The exteriors of some animals in this class contain an amino-acid oxidizing molecule called achacin (“ACK-uh-sin”) that acts as an antimicrobial agent. Secretions from organisms in this class serve as the vector of lancet liver flukes prior to infecting ants. Organisms in this class can create a temporary barrier made of dried GAG-rich secretions called an epiphragm (“epi-fram”) prior to the formation of the operculum. Members of this class (-5[1])can invert their visceral mass and mantle (10[1])in a total (10[1])body-plan (10[1])inversion (-5[1])during (-5[1])early (-5[1])development (10[1])called torsion. (10[2])The blood flukes that cause schistosomiasis (-5[1])(“SHISS-toh-soh-MYE-uh-siss”) are spread by animals (-5[1])in this class. Animals in this class (10[1])can reproduce by stabbing each other with calcium (10[1])carbonate (-5[1])“love (10[1])darts.” (10[2])For 10 points, name this (-5[1])class of mollusks that are contrasted with bivalves and (-5[1])cephalopods and whose name is Latin for “stomach foot.” (10[1])■END■ (10[9]0[1])