ANATOMY OF THE LEECH. 



165 



to 



FIG. 114. 



Fig. 113. Anatomy of the medicinal leech; 

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

 cesophageal ganglion; e,e,e, ventral ganglia; d, last 

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

 g, g, g, nerves of sense and locomotion ; i, oesopha- 

 gus ; k, k, k, k, the dilatations or coeca of the stom- 

 ach ; in, 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, r, r. segmental organs ; 

 s, pouch ; x, sheath of 2, coupling organ t, ri^ht 

 epididymis; A, A, A, spermatic cords; 'B, , , 

 testes ; />, matrix ; E, E, ovaries ; w, end of ovi- 

 duct; v, sucker. 



Fig. 114. Digestive canal of the same ; a, b, b, 

 b, b, the stomach and its lateral lobes or cceca; </, c, 

 the two large coeca which extend ahum i-.-ich side 

 of the intestine e, e ; f, rectum. Alter Gervais aud 

 Van Benedeii. 



FIG. 113. 



