sometimes covered with a shell), which consists of two families, the Dibranchiata and the Tetrabranchiata, which are distinguished by their number of gills; that the family Dibranchiata includes three genera, the argonaut, the squid, and the cuttlefish, and that the family Tetrabranchiata contains only one genus, the nautilus. After this catalog, if some recalcitrant listener confuses the argonaut, which is acetabuliferous (in other words,
sometimes covered with a shell), which consists of two families, the Dibranchiata and the Tetrabranchiata, which are distinguished by their number of gills; that the family Dibranchiata includes three genera, the argonaut, the squid, and the cuttlefish, and that the family Tetrabranchiata contains only one genus, the nautilus. After this catalog, if some recalcitrant listener confuses the argonaut, which is acetabuliferous (in other words,
