230 MORPHOLOGY OF INVERTEBRATE TYPES 



ureter, kidney, pericardium, auricle, ventricle, pulmonary vein 

 with ramifications. The nephridium is the large spongy body, 

 the ureter runs from its rear edge in a curve to the left (animal's 

 right). The heart is in contact with it. 



6. Extract from under the ramifications of the pulmonary 

 vein the shell and make a drawing of it. 



7. Remove the radula from the pharynx, place it on a slide in 

 water, examine under microscope (100 diameters) and make a 

 drawing of it. 



8. Examine under high power (400 diameters) the prepared 

 section through the hermaphroditic gland and make a drawing 

 showing young eggs and spermatozoa or such stages of the male 

 reproductive cells as may be found. 



