From the branch Mollusca, he mentions numerous comb-shaped scallops, hooflike spiny oysters piled on top of each other, triangular coquina, three-pronged glass snails with yellow fins and transparent shells, orange snails from the genus Pleurobranchus that looked like eggs spotted or speckled with greenish dots, members of the genus Aplysia also known by the name sea hares, other sea hares from the genus Dolabella, plump paper-bubble shells, umbrella shells exclusive to the Mediterranean, abalone whose shell produces a mother-of-pearl much in demand, pilgrim scallops, saddle shells that diners in the French province of Languedoc are said to like better than oysters, some of those cockleshells so dear to the citizens of Marseilles, fat white venus shells that are among the clams so abundant off the coasts of North America and eaten in such quantities by New Yorkers, variously colored comb shells with gill covers, burrowing date mussels with a peppery flavor I relish, furrowed heart cockles whose shells have riblike ridges on their arching summits, triton shells pocked with scarlet bumps, carniaira snails with backward-curving tips that make them resemble flimsy gondolas, crowned ferola snails, atlanta snails with spiral shells, gray nudibranchs from the genus Tethys that were spotted with white and covered by fringed mantles, nudibranchs from the suborder Eolidea that looked like small slugs, sea butterflies crawling on their backs, seashells from the genus Auricula including the oval-shaped Auricula myosotis, tan wentletrap snails, common periwinkles, violet snails, cineraira snails, rock borers, ear shells, cabochon snails, pandora shells, etc.
En sus notas, cita entre los moluscos numerosos pectúnculos pectiniformes; espóndilos amontonados unos sobre otros; donácidos o coquinas triangulares; hiálidos tridentados, con parápodos amarillos y conchas transparentes; pleurobranquios anaranjados; óvulas cubiertas de puntitos verdosos; aplisias, también conocidas con el nombre de liebres de mar; dolios; áceras carnosas; umbrelas, propias del Mediterráneo; orejas de mar, cuyas conchas producen un nácar muy estimado; pectúnculos apenachados; anomias, más estimadas que las ostras por los del Languedoc; almejas, tan preciadas por los marselleses; venus verrucosas blancas y grasas; esas almejas del género mercenaria de las que tanto consumo se hace en Nueva York; pechinas operculares o volandeiras de variados colores; litodomos o dátiles hundidos en sus agujeros, cuyo fuerte sabor aprecio yo mucho; venericárdidos surcados con nervaduras salientes en la cima abombada de la concha; cintias erizadas de tubérculos escarlatas; carneiros de punta curvada, semejantes a ligeras góndolas; férolas coronadas; atlantas, de conchas espiraliformes; tetis grises con manchas blancas, recubiertas por su manto festoneado; eólidas, semejantes a pequeñas limazas cavolinias rampando sobre el dorso; aurículas, y entre ellas la aurícula miosotis de concha ovalada; escalarias rojas; litorinas, janturias, peonzas, petrícolas, lamelarias, gorros de Neptuno, pandoras, etc.