102 



ANIMAL BIOLOGY 



Mouth 



Cerebral ganglion: brain 

 Subesophageal ganglion 



Body wall of fifth segment 



Ventral blood vessel 



Subneural blood vessel 



Internal opening 

 of a nephridium 



End of nephridium 

 opening to exterior 



Seminal receptacles 



Basal part of 

 seminal vesicles 



Ventral nerve cord 



Cavity of pharynx 

 Wall of pharynx 



Retractor muscle of pharynx 

 Beginning of esophagus 



Seventh segment 

 First aortic loop 



Septum 



Lateral blood vessel 



Calciferous gland 



Fifth aortic loop 

 Parietal blood vessel 



Dorsal blood vessel 

 Posterior seminal vesicle 



Posterior end of esophagus 



Crop 



Gizzard 



Beginning of intestine 



Fig. 60. — Earthworm. Diagram of a dissection, lateral view. (Modified, 



after Linville and Kelly.) 



