Mouth a 



Prostomium 



First somite 

 --Second somite 



Subesophageal ganglion 



Subneural blood vessel %X 



Internal end of nephridium- -1^-.^ 



Anterior seminal receptacle 



Posterior seminal receptacle- - 



Basal portion 

 of seminal vesicle - 

 External end of nephridium—^ 



Ventral blood vessel 



Ovary r^fd 



Oviduct 



Body wall 



Ventral nerve chain -It 



— Supraesophageal ganglion 

 — Pharynx 

 - - Wall of pharynx 



Retractor muscle of pharynx 

 - Beginning of esophagus 



Seventh somite 



First heart 



Lateral blood vessel 



--Septum 



Anterior seminal 

 vesicle 



- Calciferous gland 



-Fifth heart 



~rfr Parietal blood vessel 

 J- fr~ Dorsal blood vessel 



"Posterior seminal 

 vesicle 



- End of esophagus 



- - Crop 



- Gizzard 



sr * Intestine 



Fig. 128. Dissection of an earthworm, Lumbricus terrestris. (x4) 

 Lateral blood vessels and connections. (After Johnston) 



