P L E U R T M A. 



Plate XIII. 



Species 108. (Mus. Cuming.) 



Pleurotoma Vauquelini. Plenr. testa parvd, subtur- 

 ritd, lavi, pallid"? flavescente, longitudinaliter costatd, 

 costis tumidis, subdistantibus, fulvo spursim et obscure 

 punctatis ; anfractibus sex, supern'e cmgulatis ; labro 

 tumido, intus aculo ; canali brevi. 



Vauquelin's Pleurotoma. Shell small, slightly tur- 

 reted, smooth, pale yellow, longitudinally ribbed, 

 ribs swollen, rather distant from each, and painted 

 with scattered and obscure yellowish-brown dots ; 

 whorls six in number, angulated at the upper part ; 

 lip swollen, sharp inwardly ; canal short. 



Payrandeau, Moll, de Corse, p. 145. pi. 7. f. 14 & 15. 



Philippi, Enum. Moll. Sicilise. pi. 11. f. 19. 



Kiener, Icon. Coq. viv., pi. 26. f. 2. 



Hab. Mediterranean, Coast of Sicily, &c. 



Payrandeau describes the last whorl only of this shell 

 as being dotted ; the dots, however, which are confined 

 to the ribs, appear throughout the shell, and dashed in a 

 peculiar manner around the angle. In the specimen 

 before me, received by Mr. Cuming from M. Philippi, and 

 which is in excellent condition, the interstices between 

 the ribs are almost colourless. 



Species 109. (Fig. a & b, Mus. Cuming.) 



Pleurotoma Philippinensis. Pleur. testa ovato-tur- 

 ritd, ventricosd , subpellucidd, albidd ; anfractibus sex 

 septemve, longitudinaliter costatis, costis eximiis, 

 subcompressis, subdistantibus, nigro aut fusco alboque 

 vari& pictd ; transversim liratis, liris minutis, sub- 

 contiguis, numerosis ; columella subtortuosd ; aper- 

 turd ovatd, ampld ; canali brevissimo. 



The Philippine Pleurotoma. Shell ovately turreted, 

 ventricose, rather transparent, white ; whorls six 

 or seven in number, longitudinally ribbed, ribs very 

 delicate, rather compressed, somewhat distant from 

 each other, and variously painted with black or 

 brown and white ; transversely ridged, ridges mi- 

 nute, numerous and rather close together ; colu- 

 mella a little twisted ; aperture ovate, large ; canal 

 very short. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. Islands of Masbate and Luzon, Philippines (found 

 under stones at low water) ; Cuming. 



It is impossible to do justice, either by figure or de- 

 scription, to this very delicate and beautiful species, the 

 chief peculiarity of which is the black and opake white 

 irregularly-variegated blotching of the ribs. Several 

 specimens were collected by Mr. Cuming at the above- 

 mentioned islands, varying more or less in the number 

 and proximity of their ribs : one or two specimens have 

 as many as sixteen ribs on the last whorl, — twelve to 

 fourteen is the average number. 



Species 110. (Fig. a & b, Mus. Cuming.) 



Pleurotoma Cumingii. Pleur. testd ovato-elongatd, 

 subturritd, pallide rufo-stramined, maailis parvis, 

 saturatioribus, slriisque albidis elevatis equidistanti- 

 bus transversis ornatd ; anfractibus septem octove, 

 longitudinaliter costatis, costis leviter nodulosis, su- 

 perne et inferne evanidis ; columella spiraliter plicatd . 

 canali brevissimo, leviter recurvo ; labro tenui, acuto, 

 sinu parvo, distincto. 



Cuming's Pleurotoma. Shell ovately elongated, some- 

 what turreted, pale reddish straw-colour, orna- 

 mented with small spots of a deeper colour, and a 

 number of white, transverse, equidistant, raised 

 stria; ; whorls seven or eight in number, longitudi- 

 nally ribbed, ribs slightly nodulous, fading below, 

 and near the suture ; columella spirally plaited ; 

 canal very short and slightly recurved; lip thin, 

 acute, sinus small and distinct. 



Buccinum Cumingii, Powis, Pro. Zool. Soc, 1S35. 



Hab. Grimwood's Isle, Pacific Ocean (found on the 

 sands) ; Cuming. 



This and the two following species belong to a 

 section of Pleurotomse, which exhibit all the characters 

 of the Buccina excepting that which entitles them to 

 be Pleurotoma;. The labral sinus in this species is di- 

 stinct though small, and its progress may be traced 

 throughout the shell by the sinuated stria; which mark 

 that portion of each whorl next the suture. 



Species 111. (Fig. a & b, Mus. Cuming.) 



Pleurotoma Rissoides. Pleur. testd elongato-ora/i, 

 Imci, nitente, semipellucidd, albicante, fulvo pallidis- 

 simi nebulosr strigatd; anfractibus septem, triblts 



longitudinaliter p/icatis ; apice rubella ; columella 



June 1843. 



