THE PERAMELES NASUTA. 
199 
likewise found three lobes on the right side, and two on 
the left, in the lungs of the Opossum. 
The cesopJiagus measured 4| inches from the root of 
the tongue to the cardiac orifice of the stomach. It was 
about three lines in diameter when moderately inflated, 
and consisted of pretty strong coats. The internal surface 
had a red and villous appearance, and was strongly marked 
with longitudinal striae of muscular fibres to near the car- 
dia, where it became much thinner, smooth internally, and 
dilated at its entrance into the stomach. The stomach was 
comparatively small, largely provided with glands, and 
with a thick muscular coat. It had a singular, round, 
ovate form, measuring scarcely S inches from right to left, 
and about 1|- inch from above downwards, when moderate- 
ly inflated. The oesophagus entered near the middle of its 
upper margin, leaving a large hemispherical shut portion 
or cul-de-sac, on the left side, the internal surface of which 
was quite smooth and villous ; while the right half of the 
stomach was entirely covered internally with rugse, run= 
ning chiefly in a longitudinal direction, and particularly 
numerous towards the pylorus. The circular fibres form- 
ing the sphincters were very distinct, both around the car- 
diac and pyloric orifices of the stomach. Its cavity con- 
tained no food, but a few hairs and some vegetable fibres, 
like fragments of straw or grass, still remained in it. Im- 
mediately beyond the sphincter of the pylorus there is a 
contracted ring around the commencement of the duode- 
num, in which small twigs from the hepatic and gastric 
arteries pass round both sides of the intestine. 
From the pyloric extremity of the stomach to the caput 
ca?cum coli, measured 29 inches ; from the caecum to the 
anus, 9 inches ; and the caecum itself was 3 inches long. 
The coats of the duodenum and jejunum were very thin 
and delicate; those of the ihum were thicker, and they 
