485 DR. J. MURIE ON THE DERMAL AND VISCERAL STRUCTURES 
such a vast gular pouch as obtains in the Pelican. The short-tongued Balwniceps' 
shows its affinity to Cancroma also in this particular. 
In Rhinochetus and Eurypyga the palate is awl-shaped, mesially cleft (1-4 inch in the 
former), and provided with two separate transverse serrate folds. Of these the anterior 
is concave, and the posterior convex, in their backward direction. In the Kagu the 
folds are 0°7 inch apart, and occupy fully the hinder third of the palate. 
The roof of the mouth in the Boatbill, as in the great Shoebill, corresponds to the 
enormously distended preemaxille. The entire length to the fauces is some 4 inches, 
and the breadth 1+ inch, in the adult bird. It is slightly arched in both diameters; so 
that outwardly and inwardly the beak is decidedly boat-shaped. The postnares open 
by a mesial elliptical slit, 0-7 inch long. 
In Pl. LVII. fig. 13, I have given a reduced sketch of the viscera of the Kagu in 
place as seen when the abdomen was opened. The following notes were made at the 
time. A thick layer of fat, similar to that coating the ventral surface of the body, lay 
superficially, and covered the gizzard, intestines, and almost the entire rectum and 
neighbouring parts. On removing the fat, a portion of the bilobed liver was exposed 
posterior to the sternum. The left lobe (Z./) reached further back than the right 
(£.r); and from underneath the former the gizzard (Gz) jutted into the abdomen. 
The right anterior moiety of the abdomen is chiefly occupied by the intestines, pancreas, 
and portion of the cecum. The rectal portion of the gut (2) is free for an inch before 
it forms the cloaca (Cl), and, as mentioned, is covered and laterally padded by the 
peritoneal fat. 
The cesophagus proper in the Sun-bittern and Kagu is thin-walled and of moderate, 
nearly uniform diameter throughout. There is no crop as in the Gallinacew. In the 
Boatbill the cesophageal tube (fig. 20, @) is distinguished from the preceding by great 
width in its upper half; thence it tapers downwards very considerably. Above the 
parietes are thinnish ; but below, where narrower, they become more muscular. 
Figures 14 & 15, Pl. LVIL., are designed to show the digestive cavity of Rhinochetus 
jubatus—in its outward aspect, and opened to display internal structure. The proventri- 
culus (Pr) exteriorly has but moderate enlargement, and there exists only a slightly 
sensible constriction between it and the gizzard (Gz). Both divisions of the partly 
compound stomach have soft muscular walls; and the rounded but purse-shaped 
gizzard has anteriorly a small “central” glistening tendon (¢) to the left, posteriorly 
another more to the right or close to the pylorus. The proventricular glands are 
numerous, and appear as minute punctate elevations on its mucous coat, which is 
thrown into longitudinal folds. ‘The interior of the gizzard is chiefly plicated length- 
wise; but an intervening strip, dividing and defining it from the proventricular area, 
markedly distinguishes itself by numerous cross furrows, which give quite a chequered 
appearance to the part. These smaller transverse grooves extend round the narrow, 
1 Parker, op, cit, p. 317. 
