PLEUROTOMA. 



Plate XXIII. 



(Figures magnified.) 



Species 196. (Mus. Belcher.) 



Pleurotoma paedalis. Pleur. testa ovatd, subobtusd, 

 longitudinaliter costellatd, costellis undatis, interstitiis 

 striata ; aperturd oblongd ; labro intus acunilato ; ca- 

 nali brevi ; fusco-nigricaute, costellis conspicue fulvis. 



The panther Pleurotoma. Shell ovate, rather obtuse, 

 longitudinally ribbed, ribs small, waved, interstices 

 striated ; aperture oblong, lip crenulated within ; ca- 

 nal short; blackish brown, ribs conspicuously ful- 

 vous-yellow. 



Clavatula partialis, Hinds, MoD. Voy. Sulphur, p. 22. 

 pi. 7. f. 1. 



Hah. Gulf of Nicoya (found under stones at low water) ; 

 Hinds. 



The waved fulvous ribs upon a very dark brown ground 

 give a characteristic striped appearance to the shell. 



Species 197. (Mus. Belcher.) 



Pleurotoma occata. Pleur. testa attemcato-ovatd, sub- 

 fusiformi ; anfractibus longitudinaliter ungulate costa- 

 tis, costis grandibus, transversim exaratis ; aperturd 

 angustd; canali brevi, corned, Jlavicante. 



The harrowed Pleurotoma. Shell attenuately ovate, 

 somewhat fusiform ; whorls longitudinally angularly 

 ribbed, ribs large, transversely furrowed; aperture 

 narrow ; canal short ; horny, yellowish. 

 Clavatula occata, Hinds, Pro. Zool. Soc, 1845. 



Hab. Magnetic Island, West Coast of Veragua ; Hinds. 



A solid shell, distinguished by its broad furrowed ribs 

 and attenuated form. 



Species 198. (Mus. Cuming.) 



Pleurotoma nebula. Pleur. testa oblongo-turritd, an- 

 fractibus superue panlulum depressis, longitudinaliter 

 costatis, costis lavibm, oblusis, interstitiis transversim, 

 striatis; aperturd parvd ; sinu lata ; canali brevissimo, 

 truncato ; corneo-fuscescenle, subpellucidd. 



The fog Pleurotoma. Shell oblong turreted, whorls a 

 little depressed at the upper part, longitudinally rib- 

 bed, ribs smooth, obtuse, interstices transversely stri- 



ated ; aperture small ; sinus broad ; canal very short, 

 truncated ; dull homy brown, somewhat transparent. 

 Murex nebula, Montagne, Test. Brit., pi. 16. f. 6. 

 Ilab. Britain. 



A dull horny looking shell, and a decided Pleurotoma. 



Species 199. (Mus. Belcher.) 



Pleurotoma pudica. Pleur. testa fusiformi, acuminata, 

 anfractibus superne depressis, lavibus, infra, costatis, 

 costis obliqnis, acutis, anfractiis ultimi dorso obsoletis ; 

 aperturd ovatd, canali longiusculo ; sinu amplo, pro- 

 fundo ; fuscescente, nitidissimd, anfractiis ultimi dorso 

 macula ampld rubido-castaned picto. 



The chaste Pleurotoma. Shell fusiform, acuminated, 

 whorls depressed at the upper part, smooth, ribbed 

 beneath, ribs oblique, sharp, obsolete on the back of 

 the last whorl; aperture ovate; canal rather long; 

 sinus broad, deep ; pale brown, very shining, back of 

 the last whorl painted with a large reddish-chesnut 

 spot. 



Clavatula pudica, Hinds, Moll. Voy. Sulphur, p. 20. 

 pi. 6. f. 11 and 12. 



Hab. Gulf of Papagayo, Central America (dredged from 

 mud at a depth of from eight to fourteen fathoms) ; 

 Hinds. 



A pretty glittering shell, the last whorl of which is 

 smooth and clouded with a large reddish-chesnut spot. 



Species 200. (Mus. Belcher.) 



Pleurotoma impressa. Pleur. testa fusiformi, acumi- 

 nata, anfractibus tuleroulato-codatis, costk obliquis, 

 interstitiis transversim striatis, anfractiis ultimi dorso 

 leevigalo; canali brevi; si mi amplo; albido-camed, 

 costis albidis. 



The impressed Pleurotoma. Shell fusiform, acumi- 

 nated, whorls tubcrcularly ribbed, ribs oblique, inter- 

 stices transversely striated, back of the last whorl 

 smooth, canal short ; sinus large ; pale flesh-colour, 

 ribs whitish. 



Clavatula impressa, Hinds, Moll. Voy. Sulphur, p. 21. 

 pi. 6. f. 23, 24. 



October 1845. 



