Gills in example sentence
Anyone consulting Conseil would soon learn from the gallant lad that the branch Mollusca is divided into five classes; that the first class features the Cephalopoda (whose members are sometimes naked, 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.