ANATOMY OF THE LEECH. 



207 



to 



.f 



if 



FIG. 144. 



Fig. 143. Anatomy of the medicinal leech ; 

 opened from below, a, h, bucc.il pucker ; b, infra- 

 cesophageal iranglion; f, 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. tin- dilatations or coeca of the stom- 

 ach ; m, llie last of tliese lobes or coeca ; p, p, intes- 

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

 vous chain ; 5, rectum ; r, r, r. segmental organs ; 

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

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

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

 duct; v, sucker. 



Fig. 144. Digestive canal of the same ; a, b, b, 

 b, b, the stomach and its lateral lobes or coeca; d, C, 

 the two large coeca which extend along each side 

 of the intestine e, e; f, rectum. After Uervuis aud 

 Van IJuncden. 



Fia. H3. 



