FLAT WORMS 



35 



Fig. 8. Nervous System of rhabdocoelida. A and B. Brain with one and 

 two pairs of eyes of alloeocoelan flat worms, Bohming;. C. Nervous 

 system of an acoelan, Polychoerus, Lohner. D to H. Brains of Rhab- 

 flocoela. D. Oii'n^tniua. E. Prorhynchiis, after Vejdovsky. F. GaffiUa, 

 Bohming. G. Rhabdocoela nervous system, Bohming. H. Stennntoma, 

 Ott. I. An acoelan showing nervous system after Bohming. 



