56 MR. A. H. GARROD ON HALMATURUS LuUCTUOsUS. [Feb. 2, 
the pyloric extremity, with the walls of the pyloric end smooth and 
much thickened. The cardiac ciecal extremity, like that in Dendro- 
lagus as described by Prof. Owen, consists of a single cul-de-sac, 
not a bifid one like that in Macropus giganteus. 
In the subgenus Petrogale the stomach is not bifid at its cardiac 
extremity, in which respect it resembles Dorcopsis. In other 
respects, however, it presents considerable differences; it is more 
capacious opposite the oesophageal orifice, and the cardiac portion 
is bent on the rest nearly at right angles, which is not the case in 
Macropus giganteus and Dorcopsis. 
The character of the mucous membrane also deserves attention. 
In Macropus giganteus, as is well known, the squamous epithelium 
of the cesophagus spreads over most of the stomach also, the pyloric 
extremity and one of the two cardiac cca (which is itself bifid) 
being alone lined with a columnar coating. In Petrogale this latter 
is absent, the digestive mucous membrane being confined to the 
pyloric region. Of Dendrolagus inustus Prof. Owen remarks*, 
‘the epithelium is continued from the cesophagus, for a breadth ne 
2 inches down the posterior surface of the stomach, and of 12 
inch down the anterior surface, and thence is continued, slightly 
diminished in breadth, 3 inches towards the pyloric end of the sto- 
mach, and 23 inches towards the cardiac end. The rest of the 
cavity is lined with the usual gastric vascular membrane, the surface 
of which is diversified by patches of follicular apertures along the 
upper curvature of the stomach, which patches increase in breadth 
as they approach the true digestive portion.” A very similar con- 
dition maintains in Dorcopsis luctuosa, the only difference being 
that the squamous lining covering the whole of the cardiac cul-de- 
sac is also found to spread from the cesophageal orifice along the 
lesser curvature fora short distance towards the pylorus. As in 
Dendrolagus inustus, two strong parallel longitudinal folds run from 
the cesophageal opening, in this squamous-covered mucous mem- 
brane, for some distance on the way to the pyloric compartment, 
gradually disappearing before they reach it. 
The small intestine is 97 inches in length, with numerous oblong 
ie s patches distributed throughout its whole distance, averaging 
4 inch long, by 3 inch across. The cecum and large intestine are 
ie sacculated ; the former has a length of 23 inches, and its cir- 
cumference is the same; the latter is 32 ina long, being one third 
the length of the small intestine, which is the same proportion that 
Prof. Oweny observed between the same-named viscera of Dendro- 
lagus inustus. The equally short cecum in the Hypsiprymni differs 
in having two lateral longitudinal bands which scarcely sacculate it. 
The spleen is perfectly Macropine, being narrow and elongate, 
with a well-developed third lobule. 
The liver very closely resembles that of the different species of 
Macropus. Yn comparing the livers of different animals it is my 
habit to estimate by sight, and therefore only approximately, the 
the bulk of the different lobes, and to write down the results in the 
* P. Z. 8. 1852, p. 105. t P. Z. §. 1852, p. 106. 
