ANATOMY OF THE LEECH. 



227 



FIG. 150. 



Fig. 149. Anatomy of the medicinal leech ; 

 opened from below, a, h, buccal sucker ; b, infra- 

 cesophageal irauglioa; e,c,e, ventral ganglia; d, last 

 ganglion ; ./'./,./'. commissures joining the ganglia ; 

 ( Ji fit ffi nerves of sense and locomotion ; i, oesopha- 

 gus ; #, A 1 , &, A;, t\\c. dilatations or coeca of the stom- 

 ach ; m, the last of these lobes or coeca ; p, p, intes- 

 tine lying, as well as the stomach, above the ner- 

 vous chain ; q, rectum ; ?% /, r, scgmental organs ; 

 s, pouch ; x, sheath of z, coupling organ ; t, right 

 epididymis ; A, A, A, spermatic cords; B, B, S, 

 testes ; D, matrix ; E, E, ovaries ; w, end of ovi- 

 duct; v, sucker. 



Fig. 150. Digestive canal of the same ; a, 5, ft, 

 6, b, the stomach and its lateral lobes or coeca; d } c, 

 the two large coeca which extend along each side 

 of the intestine e t e; /, rectum. After Gervais and 

 Van Beneden. 



Fia. 149. 



