PLEUROTOMA.— Plate XXVI, 



Clavatula quisqualis, Hinds, Moll. Voy. Sulphur, p. 19. 

 pi. 6. f. 5, 

 Hab. Gulf of Papngayo, Central America (found in mud at 

 the depth of from eight to fourteen fathoms); Hiuds. 



Bright and colourless, with a broad rounded sinus. 



Species 231. (Mus. Belcher.) 



Pleurotoma spicata. Pleur. testa, fusiformi, anfractibus 

 octonis, costulcdis, transversim striatis, costulis subacu- 

 tis ; suturd granulosa, ; canali brevi ; albidd, anfractiis 

 ultinii dorm fusco picto. 



The spiked Pleurotoma. Shell fusiform, whorls eight 

 in number, ribbed, transversely striated, ribs small, 

 rather sharp ; suture granulous ; canal short ; whitish, 

 back of the last whorl painted brown. 

 Clavatula spicata, Hinds, Moll. Voy. Sulphur, p. 17. 

 pi. 5. f. 13. 



Hab. Bow Island (among fine coral sand) ; Hinds. 



The name of spicata, appears to have been suggested by 

 the sharp termination of the ribs. 



Species 232. (Mus. Gray.) 

 Pleurotoma Grayi. Pleur. testa ovatd, subventricosd, 



anfractibus superne angulatis, longitudinaliter obtuso- 



costatis, transversim creberrime sulcatis; canali brevi; 



labro incrassato, sinu amplo ; castaneo-fuscd. 

 Gray's Pleurotoma. Shell ovate, a little ventricose, 



whorls angulated at the upper part, longitudinally 



obtusely ribbed, transversely very closely grooved ; 



canal short ; lip thickened, siuus large ; chcsnut 



brown. 

 Reeve, Pro. Zool. Soc, 1845. 

 Hab. ? 



An interesting little species for which I am indebted 

 to Mr. Gray. 



Species 233. (Mus Belcher). 



Pleurotoma scalaris. Pleur. testa fusiformi, acumi- 

 nata, anfractibus septenis, rotundatis, scalariformibus, 

 transversim striatis; costulis rotundatis, distantibus, 

 suturam incurrentibus ; labro crenato ; canali brevi. 



The ladder Pleurotoma. Shell fusiform, acuminated, 

 whorls seven in number, rounded, ladder-like, trans- 

 versely striated ; ribs rounded, distant, running into 

 the sutures ; lip arched ; canal short. 

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

 pi. 6. f. 2. 



Hab. Straits of Macassar (found among coarse sand at the 

 depth of twelve fathoms) ; Hinds. 



The ribs or rather varices of this species are not much 

 unlike those of Scalaria, mi min g into the suture in the 

 same peculiar manner. 



Species 234. (Mus. Belcher). 



Pleurotoma retusa. Pleur. testa obeso-ovald, anfracti- 

 bus septenis, costulatis, transversim striatis ; costulis 

 rotundatis, confertis ; spird conicd ; columella contorta 

 canali breviusculo ; aurantiacd, apice purpurea. 



The blunt Pleurotoma. Shell stoutly ovate, whorls 

 seven in number, ribbed, transversely striated, ribs 

 rounded, close-set ; spire conical, columella twisted ; 

 canal rather short ; orange, purple at the apex. 

 Clavatula retusa, Hinds, Moll. Voy. Sulphur, p. 24. 

 pi. 7. f. 16. 



Hab. Straits of Macassar (from among sand at the depth 

 of ten fathoms) ; Hinds. 



A short stout shell with the whorls depressly hollowed 

 round the upper part. 



Species 235. (Mus. Gray). 



Pleurotoma nigrescens. Pleur. testa subpyramidali, 

 anfractibus superne nnicarinatis, infra creberrime cos- 

 tatis ; aperturd parvd, siuu amplo, canali brevissimo ; 

 fusco-niffficaute. 



The blackish Pleurotoma. Shell somewhat pyramidal, 

 whorls encircled round the upper part with a mi- 

 nute keel, very closely ribbed beneath, aperture small, 

 sinus large ; canal very short ; brownish black. 



Gray, MSS. (Private cabinet). 



Hab. St. Vincents, West Indies ; Guilding. 



A small solid dark shell, having a sharply acuminated 

 spire with somewhat the sculpture of P. fuscescens. 



