ANODONTA 



4. View of heart with dorsal wall of pericardium removed. Ventricle surrounding the rectum ; left 

 auricle ; right auricle ; rectum traversing ventricle. 



5. View of kidneys when the auricles have been cut through laterally, the ventricle and rectum 

 posteriorly and the heart turned forwards. Reno-pericardial apertures lying at extreme anterior limit 

 of the pericardium on each side of the intestine Dark green glandular portion of the kidney. Non- 

 glandular ureter exposed by cutting through the floor of the pericardium. Aperture of kidney to 

 exterior indicated by bristle near and below reno-pericardial aperture. 



71 



