D. V 



Cit 



DerEjikhm 



V-Nv.Cd Cael.Epthm. 



FlG. 71- Polygordius neapolitanus. 



A, transverse section of a male specimen to show the position of the 

 immature gonads (spy) and the precise form and arrangement of the 

 various layers represented diagrammatically in Fig. 68, c. 



The body-wall consists of cuticle (C//), deric epithelium (Der. Epthni], 

 muscle-plates (M. Pl\ and parietal layer of ccelomic epithelium (Ca~l. 

 -Epthm). The ventral nerve cord ( V. Nv. Cd) is shown to be continu- 

 ous with the deric epithelium. 



The enteric canal consists of ciliated enteric epithelium (Ent. Epthm) 

 covered by the visceral layer of ccolomic epithelium (CceL Epthm) : 

 connecting it with the body-wall are the dorsal and ventral mesenteries 

 formed of a double layer of ccelomic epithelium, and containing respec- 

 tively the dorsal (D. V) and ventral (V. V) blood-vessels. 



Passing obliquely across the coelome are the oblique muscles (0. M) 



