FAMILY 3. MACROSTOMATA. 41 
Pl. CXLIX. Fig. 3. 
SroMATIA DUPLICATA, Sowerby, Genera of Shells, No. 19. 
Pl. CXLIX. Fig. 4. 
SromaTiA pHymotis, Lamarck, Anim. sans vert., vol. vi. p. 211. Enc. 
Méth., pl. 450. f. 5. a, 0. 
Haliotis imperforata, Chemnitz. 
Pl. CXLIX. Fig. 5. 
STOMATIA AURICULA, Sowerby, Genera of Shells, No. 19. Enc. Méth., 
pl. 450. f. 1. 
Patella lutea, Gmelin. 
Stomatella auricula, Lamarck. 
Pl. CXLIX. Fig. 6. 
SToMATIA PLANULATA, Sowerby, Genera of Shells, No. 19. Enc. Méth., 
pl. 450. f. 4. a, 6. 
Stomatella planulata, Lamarck. 
HALIOTIS, Linneus. 
Testa ovata vel oblongo-ovata, auriformis, plus minusve depressa, serie 
foraminum perforata ; intus margaritacea, prismatica, extus plerum- 
que rugosa aut corrugata; spira brevissima, sublaterali; apertura 
amplissima, columella szpissimé planulata. 
There are, perhaps, few genera of mollusks whose shells may be more 
readily distinguished than those of the Haliotides ; they were originally 
associated by Klein under the title of Auris, but this appellation was ex- 
changed by Linnzus for that which is now commonly adopted. The chief 
peculiarity of these animals is, that of having their shells perforated with 
a regular series of holes for the free passage of the water to the respiratory 
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