ANATOMY OF THE LEECH. 
Fie. 114. 
Fig. 118.—Anatomy of the medicinal leech ; 
opened from below. a@,h, buccal sucker; 5, infra- 
cesophageal ganglion; ¢é, é, é, ventral ganglia; d, last 
ganglion; 7.,,f.commissures joining the ganglia ; 
9,9; 9, nerves of sense and locomotion; i, cesopha- 
gus; &, k, k, k, the dilatations or coeca of the stom- 
ach ; m, the last of these lobes or ceca; p,p, intes- 
tine lying, as well as the stomach, above the ner- 
vous chain; g, rectum; 7, 7, 7. segmental organs 5 
8, pouch; @, sheath of 2, coupling ba t, right 
epididymis; A, A, A, spermatic cords; B, B, B, 
testes; D, matrix; Z, Z, ovaries ; w, end of ovi- 
duct; v, sucker. 
Fig. 114. ~Digestive canal of the same ; @, }, b, 
6. 0, the stomach and its lateral lobes or ceca; d, ¢, 
the two large cceca which extend along each side 
of the intestine e, e, 7, rectum,—After Gervais and 
Van Beneden. 
Fre. 113. 
165 
