Plate XIX. 



Spurilla hraziliana MacFarland. 



Fig. 96. Central Nervous System from above. The buccal and 

 olfactory ganglia are not shown; the basal ends of the 

 olfactory nerves, olf. n., are seen arising from the cere- 

 bral portion of the cerebro-pleural ganglion complex, 

 c. pi. g. The nerves are indicated in Roman, I-VIII, 

 in uniformity with the figures of Trinchese, cited in the 

 text. ped. g., pedal ganglia; ped. com., pedal com- 

 missure; pi. com., pleural commissure; cer. hue. con., 

 cerebro-buccal connective ; e., eye ; at., otocyst, in front 

 and slightly beneath it the otic ganglion, x 46. 



