FAMILY 10. PURPURIFERA. 225 
the Buccina, and Lamarck subsequently established the genus we have 
here adopted; it is, however, now referred by Duclos and Kiener to a 
place amongst the Purpure. The Concholepas unquestionably exhibits 
many good distinguishing characters, and it is remarkable that only one 
species has been discovered. 
The shell of Concholepas may be described as being ovate, with only a 
very small, short spire ; the last whorl is slightly canaliculated at the base, 
and very widely inflated, the aperture being extraordinarily large, equal 
indeed to the size of the entire shell; the columellar lip is flat and re- 
flected, and the outer lip, which is continuous with it, is armed with three 
blunt, dentiform processes at the lower part, analogous in some measure 
to the labral tooth of the Monocert. The operculum is horny. 
Example. 
Pl. CCLXII. 
Concnotepas Peruviana, Lamarck, Anim. sans vert., vol. vii. p. 253. 
Chemnitz, Conch., vol. x. p. 320. Vignette 25. f. AB. 
Le Grand Concho-Lepas, Argenville. 
Concho-Patella, Chemnitz. 
Patella lepas, Gmelin. 
Buccinum concholepas, Bruguiére. 
Purpura concholepas, Kiener. 
HARPA, Lamarck. 
Testa ovalis, ventricosa, ad basem emarginata; spira brevi, apice elato, 
acuto; anfractibus plus minusve longitudinaliter costatis; costis 
parallelis, politis, mucrone acutissimo sepé superné armatis ; aper- 
tura oblonga, ampla ; columella subexpansa, levissima, nitida ; labro 
externo incrassato, costam ultimam formante. Operculum nullum. 
The genus Harpa, which includes the most elegant of the long series 
VOL. II. 2G 
