PLEUROTOMA. 



Plate XX. 



Species 1G6. (Mus. nob.) 



EUROTOMA rosacea. Pleur. testa ovato-turritd, an- 

 fractibus rotundatis, superne depresso-concavis, trans- 

 versim subtiliter striatis, longitudinaliter crebricostatis ; 

 canali brevissimo ; dim lato, subamph ; undique eximie 



rosacea. 



IE pink Pleurotoma. Shell ovately turreted, whorls 

 rounded, depressly concave round the upper part, 

 transversely finely striated, longitudinally closely rib- 

 bed ; canal very short; sinus broad, large ; delicate 

 rose-coloiu- throughout. 



IvE, Pro. Zool. Soe., 1845. 



I.. ? 



This shell, of which I have seen another specimen in the 



flection of Mr. Burt, is of one uniform pink colour. 



Species 167. (Mus. nob.) 



.EUROTOMA BiETiCA. Pleur. testa turritd, anfractibus 

 superne depresso-concavis, transversim elevato-striatis, 

 oblique costatis, costis plicato-nodulosis ; canali brevis- 

 simo; sinu lato, amplo ; bteticd. 



HE dark rrown Pleurotoma. Shell turreted, whorls 

 depressly concave round the upper part, transversely 

 elevately striated, obliquely ribbed, ribs plicately no- 

 duled ; canal very short ; sinus broad, large ; dark 

 brown. 



eeve, Pro. Zool. Soe., 1845. 



r ab. ? 



Of a dark shining chesnut-browu colour. 



Species 168. (Mus. nob.) 



LEUROTOMA OBLIQ.UI-COSTATA. Pleur. testa ovato-vb- 



longd, longitudinaliter costatd, costis angustis, obliquis, 

 subundatis, superne obtuse mucronatis; canali brevis- 

 simo ; albidd, rubido-fusco parol maculatd, et variegatd. 



'he obliquely-ribbed Pleurotoma. Shell ovately 

 oblong, longitudinally ribbed, ribs narrow, oblique, a 

 little waved, obtusely pointed at the upper part; ca- 

 nal very short; white, spotted and variegated here 

 and there with reddish-brown. 



Ieeve, Pro. Zool. Soe., 1S4 5. 



J«4. ? 



Although this shell has scarcely attained its full measure 

 of growth it exhibits characters that I nave not observed 

 in any other species. 



Species 169. (Mus. Gruner.) 



Pleurotoma fucata. Pleur. testa ovatd, crassiusculd, 

 anfractibus superne depressiuscidis, longitudinaliter cos- 

 tellatis, cos/el/is, mbobtum, striis transversa elevatis 

 subobsoletis caneellaMs, anfractu ultimo tuberculo gib- 

 boso miinito; canali brevissimo; labro superne subsi- 

 nuato; alia, croceo-fusceseentefasciatdet variegatd. 



The stained Pleurotoma. Shell ovate, rather thick, 

 whorls slightly depressed round the upper part, lon- 

 gitudinally ribbed, ribs small, rather obtuse, cancellated 

 with somewhat obsolete raised striae, last whorl fur- 

 nished with a gibbous tubercle ; canal very short ; 

 lip slightly sinuated at the upper part; white, banded 

 and variegated with yellowish brown. 



Peeve, Pro. Zool. Soe, 184-5. 



Hub. ? 



The last whorl of this species has a swollen callosity at 



the back, after the manner of the Pleurotoma gibbosa of 



larger size. 



Species 170. (Mus. nob.) 



Pleurotoma implicata. Pleur. testa pyramidali-turritd, 

 anfractibus superne peculiariter depressis, infra seriatim 

 nodosis, nodulorum serve supremd transversim bilirata . 

 canali brevissimo; aperturd brevi ; albidd, epidermide 

 corned olivaced undique indutd. 



The enveloped Pleurotoma. Shell pyramidally tur- 

 reted, whorls peculiarly depressed round the upper 

 part, encircled with rows of nodules beneath, upper- 

 most row of nodules festooned with two close narrow 

 transverse ridges; canal very short ; aperture short, 

 whitish, covered throughout with a thick olivaceous 

 horny epidermis. 



Peeve, Pro. Zool. Soe., 18 I. V 



Bab. ? 



A species well distinguished by the marked depression 



of the whorls, and the festooned pair of ridges between the 



uppermost nodules. 



October 1S45. 



