(ESOPHAGUS, STOMACH, AND INTESTINE 337 



r 



A 



FiG. 246. ALIMENTARY 

 CANAL OF PERCH. 



. , anus; Ap, p}'loric cajca ; 

 ED, rectum ; M, stomach, 

 with cajcal process (t) and 

 short pyloric region (P P) ; 

 MD, small intestine ; Oe, 

 oesophagus. 



FIG. 247. 



FIG. 247. ALIMENTARY CANAL AND APPENDAGES OF Protopterus annectenx. 



(After W. N. Parker.) 



up, abdominal pore; b.d, common bile duct, and b.d 1 , its aperture into the 

 intestine; b.ent, bursa entiana (anterior portion of intestine); cl, cloaca; 

 d.c, cloacal c;vcum ; c.m.a, coeliaco-mesenteric artery; cy.d, cystic duct, 

 </.b, gall-bladder; h.d, hepatic ducts ; h.p.v, hepatic portal vein; k.i.l, base 

 of kidney duct; !r, liver; m.a\ ma 3 , mesenteric arteries; ood, base of 

 oviduct ; oes, cesopliagus ; py. v, pyloric valve ; re, rectum ; xp, spleen ; 

 sp.v, spiral valve; st , "stomach" ; v, vent. 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. 



Z 



