(FIG. :. . EXPI-ANATION OF FIGIRES 

 The figure abo\-e is chrough the snout and ganglion of Enoplus. The central 

 figure is a drawing of a cross-section of the ventral nerve band. The loivest figure is 

 from a longitudinal section of the ventral nerve band with the muscular layer above 

 and the body-wall below. 



The dor^al side i> up in all the fieures and all are enlarged 275 times. 



