P L E U R T M A. 



Plate V. 



Species 29. (Mus. Stainforth.) 

 Pleurotoma obesa. Pleur. testd obeso-fusiformi, spird 

 turritd, anfractibus luteolis, superne albis, lineis ful- 

 vis, obliquis, longitudinaliter venosis; labro acuto, sinu 

 subcentrali; canali mediocri, brevi, subitb ftemoso. 

 The stout Pleurotoma. Shell stoutly fusiform, spire 

 turrited ; whorls yellowish, white round the upper 

 part, longitudinally veined with fine yellow lines ; 

 lip acute, sinus nearly central ; canal middling, 

 short, suddenly twisted. 

 Reeve, Pro. Zool. Soc, 1843. 



Hab. ? 



On referring to the figure which accompanies the 

 above description, it will be seen that my PI, obesa is 

 not the shell figured in Conch. Syst., vol. ii. pi. 235. f. 5. 

 from Sowerby's " Genera," as I at first supposed. The 

 figure alluded to is of such large dimensions, that I could 

 not recognise it as representing a yellow variety of the 

 PI. lineata ; and as a proof of its liability to be mis- 

 understood, I may add that Kiener supposes it to be 

 intended for his PI. fulminata. 



Species 30. (Mus. Stainforth.) 



Pleurotoma gibbosa. PI. testa elongalo-turritd, einered ; 

 anfractibus superne leviter concavis, longitudinaliter 

 plica tis, striisque decussatis; anfractiis ultimi plicis 

 in costel/as confuentibns, dorso tuberculi gibboso, 

 spadiceo notato ; labro subexpanso, sinu lata, pro- 

 funda ; canali brevissimo, leviter recurvo. 



The swollen Pleurotoma. Shell elongately turrited, 

 ash-coloured ; whorls slightly concave round the 

 upper part, longitudinally plaited, decussated with 

 stria? ; plaits of the last whorl flowing down like 

 small ribs, back of the last whorl marked with a 

 dark chestnut-coloured swollen tubercle ; lip rather 

 expanded, with the sinus, broad and deep ; canal 

 very short, a little recurved. 



Kiener, Icon., pi. 12. f. 2. 



Murex gibbosus, Chemnitz, Conch., vol. xi. pi. 190. 



Hab. ? 



Lamarck does not seem to have been acquainted with 

 this shell; the PL unimaculata, a newly discovered species 

 (vide pi. C. f. 42.), is a light, elegant fac-simile of it. 



Species 31. (Mus. Cuming.) 

 Pleurotoma muricata. Pleur. testd ovato-conicd, tu- 



berculiferd, striis decussatd, epidermide o/ivaceo-v : 

 ridi indutd; anfractibus superne concavis, luberculis 

 cuspidalis seriatim cincta '; canali brevi, leviter re- 

 curvo. 



The prickly Pleurotoma. Shell ovately conic, tuber- 

 culous, decussated with striae, covered with an 

 olive-green epidermis ; whorls concave round the 

 upper part, encircled with a row of spear-shaped 

 tubercles ; canal short, slightly recurved. 



Lamarck, Anim. sans vert., vol. vii. p. 91. 



Kiener, Icon., pi. 17. f. 2 and 2 o. 



Pleurotoma conica, Enc. Meth., pi. 439. f. 9. a, b. 

 Murex mitra, Wood, Ind. Test. Supp., pi. 5. f. 5. 



Hab. Mouth of the Gambia ; Lieut. Shaw. 



This shell, which has a remarkably strong epidermis, 

 is sometimes faintly tinged with violet in the ulterior. 



Species 32. (Mus. Stainforth.) 



Pleurotoma virginea. PI. testd fusiformi-turritd, pal- 

 lida luteold; anfractibus in medio angulatis, luberculis 

 minutis albis seriatim cinctis ; anfractu ultimo multi- 

 seriatim granuloso ; canali mediocri, leviter recurvo. 



The chaste Pleurotoma. Shell fusiformly turrited. 

 pale yellowish colour ; whorls angulated in the 

 middle, encircled with a series of very small white 

 tubercles ; last whorl encircled with several series 

 of granulations ; canal middling, slightly recurved. 



Beck MSS., Museum of the King of Denmark. 



Hab. Mouth of the Gambia ; Lieut. Shaw. 



This shell, though comparatively common in our col- 

 lections, does not appear to have been hitherto described. 

 It is an interesting species, but scarcely merits the very 

 refined title that has been applied to it, 



Species 33. (Mus. Hankey.) 



Pleurotoma imperialis. Pleur. testd solidd, abbreviato- 

 fusiformi, ventricosd, epidermide o/ivacai, crassd, 

 imliitii ; anfractibus superne squamis complicatis, brr- 

 vibus, i/in/si tuberculis, seriatim cinctis ; canali bre- 

 vissimo, recurvo ; apcrturd oblongo-ovatd, fauce en- 

 caustird, superne et infernt purpureo-tinctd. 



The imperial Pleurotoma. Shell solid, of a shortened 

 fusiform shape, ventricose, covered with a thick, 

 dark, olive-coloured epidermis ; whorls encircled 



Feb. 1843. 



