A- 



FIG. 208. 



FIG. 209. 

 FIG. 208. ALIMENTARY CANAL or PERCH. 



Oe, oesophagus ; M, stomach ; f, caecal process of latter ; P P, short pyloric 

 region ; Ap, pyloric caeca ; MD, small intestine ; ED, rectum ; A , anus. 



FIG. 209. ALIMENTARY CANAL AND APPENDAGES OF Protopterus annectens. 



(After W. N. Parker.) 



as, oesophagus; st, "stomach"; py.v, pyloric valve; b.ent, bursa entiana 

 (anterior portion of intestine) ; ap.v, spiral valve ; re, rectum ; cl, cloaca ; 

 cLc, cloacal caecum ; v, vent ; a.p, abdominal pore ; ood, base of oviduct ; 

 k.d, base of kidney duct; Ir, liver; g.b, gall-bladder; h.d, hepatic ducts; 

 cy.d, cystic duct; b.d, common bile duct, and b.d 1 , its aperture into the 

 intestine ; c.m.a, coeliaco-mesenteric artery ; m.a", ra.a 3 , mesenteric arteries ; 

 h.p.v, hepatic portal vein ; sp, spleen. The pancreas is not seen, as it is 

 embedded in the walls of the "stomach" and anterior part of the intestine 

 on the dorsal and right side. 



