144 



THE ANIMALS AND MAN 



cerebral ganglion 



/pharynx 



retractor and protractor 

 muscles of the pharynx^ 



cesopkageal pouches- 

 seminal receptacles ~ = t~~~-.~~- f'"--"C 



crop ---- -Ir- - ----- 



nephridium- -- - -** 



* 



gizzard \- 



> dorsal blood 



. _,- 



- .*-. 



FIG. 59. Dissection of the earthworm, Lumbricus sp. 



