IX 
ALIMENTARY CANAL 
257 
VOL. VII 
Fic. 155.—A, alimentary 
canal and liver of a 
female Protopterus,from 
the left side. Part of 
the left wall of the 
stomach and intestine, 
and the peritoneal in- 
vestment of the spleen 
have been removed. a.p, 
Abdominal pore ; 0d, 
bile-duct ; b.ent, Bursa 
Entiana ; cl, cloaca; 
cl.ap, cloacal aperture ; 
cl.c, caecum cloacae ; 
¢.m.da, coeliaco -mesen- 
teric artery; cy.d, bile 
duct; k.d, kidney duct ; 
m.a, mesenteric  ar- 
teries; od, oviduct ; 
pt.c, post- caval vein 
or inferior vena cava ; 
p.v, portal vein; the 
other reference letters 
Gis} bale 15}, (From 
Newton Parker.)  B, 
viscera of an adult 
female Lepidosteus, ven- 
tral view. The oeso- 
phagus, the commence- 
ment of the intestine 
and the rectum have 
been laid open. ad, 
air-bladder ; an, anus ; 
6.d, intestinal aperture 
of the bile-duct ; 9.0, 
gall-bladder ; gl, oeso- 
phageal aperture of the 
air-bladder ; h.d, hep- 
atic duct; J, liver; oes, 
oesophagus ; py, py- 
lorus ; py.c, pyloric 
caeca; py.c’, the four 
intestinal orifices of the 
pyloric caeca; 7, rec- 
tum; s, spleen; sp.v, 
spiral valve; st, 
stomach. (From Bal- 
four and Newton 
Parker.) 
TR 
