PLEUROTOMA. 



Plate VII. 



Species 50. (Mus. Stainforth.) 



Pleurotoma suturalis. Pleur. testd f us if or mi , turritd, 

 flavido-fuscd, alio brunneoque fasciatd, anfractibus 

 subrotundatis, superne depressis, longitudinaliter cos- 

 tatis, transversim tenuissinie striatis ; aperturd oblon- 

 gd, canali subrecurvo. 



Fiik sutural Pleurotoma. Shell fusiform, turrited, 

 yellowish brown, banded with white and brown ; 

 whorls somewhat rounded, depressed next the su- 

 ture, longitudinally ribbed, transversely very finely 

 striated; aperture oblong, canal a little recurved. 



Bronn, Erg. mei. nat. Reise, vol. ii. p. 556. 



Philippi, Enum. Moll. Sicil., p. 197. 

 Pleurotoma Comarmondi, Michaud. 

 Murex gracilis, Montague. 

 Murex oblongus, Brocchi. 



Hab. Mediterranean Sea, Coast of Britain, &c. 



This is undoubtedly the well-known Murex gracilis of 

 British authors. 



Species 51. (Mus. Walton.) 



Pleurotoma interrupta. Pleur. testa turrito-subulatd, 

 longitudinaliter costatd, costis Itevibus, subdistantibus ; 



transversim striatd, pallide fused, costis rufis ; an- 

 fractibus superne unicarinatis ; canali brevi, subre- 

 curvo . 



The interrupted Pleurotoma. Shell sharply tur- 

 rited, longitudinally ribbed, ribs smooth and rather 

 distant ; transversely striated, pale brown, ribs red- 

 dish brown ; whorls encircled round the upper part 

 with a single keel ; canal short, a little recurved. 



Lamarck, Anim. sans vert., vol. vii. p. 92 ; Enc. Meth., 

 pi. 43S. f. 1. a, b. 



Hab. ? 



Chiefly characterized by the smooth reddish-looking 

 distant ribs. 



form, smooth, yellowish brown ; whorls many- 

 keeled, middle keel the largest, with a beaded row 

 of granules immediately over it ; canal rather short. 



Hinds, Pro. Zool. Soc, 1843. 



Hab. China Seas and Straits of Malacca (found in mud 

 at the depth of eighteen fathoms) ; Hinds. 



The little row of granules -which encircles every whorl 

 above the centre keel is exactly similar to that which in 

 great measure distinguishes the PI. modesta of Sowerby 

 from the PI. cincta of Lamarck. 



Species 52. (Mus. Belcher.) 



Pleurotoma jubata. Pleur. testa acuminato-fusiformi, 

 Itevigatd, flavido-brunned ,• anfractibus multicarinatis, 

 carina medid maxima, serie unicd granulorum su- 

 perne cinctd ; canali breviusculo. 



The crested Pleurotoma. Shell acuminatcly fusi- 



Species 53. (Mus. Cuming.) 



Pleurotoma rudis. Pleur. testa turritd, crassd, niger- 

 rimo-fuscd ; anfractibus medio coarctatis, supra in- 

 friique tuber culatis, tuberculis inferioribus superne 

 albo-maculatis ; anfractu ultimo subexcentrico ,- ca- 

 nali brevi; labro tenui, sinuoso, callosilate supra sinu 

 armato. 



The rustic Pleurotoma. Shell turrited, thick, very 

 dark brown, almost black ; whorls contracted in the 

 middle, tuberculated above and below, each of the 

 lower tubercles having a white spot above it ; last 

 whorl rather out of the centre ; canal short ; lip 

 thin, sinuous, armed above the sinus with a strong 

 callosity. 



Sowerby, Pro. Zool. Soc, 1833, p. 134. 



Hab. Monte Christi, West Columbia (found under 

 stones) ; Cuming. 



Species 54. (Mus. Stainforth.) 



Pleurotoma crenularis. Pleur. testd acutissime tur- 

 ritd, transversim striata ; anfractibus su/nrni it in- 

 ferne griseo-violaceis, mediant nodoso-crcnu/atis, nodis 

 albis ; suturis marginatis ; canali breviusculo. 



The ckenulatedPleurotoma. Shell very sharply tur- 

 rited, transversely striated; upper and lower por- 

 tion of the whorls greyish violet, middle crenulated 

 with white knobs ; sutures marginated ; canal ra- 

 ther short. 



Lamarck, Anim. sans vert., vol. vii. p. 92. 



Hab. Tranquebar. 



This shell, according to Lamarck, is the Clavatula cre- 



March 1843. 



