Pomona College, Claremont, California 61 
Fig. 16. Cerebral ganglion, section. The commissure shows. X70. Sunset clam. 
Fig. 17. Longitudinal section of a pedal ganglion. ‘X70. Sunset clam. 
Figs. 18, 19, 20, 21. Various sections of visceral ganglion. The dorsal side is 
up. X70. Sunset clam. 
