ANATOMY OV THE LEECH. 



307 



A'.rm 



Pig. 144. 



Pig. 143.— Anatomy of the medicinal leech ; 

 opened from below, a, k, buccal sucker \ b, infra- 

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

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

 gr, g, g nerves of sense and locomotion ; ^, cesopha- 

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

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

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

 vous chain ; q. rectum ; r, r, r, segmental organs ; 

 s, pouch ; a;, sheath of z^ coupling organ ; t, right 

 epididymis ; A, A, A, spermatic cords ; B, B, By 

 testes ; D, matrix ; £*, £!, ovaries ; w^ end of ovi- 

 dact; V, sucker. 



Fiff. 144,— Digestive canal of the same ; a, b, 6, 

 ft, b, the stomach and its lateral lobes or coeca; d, <?, 

 the two large coeca which extend along each side 

 of the intestine e, e; ft rectum.— After Gervais and 

 Van Buncdeu. 



Fis. 143. 



