MOLLUSCA. 807 



Sp. Purpura ricinus, Murex Ricinus L., Ricinula arachnotdes LAM., Enc. 

 meth., Vers. PI. 395, fig. 3; Ricinula horrida LAM., BLAINV. Malac. PI. 

 22, fig. 2, &c. 



Purpura LAM. Aperture dilated, with columella short. 



Sp. Purpura persica LAM., Buccinum persicum L., RUMPH. ^w6. Rariteitk. 

 Tab. 27, fig. E, BLAINV. Malacol. PI. 24, fig. 3. (Most of the species 

 belong to this division, of which fossil species also occur.) 



(Monoceros LAM. differs from the Purpurce by a conical tooth at the in- 

 ternal margin of labrum. Sp. Purpura monodon, Monoceros imbricatum 

 LAM., Buccinum monodon GMEL., BLAINV. Malac. PI. 22, fig. 3, &c. 



Concholepas LAM. Vertex not spired, inclined obliquely towards 

 labium. Aperture longitudinal, oblique, very ample. 



Sp. Purpura concholepas nob., Concholepas peruvianus D'ARGENV. Conch. 

 PI. 2, fig. D, BLAINV. Malacol. PI. 24, fig. i, LESSON Illustr. de Zool. PI. 

 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 Sysl. 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 Isevigato-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. PI. 2, fig. F, CHEMN. Tab. 152, fig. 1452; Harpa ventricosa 

 LAM., Buccinum Harpa L. (in part), Encycl. meth., Vers. PI. 404, fig. i, 

 GUERIN Iconogr., Moll. PI. 18, fig. i. Comp. REYNAUD Observations sur 

 V Animal de la Harpe, Mem. de la Soc. d'Hist. nat. de Paris, V. 1834, pp. 

 3340, PI. 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. Dolium perdix LAM., Buccinum Perdix L., D'ARGENV. Conchyl. Tab. 

 17, fig. A, MARTINI Tab. 117, fig. 1079, GtofiBiN Iconogr., Moll. PL 17, 

 fig. 10, Cuv. R. Ani., ed. ill., Moll. PI. 54, fig. i; Dolium galea LAM., 

 Buccinum galea L., MARTINI Tab. 116, fig. 1070, POLI Test. utr. Sic. in. 

 PI. 47, figs. 3, 4 ; a gigantic species from the Mediterranean Sea. 



Buccinum L. (excl. many spec.), LAM. (add genus 

 Shell ovate or ovato-conical, gibbous. Aperture longitudinal, 

 emarginate by a sinus towards the apex. Operculum horny. 



