NEMATODA 



249 



)ex.c. 



—HI. 



-oe.t. 



'h.g. 



Fig. 175- 



Fig. 176. 



Fig. 175. Dissection of an Ascarid to show position of the branched excretory 

 cells. /./. lateral lines ; ex.c. excretory cells. After Nassonow. 



Fig. 176. Mermis. Showing the blindly ending oesophagus and the isolated 

 mid gut, the cells of which are full of fat globules, oe.t. end of oesophagus ; 

 f.b. mid gut; h.g. hind gut; sti. stylet. Original. 



