io8 



ANNELIDA OR ANNULATA 



Prostomium 



Cerebral ganglia ('brain) 



—F'/lorynx 

 -Pharyngeal muscles 



—Seqmen t 

 — Septum 



—A Nephr.idium (enlarged) 



Serninal vesicle I 



-Aortic arch (dorsal heart) 



-Seminal receptacles 



Seminal vesicle Z. 



Calciferous gland 



— E:sophQ<^us 



Seminal vesicle 3 



Crop 



Giz:zard 



-Dorso-infesfinal blood vessels 

 ■Dorsal blood vessel 



Stomach- infest in e 

 ■Lateral diverticulum 



Fig. 46. Internal anatomy of the earthworm. (Drawn by W. J. Moore and Norris 



Jones.) 



