Pomona College, Claremont, California 89 



the fibers were rather few. Fibrils also were evident, but could not 

 be traced far. Cell groups were most marked in the posterior and 

 lateral regions and fibers from these and to these could be followed 

 as individuals for long distances. Posterior cells were especially 

 numerous connected with the eyes and other parts. The \entral 

 ganglia present no unusual structures in section. In two of the upper 

 ganglia studied there seem to be in each at least two masses of cross 

 fibers or communications. 



IMPORTANT PAPERS 



Cussaiis, Margaret 1904 



Gammarus. L. M. B. C. Mem. XII. 



Koehler, R. 1887 



Recherches sur la structure du cerveux du Gammarus pulex. 

 Im. M. Anat. Phys., T. IV. 



Packard, .i. S. 1884 



On the structure of the brain of the sessile-eyed Crustacea. Nat. 

 Ac. Sc, vol. III. 



( Contrihutirjn from the ZonUjgicnl Laboratory of Pomona College) 



