ASCARIS LUMBRICOIDES LINN^US 87 



5. Do the same with the cross-section through the middle of 

 the worm. 



6. Examine the slide under high power (400 diameters). 

 Make the following drawings: 



(a) Cuticle. Label outer membrane, cortex layer, layer of 

 fibrillae, homogeneous layer. 



(b) Side line. Label interstitial lamella, excretory canal. 



(c) Muscle cell. Label protoplasmic core, nucleus, contractile 

 sheath. 



(d) Intestine. 



(e) Uterus. 



(f) Oviduct. 



(g) Ovary. Label rachis and eggs. 



