PLEUROTOMA.— Plate XIV. 



costis striis transversis elevatiusculis decussatis ; 

 aperturd brevi, subrotundatd ; canali brevi, suitor- 

 tuoso ; labro valde incrassato, varicoso, intus acuto, 

 sinu rotundato. 



The thick-lipped Pleurotoma. Shell ovately turreted, 

 yellowish, variously zoned with blue and brown ; 

 whorls convex, smooth near the suture, tubercu- 

 larly ribbed beneath, ribs crossed with rather 

 elevated transverse strise ; aperture short, rather 

 rounded ; canal short, rather twisted ; lip very much 

 thickened, swollen, sharp within, sinus rounded. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. Island of Ticao, Philippines (found on the reefs) ; 

 Cuming. 



Variety ft. (Fig. 118 a.) 



Testa incolorata, striis transversis fere obsoletis. 



Shell without colour, transverse striae nearly obso- 

 lete. 



Hab. Island of Masbate, Philippines (dredged from sandy 

 mud at the depth of seven fathoms) ; Cuming. 



The blue and brown colouring of the first variety is 

 very conspicuous between the ribs. The var. ft, which 

 is colourless, seems to have a thin epidermis upon it. 



Species 119. (Mus. Cuming.) 



Pleurotoma Hindsii. Pleur. testd ovatd, subinfiatd, 

 albidd, fuscescente pa/lid'e variegatd; anfractibus 



costis dvabus, ultimo costis quatuor, distantibus, cin- 

 gulatis, costellis numerosis, compressis, exiniie can- 

 cellatis ; aperturd ovatd ; canali brevi. 



Hinds's Pleurotoma. Shell ovate, rather inflated, 

 white, faintly variegated with pale brown ; whorls 

 encircled with two distant ribs, the last whorl with 

 four ribs, and delicately cancellated with numerous 

 compressed smaller ribs ; aperture ovate ; canal 

 short. 



Reeve, Pro. Zool. Soc, 1S43. 



Hab. Baclayon, Island of Bohol, Philippines (found under 

 stones on the reefs at low water) ; Cuming. 



This beautifully cancellated shell is closely allied to the 

 P. tricostata (Plate XV.) ; the ribs, however, are more in 

 number and less prominent. Each whorl exhibits four 

 transverse ribs on its formation, the two lower being 

 concealed in all but the last whorl by the lodgement of 

 one whorl upon the other. The cancellated spaces 

 formed over the surface of the shell by the longitudinal 

 ribs crossing the transverse ones seem slightly concave, 

 and have a very characteristic appearance. 



By the above title I wish to honour and keep in re- 

 membrance the name of my liberal friend Richard 

 Brinsley Hinds, Esq., R.N., on account of the services 

 he is at this moment rendering to conchological science 

 by his cautious examination and description of the new 

 shells collected by Capt. Sir Edward Belcher and him- 

 self during the late prolific expedition of H.M.S. 

 Sulphur. 



