_ 39 — 



If the student has been trained in making histologic prepa- 

 rations, the structure of the testis may be studied at this 

 point. 



Reproductive Organs of the Female. — Note the shape of an 

 ovary, the connection of it with the respiratory system, the 

 position of the oviduct (which is the vessel extending caudad 

 from the ovary), and the attachment of tn*e ligament of the 

 viscera. 



Make drawings showing these things. 



Each oviduct extends caudad from the caudal end of the 

 ovary through masses of fat to the seventh abdominal seg- 

 ment, where, at a point opposite the last ganglion of the 

 nervous system, it passes under the ventral muscles, and 

 terminates in a disc-like enlargement, on the body wall. 



Make a dissection showing this. 



Note. — In the adult the two oviducts extend caudad to near the 

 caudal end of the body where they empty into a short uterus. 



Take one ovary and make longitudinal sections parallel 

 with the broader sides of the organ and make a drawing of 

 one of these sections, showing the ovarian tubes and the ova. 



Take the other ovary and make longitudinal sections at 

 right angles to the broader sides of the organ and make a 

 drawing of one of these sections. 



The Masticatory Organs of the Proventriculus. — 

 Remove the alimentary canal, and carefully open the proven- 

 triculus by a longitudinal slit. Cover a piece of cork with 

 white paper, spread out the opened proventriculus upon the 

 paper ental side uppermost, and fasten it in place with rib- 

 bon-pins. Fasten the cork bearing the preparation to the 

 beeswax in a dissecting dish, and cover the preparation with 

 water. Study it with a lens and with a compound micro- 

 scope, using a low power. Write a description of the masti- 

 catory organs, and make drawings illustrating them. 



The Respiratory System. — Make a diagram showing 



