EXHALANT PASSAGE
Anterior to gill chamber leading to large anterior opening, with scaphognathite for driving water outward [McLaughlin, 1980].
Canal in front of gill chamber containing scaphognathite which functions for driving water outward, leads to large anterior opening [Moore and McCormick, 1969].
(Order Decapoda):
On each side of cephalothorax, narrow chamber or canal leading from branchial chamber to exterior at anterior end. Water current driven by scaphognathite [Stachowitsch, 1992].