discoloured towards the apex ; 

 whorls convex, finely latticed with a number of mi- 

 nute whitish pimples arranged in rows ; aperture 

 rather short, sinus broad. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. Island of Bureas, Philippines (found under stones 

 at low water) ; Cuming. 



The sculpture of this shell reminds one of the pimpled 

 surface of a thimble. 



Species 139. (Mus. Powis.) 



Pleurotoma hastula. Pleur, testd elongato-fusiformi, 

 solidiusculd, albidd, fuscescente sparsim maculatd ; 

 anfractibus liris subtilissimis numerosis cinctis, lira 

 centrali lirisque superis majoribus, prominent ibus ; 

 canali gracili, fissura profunda. 



The little javelin Pleurotoma. Shell elongately 

 fusiform, rather solid, whitish, sparingly spotted 



I with light brown ; whorls encircled with a number 

 of very fine ridges, the centre and two upper of 

 which are large and prominent ; canal slender, slit 

 deep. 

 Reeve, Pro. Zool. Soc, 1843. 

 Hab. ? 



This species is chiefly characterized by the stout 

 double ridge that encircles each whorl near the suture, 

 and by the central ridge that is formed in place of the slit 

 as the shell advances in growth. 



Species 140. (Mus. Powis.) 



Pleurotoma cuprea. Pleur. testd acuminata -turrit d, 

 anfractibus superne depressis, fuscescentibus, liris no- 

 dulosis, subflexuosis, distantibus. longitudinalibus, or- 

 natis ; aperturd brevi, sinu lata. 



The copier Pleurotoma. Shell acuminately turrited, 

 whorls depressed near the suture, light brown, or- 



namented with rather flexuous, distant, nodulous 

 longitudinal ridges ; aperture short, sinus broad. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. ? 



The little dark brown flexuous ridges, passing down 

 the whorls of a much lighter brown, have a neat and 

 conspicuous appearance. 



Species 141. (Fig. a & b, Mus. Cuming.) 



Pleurotoma varicosa. Pleur. testa acuminato-turritd, 

 anfractibus superne lavibus, infra longitudinaliter 

 costatis, costis subir regular ibus, griseis, interstitiis 

 griseo-caruleis, transversim striatis, varicibus rudibus 

 lutescentibus grandibus sparsis peculiariter notatis ; 

 canali brevissimo, leviter recurvo ; sinu lato, subpro- 

 fundo. 



The varicose Pleurotoma. Shell acuminately tur- 

 rited, whorls smooth near the suture, longitudinally 

 ribbed beneath, ribs rather irregular, greyish, in- 

 terstices greyish blue, transversely striated, pecu- 

 liarly marked with large rude scattered varices ; 

 canal very short, slightly recurved ; sinus broad 

 and rather deep. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. Calapan, Island of Mindoro, Philippines (found in 

 coarse sand at the depth of fifteen fathoms) ; Cu- 

 ming. 



Variety /3. 

 Testa omninb fusca. 

 Shell entirely brown. 



Hab. Island of Corrigidor, Philippines (found in coarse 

 sand at the depth of six fathoms) ; Cuming. 



This species may be easily recognised by its promi- 

 nent display of varices. 



Species 142. (Mus. Taylor.) 



Pleurotoma Indica. Pleur. testd elongato-turritd, fu- 



siformi, griseo-albidd ,ftammis fuscescentibus pallidis- 

 simis ornatd; anfractibus transversim striatis, supern'c 

 concavis, lird duplici in medio cinctis, liris minoribus 

 numerosis infra ; aperturd angustd, fissura profunda ; 

 canali elongato. 

 The Indian Pleurotoma. Shell elongately turrited, 



November 1843. 



