P L E U R T M A. 



Plate XXXIII. 



(All magnified to three times their natural length.) 



Species 296. (Mus. nost.) 



Pleurotoma linearis. Pleur. testa ovatd, subfusiformi, 

 aufractibus rolundatis,fortiler longitudinaliter costatis, 

 costis n-odulosis ; albidd, liueis subtilibus castaneis ciu- 

 gulatd, labri Umbo violaceo. 



Tbe linear Pleurotoma. Shell ovate, somewhat fusi- 

 form, whorls rounded, strongly longitudinally ribbed, 

 ribs nodulous ; whitish, encircled with very fine ches- 

 nut-brown lines, edge of the lip tinged with violet. 



Murex linearis, Montagu, Test. Brit. p. 261. pi. 9. f. 4. 



Pleurotoma concinna, Scacchi. 



Eab. Britain. Mediterranean. 



A very characteristic shell, encircled with fine conspi- 

 ;uous brown lines which appear in the interstices between 

 ;he ribs. 



Species 297. (Mus. Gray.) 



Pleurotoma trifasciata. Pleur. testa subfusiformi- 

 ovatd, basi leviter contractu; aufractibus superne sub- 

 planiilatis, longitudinaliter creberrime subtilissirue cos- 

 tatis, transversim impresso-slriatis ; alhidd, liueis trib/ts 

 aurantio-fuscis cingulatd; labro subincrassalu, sinu 

 distincto. 



Ihe three-banded Pleurotoma. Shell somewhat fu- 

 siformly ovate, slightly contracted at the base ; whorls 

 a little flattened round the top, longitudinally very 

 closely ribbed, transversely impressly striated ; whitish, 

 encircled with three fine orange-brown lines ; lip ra- 

 ther thickened, sinus distinct. 



Gray, MSS. (private cabinet). 



Eab. ? 



Encircled with three fine lines, cnly the first of which 

 appeal's on the upper whorls. 



Species 298 (Mus. Gray.) 



Pleurotoma costata. Pleur. testa oblongo-ovald, siib- 

 fusiformi, anfractibut superne subplanulatis, 'longitudi- 

 naliter rrrberrimii costatis, transversim impresso-s/riu- 

 lis; labro leviter iucrassaio, sinu distincto ; aliidd, 

 lutescente pattide fasciatd. 



The ribbed Pleurotoma. Shell oblong-ovate, some- 



what fusiform, whorls a little flattened round the up- 

 per part, longitudinally very closely ribbed, trans- 

 versely impressly striated ; Lip slightly thickened, 

 sinus distinct, whitish, banded with pale yellow. 



Gray, MSS. (private cabinet). 



Sab. Island of St. Vincent, West Indies. 



Approximates rather to the former species, but of a dif- 

 ferent form and wanting the band-like lines. 



Species 299. (Mus. nost.) 



Pleurotoma coccinata. Pleur. testa ovatd, apicem 

 versus acuminata, aufractibus lavigatis, superne con- 

 cavis, infra, plicato-nodosis ; basi truncatd; albd, inter 

 nodes dorsoque cocciuald. 



The scarlet-stained Pleurotoma. Shell ovate, acu- 

 minated towards the apex, whorls smooth, concave 

 round the upper part, plicately nodose beneath ; base 

 truncated; white, stained with rose-scarlet on the 

 back and between the nodules. 



Beeve, Pro. Zool.Soc., 1845. 



Eab. ? 



Peculiarly stained with bright rose-scarlet. 



Species 300. (Mus. Cirming.) 



Pleurotoma vitrea. Pleur. testa cylindraceo-elongatd, 

 basi leviter contractu, tenui, pellucidd, vitred, laevigata, 

 anfractihus superne et iuferne suhtilhsime sulcatis ; 

 alhidd. 



The glassy Pleurotoma. Shell cylindrically elongated, 

 slightly contracted at the base, thin, pellucid, glassy, 

 smooth, whorls very finely grooved round the upper 

 and lower parts ; whitish. 



Beeve, Pro. Zool. Soc, 1845. 



Eab. Singapore and Island of Mindanao, Philippines (found 

 at depths of seven and twenty-five fathoms) ; Cuming. 



A very peculiar transparent glassy shell. 



Species 301. (Mus. Metcalfe.) 



Pleurotoma foraminata. Pleur. tesld fusiformi-ovatd, 

 liris angmtis longitudinalibui et Iransversis crei» 

 clathralis ; lutescente. 



December 1S45. 



