164 THE BIOLOGY OF THE ANIMAL 



l. The vasa deferentia. — "Whatis their shape? Size? 

 In which direction do they run ? Where do they 

 open? 



In the female find in a position and of a shape 

 quite similar to the testes, 



c. The ovaries. — Compare in every respect with the 



testes. If the ovaries contain eggs, examine them 

 in different portions of each gland to see if there 

 is any difference in size. Make a longitudinal 

 cut into the ovary, wash with a gentle stream of 

 water, and then look for the ovisacs, in which 

 the eggs are contained. Examine under a lens. 

 Place some of the eggs on a slide, stain with ma- 

 genta, and examine. Draw. 

 Find also 



d. The oviducts. — Compare these with the vasa 



deferentia. 



Remove the muscles and digestive organs from 

 the specimen, also the endophragmal system 

 (a complicated set of ingrowths from the cuticle 

 of the ventral surface), and study the principal 

 portions of 



G. , The Nervous System. 



At the base of the rostrum look for 



a. The supya-cesophageal ganglia or "brain." — 

 What is their shape ? Are they connected with 

 each other ? Do they give off any branches ? If 

 so, where do these branches run? Look for 

 nerves passing from the " brain " to the eyes, an- 

 tennules, and antennae. 

 Behind the gullet find 



