





PLATE VI. 





- 





Fig. 1 — The animal i 



s dissected to show the intestinal canal. 



a. 



a. 



Anterior adductor 



muscle. 



v. 



Ventricle. 





m. 



Mouth. 





P- 



Pericardium. 





f. 



Foot. 





au. 



Auricle. 





g- 



Gill. 



i. 



c. 



Intestinal canal. 





t. 



Tentacles of inhalent siphon, i. e\ i, 



, c, 



Points of attachment of in- 



b. 



c. 



Branchial chamber. 







testine. 



c, 



c. 



Cloacal chamber. 





r. 



Rectum. 





a. 



Anus. 





1. 



Liver. 



P- 



a. 



Posterior adductor muscle. 



s. 



Stomach. . 



p. 



r. 



Posterior retractor 



muscle. 







