72 THE MEDICINAL LEECH 



(c) The dermis, containing a plexus of "blood " capillaries. 



(d) The circular and oblique muscles. 



(e) The longitudinal muscles. 



(/) The dorso-ventral muscles, passing from the dermis through the circular 



muscles and between the longitudinal muscles. 

 (g) The botryoidal tissue around the crop and occupying most of the body 



cavity or coelome. 

 (h) The crop, with its lateral pouches or storing pockets. 

 (i) The lateral " blood-vessels " or sinuses on the outer side of the crop. 

 (j) The dorsal sinus above the crop. 



(k) The ventral sinus surrounding and enclosing the nerve cord. 

 (I) The peri-nephrostomial sinuses above the testis and enclosing the 



" testis-lobe " of the nephridium. 

 (m) The vas deferens between the lateral sinus and the ventral sinus. 

 (n) Portions of the nephridia. 



