- 50 - ASCARIS. 



95. Viscera. Open the worm by a longitudinal dorsal incision and make drawings 

 to show : oesophagus ; intestine ; anus ; lateral excretory canals ; and, in male, testis, 

 vas deferens, vesicula seminalis, ductus ejaculatorius, copulatory spicules with sacs ; 

 in female, ovaries, oviducts, uteri, vagina, vulva. 



