CHORDATES IN GENERAL 165 



deferentia. The female gonads are ovaries, and they produce ova 

 or eggs. They are carried from the body by oviducts. The males 

 of some classes possess for use in copulation certain accessory organs, 

 which tend to insure fertilization. 



References 



Atwood, Henry W.: Introduction to Vertebrate Zoology, St. Louis, 1940, The 

 C. V. Mosby Company. 



Walter, H. E.: Biology of the Vertebrates, New York, 1939, The Macmillan 

 Company. 



