NEMATODA 



219 



;ex.c. 



-oe.t. 



I"h.g. 



Fig. 168. Fig. 169. 



Fig. 168. Dissection of an Ascarid to show position of the branched excretory 

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

 Fig. 169. 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. 



