PLEUROTOMA.— -Plate XVI. 



Species 133. (Mus. Walton.) 



Pleurotoma incisa. Pleur. testa elongato-oblongd, so- 

 lidd, acuminata, fulvd ; anfractibus leviter convexis, 

 striis solidis, elevatis, longitudinalibus, subobliquis, 

 ornatd, interstitiis profundi incisis ; aperturd bre- 

 visshnd, subrotundatd, sinu lato, profundo ; canali 

 brevissimo. 



The carved Pleurotoma. Shell elongately oblong, 

 solid, acuminated, yellowish-brown or buff; whorls 

 slightly convex, ornamented with solid, raised, lon- 

 gitudinal, rather oblique striae, the interstices being 

 deeply cut ; aperture very short, nearly round, with 

 the sinus broad and deep ; canal very short. 



Reeve, Pro. Zool. Soc, 1843. 



Hub. ? 



This species may be easily recognised by the close-set, 

 deeply cut, longitudinal striae or fine ridges, which evenly 

 cover the entire surface of the shell. 



Species 134. (Mus. Belcher.) 



Pleurotoma pallida. Pleur. testd acuminata -turrit a, 

 alba; anfractibus subrotundatis, creberrimi costellatis, 

 costellis confertis, interstitiis transversim exiliter sul- 

 catis ; aperturd brevi, sinu lato, profundo ; canali 

 brevissimo, subrecurvo. 



The pale Pleurotoma. Shell acuminately turreted, 

 white ; whorls somewhat round, very sharply ribbed, 

 ribs close, interstices very finely grooved across ; 

 aperture short, sinus broad and deep ; canal very 

 short, a little recurved. 



Sowerby, Pro. Zool. Soc, 1833. 



Hab. Puerto Portrero, Central America (found on a 

 sandy muddy bed at the depth of thirteen fathoms) ; 

 Cuming. 



The specimen here represented, collected by Mr. 

 Hinds, is about twice the size of any of those originally 

 brought by Mr. Cuming. 



Species 135. (Mus. Stainforth.) 



Pleurotoma zebra. Pleur. testd ovato-oblongd, rubido- 

 fuscd ; anfractibus superne unicarinatis , in medio 

 tuberculorum serie duplici cingulatis, tuberculis par- 

 vis, albis, co7npressis, anfractu ultimo inferni gra- 

 nuloso-striato ; aperturd elongato-ovali, labro incras- 

 sato, sinu parvo ; canali brevissimo . 



The zebra Pleurotoma. Shell ovately oblong, red- 

 dish-brown ; whorls encircled round the upper part 

 with a single keel, round the middle with a double 

 row of small white compressed tubercles, lower 

 portion of the last whorl granulously striated ; aper- 

 ture elongately oval, lip thickened, sinus small ; 

 canal very short. 



Kiener, Icon., pi. 23. f. 3. 



Buccinum zebra, Lamarck. 

 Hab. Mauritius ; Kiener. 



Lamarck was unable to discover the generic character 

 of this shell, on account of his specimens being so en- 

 tirely worn and broken. 



Species 136. (Mus. Stainforth.) 



Pleurotoma purpurea. Pleur. testd elongatd, fusco- 

 purpured ; anfractibus subrotundatis, costellis longi- 

 tudinalibus striisque elevatis transversis, confertis, 

 exiliter clalhratis ; aperturd ovato-oblongd, labro in- 

 tus lacteo, sinu parvo ; canali breviusculo. 



The purple Pleurotoma. Shell elongated, brownish- 

 purple ; whorls somewhat rounded, finely latticed 

 with close-set longitudinal ribs and transverse 

 raised stria? ; aperture ovately oblong, lip white 

 within, sinus small ; canal rather short. 



De Blainville, Faune Franc., pi. 4. f. 10. 



Kiener, Icon., pi. 25. f. 3. 



Murex purpureas, Montague. 

 Pleurotoma corbis, Michaud. 



Hab. Mediterranean. 



Kiener observes that this well-known shell is the 

 Mangelia purpurea of Risso ; it does not however belong 

 to that section of the genus so distinguished by Dr. 

 Leach. 



Species 137. (Mus. Gray.) 



Pleurotoma Quoyi. Pleur. testd ovato-oblongd, fla- 

 vescente ; anfractibus in medio nodulorum serie du- 

 plici cingulatis (nodulis parvis, compressis), supra 

 concavo-depressis.funiculosubnodu/osopropesuturam 

 superatis (funiculo maculis rubidis quadratis regula- 

 riter picto) ; infrii liratis, lirarum interstitiis eximi'e 

 striatis ; aperturd oblongo-ovatd, intus fuscescente ; 

 canali brevissimo. 



Quoy's Pleurotoma. Shell ovately oblong, yellowish ; 

 whorls encircled round the middle with a double 

 row of small compressed nodules, concavely de- 

 pressed above, surmounted with a slightly nodulous 

 cord, regularly painted with square equidistant red- 

 dish-brown spots ; lower part of the whorls trans- 

 versely ridged, interstices between the ridges finely 

 striated ; aperture oblong-ovate, interior pale 

 brown ; canal very short. 



Des Moulins, Rev. de Pleur., p. 61. 



Pleurotoma monile, Valenciennes ; Kiener. 



Hab. New Holland. 



I adopt the name proposed for this shell by M. Des 

 Moulins, in consequence of its former title having been 

 already used by Brocchi in reference to a fossil species. 

 There are several specimens of it in the British Museum. 



