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MOLLUSCA. 809 
Mitra Lam. Shell mostly fusiform, with apex acute. Folds 
of columella suboblique, transverse, decreasing forwards. Aper- 
ture narrow, broader anteriorly, terminated by a deep oblique sinus 
ascending upwards. Animal with tentacles oculiferous externally at 
the sides or at base ; exsert proboscis surpassing the shell in length. 
a) With spire elongate. 
Sp. Mitra episcopalis Lam., Voluta mitra L. (in part), Rumer. Amb. Rari- 
teitk, Tab. 29, fig. K, D’ARGENVILLE Conchyl. Pl. 9, fig. ©, BLAINy. 
Malacol. Pl. 28 bis, fig. 1, Krmner Cog. viv., Columellaires, Mitre, Pl. 1. 
fig. 1 (fig. with the animal) ;—Mitra vulpecula Lam., Voluta Vulpecula L., 
GuséRIN Iconogr., Moll. Pl. 17, fig. 1. 
b) With spire shorter. (Habitus nearly of Conus.) Conohelix SWAINs., 
Sowerby, Jmbricaria SCHUMACHER. 
Sp. Mitra dactylus Lam., Voluta Dactylus L., Buatnv. Malacol. Pl. 28 bis, 
fig. 3, GuiRin Iconogr., Moll. Pl. 17, fig. 2. 
Marginella LAM. (with addit. of several spec. of Volvaria ejusd.). 
Shell ovato-oblong, smooth, with short spire. Aperture scarcely 
sinuate. Columella with folds transverse, oblique, subequal. La- 
brum incrassated externally. 
Sp. Marginella faba, Voluta Faba L., Encyel. méth., Vers. Pl. 377, fig. 1, 
Buiatnv. Malac. Pl. 30, fig. 5, &e. 
Terebellum LAM. Shell convolute, subcylindrical, with apex 
acute. Aperture longitudinal, narrow, broader towards the end, 
terminated by sinus. Columellar margin produced with apex 
truncated beyond labrum. (Animal with tentacles filiform, oculife- 
rous at the point.) 
Sp. Terebellum subulatum, Bulla terebellum L., RuMeH. Amb. Rariteitk. Tab. 
30, fig. s, Buarnv. Malac. Pl. 27, fig. 1, ADAMS and L. Reeve Mollusca 
of the Voyage of H.M.S. Samarang, 1848, Pl. 1x. fig. 6 (a fig. of the animal 
with the shell) in the Ind. Ocean. Terebellum convolutum Buatnvy. 1. 1. 
fig. 2 a fossil species from the calcaire grossier. 
Columbella Lam. Shell oval, spire short. Aperture emargi- 
nate towards the end. Labrum gibbous internally, often denticu- 
late, narrowing the aperture. 
Columbella rustica LAM., Voluta rustica L., Poxt Test. utr. Sic. m1. Pl. 
46, figs. 39—41;—Columbella strombiformis L., Buatnv. Malac. Pl. 30, 
fig. 5, &e. 
Ancillaria LAM. Shell oblong, smooth. Aperture longitudinal, 
sinuate towards the end. Columella tumid, contorted. Spire short, 
with sutures of wreaths not canaliculate. 
