ANATOMY OF THE LEECH. 



307 







Fig. 144, 



Pig. 143.— Anatomy of the medicinal leech ; 

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

 «esophageal ganglion; e, e,e, ventral ganglia; rf, last 

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

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

 gus ; i', A, k. k, thi^ dilatations or coeca of the stom- 

 iich ; m, the last of these lobes or cceca ; p.,p, intes- 

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

 VUU8 chain ; g. rectum ; r, r, r, segmental organs ; 

 «, pouch ; », sheath of s, coupling organ ; /, right 

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

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

 duct; -y, sucker. 



Fig. 144.-— Bigestive canal of the same ; a, 5, 5, 

 6, 6, toe stomach and its lateral lobes or cceca; £f, c, 

 the two large cceca which extend along each side 

 of the intestine e, e; f, rectum.— After Gervuis and 

 Van Bfiicden. 



PiQ. U3. 



