## Computational Fluid Dynamics (CFD)

Models of the pharynges of

*Schizocardium*sp. and*Branchiostoma floridae*and the internal chamber of*Lagynocystis pyramidalis*(NHM E16107) were constructed from simple geometric forms. In al the reconstructions below, blue represents slow flow and red fast. Longitudinal scales are in millimetres and velocity scales in metres/second.