Ingding current 



Outgoing 

 current 



tit— ii- j^— 



Inha.la.nt chamber ^ 



Base of gill 

 filament 



Buccal 

 lip 



Inner edge of 

 lophopnore 



Fig. 5.8. Feeding in Brachiopod Crania 

 (a) View of feeding animal. (6) Diagram of currents in the mantle cavity (longitudinal 

 section through animal). Larger arrows show the course of the main currents; dotted 

 arrows below represent the course of larger particles falling out of the main stream, 

 (c) Section through lophophore to show ciliary currents: 1, direction of beat of current- 

 producing cilia on gill filament; 2, direction of beat of frontal cilia. (From Orton, 1914.) 



