PLEUKOTOMA.— Plate XXII. 



Species 191. (Mus. Gray.) 



Pleurotoma castanea. Pleur. testa subelongato-turritd, 

 anfractibus superne concavis, medio plicato-nodosis ; 

 lavigatd, basi subtiliter sulcata; canali brevissimo ; 

 castaneo-fuscd. 



The chesnut Pleurotoma. Sliell somewhat elongately 

 turreted, whorls concave at the upper part, plicately 

 nodose round the middle ; smooth, finely grooved at 

 the base ; canal very short ; chesnut-brown. 



Reeve, Pro. Zool. Soc, 1845. 



Hab. ? 



A light chesnut-brown shell, with a row of oblique pli- 

 cated nodides encirclinjr, the middle of each whorl. 



Species 192. (Mus. Cuming.) 



Pleurotoma vidua. Pleur. testa subobeso-ovatd, spird 

 acuminata, anfractibus superne depressis, medio plicato- 

 nodosis, nodis crebris, longitudinaliter confiuentibus ; 

 laevigata, basem versus granosd ; canali brevissimo; an- 

 fractuum parte superiori nived, inferiori olivaceo-nigri- 

 cante, granis albis. 



The widowed Pleurotoma. Shell rather stoutly ovate, 

 spire acuminated, whorls depressed at the upper part, 

 pbcately nodided in the middle, nodules close-set, 

 flowing down ; smooth, granuled towards the base ; 

 canal very short ; upper part of the whorls snowy 

 white, lower part olive-black, granules white. 



Peeve, Pro. Zool. Soc, 1845. 



Hab. Island of Masbate, Philippines (found at low water); 

 Cuming. 



A species of interesting form and easily recognisable by 

 its vivid contrast of colour. 



Species 193. (Mus. Cuming.) 



Pleurotoma palliata. Pleur. testa ovato-oblongd, an- 

 fractibus convexiusculis, transversim subtilissime crebri- 

 striatis,granuloriiM serieunicd cingulatis, granulis con- 

 spicnis, elevatiusculis ; canali brevissimo ; aliidd, epi- 

 dermide pallide fulvd undique indutd. 



The clothed Pleurotoma. Shell ovately oblong, whorls 

 rather convex, transversely very finely closely striated, 

 encircled with a single row of conspicuous rather ele- 

 vated granules ; canal veiy short ; whitish, covered 

 with a pale fulvous epidermis. 



Reeve, Pro. Zool. Soc, 1845. 

 Hab. ? 



Each whojl of this species is encircled with a sharp row 

 of granules, and the shell is clothed with an epidermis of 

 very peculiar character and colour. 



Species 194. (Mus. Cuming.) 



Pleurotoma variculosa. Pleur. testa pyramidali, gra- 

 cili, acuminata, anfractibus rotundatis, superne Itevibus, 

 carina subtilissimd juxta suturam cingulatis, longitu- 

 dinaliter suboblique granoso-costatis, striis elevatis de- 

 cussatis ; canali breviusczdo ; sinu amplo, rotundato ; 

 p urp urascente-fuscd. 



The little-veined Pleurotoma. Shell pyramidal, slen- 

 der, acuminated, whorls rounded, smooth at the up- 

 per part, encircled with a veiy fine keel next the su- 

 ture, longitudinally rather obliquely granosely ribbed, 

 crossed by raised striae ; canal rather short ; sinus 

 large, rounded ; purplish-brown. 



Sowerby, Pro. Zool. Soc, 1833. 



Hab. Bay of Montija, South America (found in sandy mud 

 at the depth of ten fathoms) ; Cuming. 



A slender delicately formed species in which the longi- 

 tudinal ribs have a close varix-like appearance. 



Species 195. (Mus. Belcher.) 



Pleurotoma cinerea. Pleur. testa ovatd, acuminata, 

 anfractibus superne depressis, Icevibus, transversim stri- 

 atis, longitudinaliter costatis, costis superne tubercn- 

 latis, anfractiis ultimi infeme bifidis, spires suturd cre- 

 natd; columella labroque intus crenulatis ; canali bre- 

 viusculo ; sinu amplo ; cinereo-fulvd. 



The ashy Pleurotoma. Shell ovate, acuminated, whorls 

 depressed at the upper part, smooth, transversely 

 striated, longitudinally ribbed, ribs tuberculated at 

 the upper part, those of the last whorl divided into 

 two towards the lower ; suture of the spire crenated ; 

 lip and columella crenulated within ; canal rather 

 short, sinus large ; ashy fulvous colour. 

 Clavatula cinerea, Hinds, Moll. Voy. Sulphur, p. 18. 

 pi. 6. f. 3. 



Hab. ? 



Distinguished by the crenated suture of the spire and 

 bifid termination of the ribs as seen on the last whorl. 



