540 Proceedings of Royal Society of Edinburgh. [sess. 
EXPLANATION OF FIGURES. 
PL I. fig. 1 . Cercocebus fuliginosus. — Stomach as seen from the 
cephalic aspect. F., fundus ; O., oesophagus \p.c. , pyloric canal ; p., 
pylorus ; g.o., line of attachment of the great omentum ; g.h.o. 
line of attachment of the gastro-hepatic omentum. All above the 
xxx xx line (in the fig.) is not in contact with the liver. 
PI. I. fig. 2. Cercocebus fuliginosus . — To show the viscera ex- 
posed when the abdomen is opened and the great omentum 
removed. L., liver ; A, B, C, and D, parts of the colon referred 
to by these letters in the text; II., ileum; Cce., csecum; l.g., 
lymphatic gland. The mesocolon — to the right of the figure — 
covers the small intestine. 
PI. II. fig. 3. Cercocebus fuliginosus. — The abdominal viscera 
exposed by removal of parts A and B of the colon and the greater 
part of the mesocolon. A.C., ascending colon ; S.I. small in- 
testine. Other letters as in PI. I. fig. 2. 
PI. II. fig. 4 Cercocebus fuliginosus. — Parts 0 and D of the 
colon and their connections as seen from the ventral aspect. The 
dotted line shows the course of the curves not visible from this 
point of view, f , a narrow part of the colon referred to in the text. 
PI. III. fig. 5. Cercocebus fuliginosus. — Spleen, s.g., superficies 
gastrica; s.r., superficies renalis ; s.b., superficies basalis ; a. b. a., an- 
terior (ventral) basal angle ; i.b.a., internal (mesial) basal angle ; h., 
hilum ; pan., area for pancreas. 
PI. III. fig. 6. Lagothrix liumboldti. — The abdominal viscera as 
exposed on removal of the walls of the abdomen. L., liver ; f.l., 
falciform ligament; T.C., transverse colon; Sp., spleen; S.I., small 
intestine; A.C., ascending colon; a, frsenal furrow (position of 
ileo-csecal orifice) ; b, position of mucous fold in csecum referred 
to in the text; D.C., descending colon; Cse., csecum; s.f., sigmoid 
flexure ; u.b., urinary bladder. 
PI. III. fig. 7. Lagothrix humboldti . — Spleen. The same letter- 
ing is used as in PI. III. fig. 5, with the addition of s.p., superficies 
phrenica. 
Fig. 1. Cercocebus fuliginosus. — Cephalic view of the liver. 
Fig. 2. Cercocebus fuliginosus. — Visceral surface of the liver. 
Letters common to figs. 1 and 2 : — R.C., right central lobe ; L.C., 
left central lobe; L.L., left lateral lobe; R.L., right lateral lobe; 
om. lob., omental lobule ; caud. lob., caudate lobule ; u.f, umbilical 
fissure; r.l.f ., right lateral fissure; l.l.f, left lateral fissure; v.c., 
vena cava; fal. lig., falciform ligament ; pan., area for pancreas; rt. 
ad., area for right adrenal; rt. kid., area for right kidney; duod., 
area for duodenum; pyl., position of the pylorus; s., area for the 
stomach. 
The gall-bladder and the portal fissure are shown in solid black. 
The dotted area has no peritoneal covering. 
The surface of the right lateral lobe, not accounted for in fig. 2, 
is related to the ascending colon. The visceral surface of the 
