CCELOM AND VASOULAli SYST15M IN THE LEIiOH. 495 



systems in a small portion ol" the epidermal network included in Fig. 7 between 

 two X. 



Fig. 12. — Reconstruction showing the communication between a branch of 

 the ventral sinus and the latero-abdominal vessel. 



Fig. 13. — Reconstruction on a larger scale of a small portion of the super- 

 ficial plexus included in Fig. 12 between two X. The dotted line repre- 

 sents the basal limit of the epidermis. 



Fig. 14. — Reconstruction of a portion of the ventral capillary plexus in the 

 neighbourhood of the nepiiridiopore, showing the connection (not followed 

 out in detail) between the annular vessel of dorsal origin and capillaries 

 derived from the latero-abdominal vessel ; also the communication of the 

 botryoidal channels with the intermediate plexus. 



Fig. 15. — Reconstruction showing the communication between the two 

 systems on the wall of the intestine, the position of which is represented by a 

 dotted line. 



Fig. 16. — Section showing the opening of the latero-dorsal into the right 

 lateral vessel (44:5th section of the first series). 



Fig. 17. — Section showing a botryoidal channel opening into the perine- 

 phrostomial chamber. 



Fig. 18. — Section showing the opening of a small sinus into the botryoidal 

 channel (one of those represented in Fig. 7). 



