MOLLUSCA. 807 
Sp. Purpura ricinus, Murex Ricinus L., Ricinula arachnoides Lam., Enc. 
méth., Vers. Pl. 395, fig. 3;—Ricinula horrida Lam., Buatnv. Malac. Pl. 
22, fig. 2, &e. 
Purpura Lam. Aperture dilated, with columella short. 
Sp. Purpura persica Lam., Buccinum persicum L., Rumen. Amb. Rariteith. 
Tab. 27, fig. B, Buatnv. Malacol. Pl. 24, fig. 3. (Most of the species 
belong to this division, of which fossil species also occur.) 
(Monoceros Lam. differs from the Purpure by a conical tooth at the in- 
ternal margin of labrum. Sp. Purpura monodon, Monoceros imbricatum 
Lam., Buccinum monodon GMEL., Buatnv. Malac. Pl. 22, fig. 3, &e. 
Concholepas Lam. Vertex not spired, inclined obliquely towards 
labium. Aperture longitudinal, oblique, very ample. 
Sp. Purpura concholepas nob., Concholepas peruvianus D’ARGENV. Conch. 
Pl. 2, fig. D, Buatnv. Malacol. Pl. 24, fig. 1, Lesson Jllustr. de Zool. Pl. 
27 (a figure with the animal). This singular shell, which at first sight 
might be taken for a single conch of a bivalve, was received by GMELIN 
into the thirteenth edition of the Syst. nat. under the name of Patella lepas. 
Harpa Lam. Shell ovate, turgid, with longitudinal parallel 
ribs. Aperture oval, terminating at the apex in an excised sinus. 
Columella levigato-gibbous, oblique. Spire short. Animal with 
foot large, semicircular anteriorly, and operculum none. ‘Tentacles 
conical, incrassate at the base, oculiferous on the outside. 
Sp. Harpa imperialis Lam., Buccinum costatum L., D’ARGENV. Conchyl., 
Append, Pl. 2, fig. F, CHEMN. Tab. 152, fig. 1452;—Harpa ventricosa 
Lam., Buccinum Harpa L, (in part), Encycl. méth., Vers. Pl. 404, fig. 1, 
GuERIN Iconogr., Moll. Pl. 18, fig. 1, Comp. REYNAUD Observations sur 
CAnimal de la Harpe, Mém. de la Soc. d’Hist. nat. de Paris, v. 1834, pp. 
33—40, Pl. 3. 
Dolium Lam, Shell thin, ventricose, smooth, surrounded by 
transverse ribs. Aperture longitudinal, terminated anteriorly by a 
sinus. Columella oblique. Labrum transversely crenate. Spire 
short. Foot large, without operculum: 
Sp. Doliwm perdix Lam., Buccinum Perdixz L., D’ARGENV. Conchyl. Tab. 
17, fig. A, Martini Tab. 117, fig. 1079, GuéiRin Iconogr., Moll. Pl. 17, 
fig. 10, Cuv. R. Ani., éd. ill., Moll. Pl. 54, fig. 2;—Doliwm galea Laq., 
Buccinum galea L., Martini Tab. 116, fig. 1070, Pout Zest. utr. Sic. U1. 
Pl. 47, figs. 3, 4; a gigantic species from the Mediterranean Sea. 
Buceinum L. (excl. many spec.), LAm. (add genus Nassa LAm.). 
Shell ovate or ovato-conical, gibbous. Aperture longitudinal, 
emarginate by a sinus towards the apex. Operculum horny. 
