PLEUROTOMA. 



Plate II. 



Species S. (Mus. Stainforth.) 



Pleurotoma exasferata. Pleur. testa turritd, anfrac- 

 tibits in medio tuberculato-muricatis, iuberculis soli- 

 dis, acutis ; ulbd, anfractu ultimo zond fused cingu- 

 lato ; canali brevissimo ; columella albii , supernecal- 

 losd ; aperhirdfav.ee alba. 



The sharp-pointed Pleurotoma. Shell turrited, 

 whorls tuberculated round the middle, tubercles 

 solid and sharp ; white, last whorl encircled with 

 a clear, dark brown zone ; canal very short ; colu- 

 mella white, with a callosity at the upper part; 

 aperture white within. 



Hob. ? 



This interesting little shell resembles the Pleurotoma 

 wizowlis in being surrounded with a single clear dark 

 band ; but it differs, first, in being of a more turrited 

 form ; secondly, in having the whorls encircled with a 

 sharp row of tubercles instead of longitudinal ribs ; and 

 thirdly, in the columella and interior being white, 

 whereas in that species it is always brown. 



Species 9. (Mus. Stainforth.) 



Pleurotoma speciosa. Pleur. testa acute turritd, trans- 

 versim subtilissime funiculatd ; cceruleo-albd, funi- 

 culis pallid? ochraceis ; anfractibus in medio eximu 

 gemmatis, in/erne convexis, superne leviter concavis; 

 canali gracili, vix elongate 



The beautiful Pleurotoma. Shell sharply turrited, 

 very finely corded transversely ; bluish white, cords 

 pale bright ochre ; whorls delicately beaded round 

 the middle, convex below, rather concave beneath ; 

 canal slender, rather long. 



Hab ? 



This very chaste shell approaches somewhat in form 

 and general appearance to the Pleurotoma Kicneri ; it 

 is of a pale bluish ground, delicately corded and beaded 

 with bright ochraceous yellow. 



There is another exactly similar specimen in the col- 

 lection of Henry Inwood, Esq. 



Species 10. (Mus. Cuming.) 



Pleurotoma Beckii. Pleur. testa oblongd, cylindraceo- 

 attenuatd, upice acuta ; sexangulatd, anfractibus ad 



angulos longitudinaliter tuberculatis ; olivaceo-fuscd, 

 tuberculis tantum albis ,• columella et apertures fauce 

 fused : canali brevissimo. 

 Beck's Pleurotoma. Shell oblong, cylindrically at- 

 tenuated, sharp at the apex; six-angled, whorls 

 longitudinally tuberculated at the angles ; the en- 

 tire shell olive-brown except the tubercles, which 

 are white ; columella and interior of the mouth 

 brown ; canal very short. 

 Reeve, Zool. Proc., 184:2. Conch. Syst., vol. ii. p 234 



f. 11. 

 Hub. Bauang, Island of Luzon. 



I dedicate this pretty shell with much pleasure to the 

 learned curator of that noble patron of conchological 

 science, the King of Denmark. It was found by Mr. 

 Cuming in the locality above cited under stones at low 

 water. The snowy-white tubercles which ornament 

 this brown six-angled shell at the several angles are 

 very characteristic. 



Species 11. (Fig. a and b, Mus. Cuming.) 



Pleurotoma crispa. Pleur. testd fusiform/', transver- 

 sa// carinatd, albidd, lineo/is rubido-fuscis, longitudi- 

 nal/bits, interrupts, pietd ; anfractibus multicarinatis, 

 carinarum interstitiis imbricato-crispis ; canali elon- 

 gato. 



The crisped Pleurotoma. Shell fusiform, transversely 

 carinated, white, painted with reddish brown lon- 

 gitudinal lines ; whorls many-keeled, the interstices 

 between the keels being finely crisped or granulated ; 

 canal long. 



Lamarck, Anim. sans vert., vol. vii. p. 95. 



Enc. Meth., pi. 439. f. 4. 



Hub. Island of Masbate, Philippines. (Found on the coral 

 reefs at low water.) 



The shell which we have here figured from Mr. Cu- 

 ming's collection is undoubtedly the true Pleurotoma crispa 



of Lamarck, and not the large Chinese shell (Pleurotoma 

 grandis) referred to it by Kiener. Another, but inferior, 

 specimen of the same in the collection of Mr. Stainforth 

 agrees exactly with the figure in the 'Encyclopedic Mc- 

 thodique,' and a third specimen, collected by Mr. Cu- 

 ming himself in the locality above cited, removes all 

 doubt on the subject. The three specimens here spoken 

 of are each of the same uniform size, and the dark 



Jan. 1843. 



