P L E U R T M A. 



Plate XXXV. 



(Magnified to about twice their length.) 



Species 316. (Mus. Taylor.) 



Pleurotoma livida. Pleur. testa ovatd, subventricosd, 

 tenui, lieritjatii, had truncate; hit us extusque livido- 

 fuscd; labro simplici, sinu lato. 



The livid Pleurotoma. Shell ovate, somewhat ventri- 

 cose, thin, smooth, truncated at the base ; livid 

 brown within and without ; lip simple, sinus broad. 

 Defrancia livida, Moller. 



Hab. Greenland. 



A thin, smooth, dull brown semitransparent shell. 



Species 317. (Mus. Gray.) 



Pleurotoma cancellata. Pleur. testa pyramidali, an- 

 fractibus superne carhiatis, transversim temissime ///-li- 

 tis, liris striis VmgitudinaWms cancellatis, aperturd 

 parvd ; aterrimd, liris sordid* alb'is. 



The cancellated Pleurotoma. Shell pyramidal, whorls 

 keeled at the upper part, transversely very finely 

 ridged, ridges cancellated with longitudinal stria?, 

 aperture small ; jet black, ridges dirty white. 



Gray, MSS. (private cabinet). 



Hab. Island of St. West Indies ; Guilding. 



Species 318 (Mus. Cuming.) 



Pleurotoma Hondurasensis. Pleur. testa oblongo-ova- 

 td, spird acuta, anfractibus rotundatis, nodoso-costatis . 

 cinereo luleoque alternatim fasciald ; labro incrassato. 



The Honduras Pleurotoma. Shell oblong-ovate, spire 

 sharp, whorls rounded, nodosely ribbed ; alternately 

 banded with yellow and ash-colour ; lip thickened. 



Reeve, Pro. Zool. Soc, 1S46. 



Hab. Honduras ; Dyson. 



A very characteristic species. 



Species 319. (Mus. Cuming.) 



Pleurotoma eenestrata. Pleur. testa fusiformi-ovatd, 

 subinflate, tenui, pellucidd, anfractibus rotimdis, liris 

 superficiariis subdistantibus undique clalhralis, labro 

 simplici, sinu latiusculo ; pellucido-albd, aurantio pal- 

 lide tiiictd. 



The windowed Pleurotoma. Shell fusiformly ovate, a 

 little inflated, thin, pellucid; whorls round, latticed 

 throughout with rather distant superficial ridges, lip 

 simple, sinus rather broad ; transparent white, faintly 

 stained with orange. 



Eeeve, Pro. Zool. Soc., 1816. 



Hab. Island of Mindoro, Philippines ( found among coral 

 sand at the depth of nine fathoms ) ; Cuming. 



The lattice sculpture is more apparent towards the apex. 



Species 320. (Mus. Cuming.) 



Pleurotoma striolata. Pleur. testa aUenuato-fudformi, 



aiifraclibits longitudinaliter costatis, costis angustis, 

 elevatis, subdistantibus, transversim subtilissime stria- 

 tes ; fulvo-favescente, zona nigra angustd cingulatd. 



The finely striated Pleurotoma. Shell attenuate^ 

 fusiform, whorls longitudinally ribbed, ribs narrow, 

 elevated, rather distant, transversely veiy finely stri- 

 ated ; fulvous yellow, encircled with a narrow black 

 zone. 



Scacchi; Philippi, Enum. Moll. Sicd. vol. 2. p. 168. 



Hab. Mediterranean. 



Approximating somewhat in form to the P. attenuata 



Species 321. (Mus Cuming.) 



Although apparently distinct, the single specimen here 

 figured is so much worn that I must hesitate to describe 

 it as new. 



Species 322. (Mus. nost.) 



Pleurotoma septangularis. Pleur. testa subulate, 

 hcrigatd, anfractibus swperne obtuse semicostatis, et 

 septangularibus, labro valde incrassato ; roseo-albicante. 



Thr septangular Pleurotoma. Shell subulate, smooth, 

 whorls obtusely ribbed and septangular on the upper 

 half, lip very much thickened; pinkish white. 



Murex septangularis, Montagu, Testacea Britannica, p. 268. 

 pi. 9. f. 5. 



llih. Britain. 



January 1S16. 



