. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. l'ii cum <if the ''' The jpjunnm, in the Thylacine, has a dia- meter of two inches and a half. of the way towards the blind extremity. When we reflect that the Sloth, which has the same diet and corresponding habits with the Koala, has a singularly complicated sto- mach, but no coecum, the vicarious office of this lower blind production of the digestive tube as a subsidiary stomach is still more strikingly exemplified. What then, it may be asked, is the condition of the ccecum in the Marsupials with enormous s
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. l'ii cum <if the ''' The jpjunnm, in the Thylacine, has a dia- meter of two inches and a half. of the way towards the blind extremity. When we reflect that the Sloth, which has the same diet and corresponding habits with the Koala, has a singularly complicated sto- mach, but no coecum, the vicarious office of this lower blind production of the digestive tube as a subsidiary stomach is still more strikingly exemplified. What then, it may be asked, is the condition of the ccecum in the Marsupials with enormous sacculated sto- machs ? It is in these species comparatively short and simple. In the Potoroos which scratch up the soil in search of farinaceous roots, it is much shorter than in the great Kangaroos which browze on grass. There is a slight tendency to sacculation at the com- mencement of the ccecum in the latter Mar- supials, by the development of two longitudinal bands (jig. 127). In the Wombat the ccecum is Fig. 127. extremely short, but wide; it is remarkable for being provided with a vermiform appendage. In this animal, however, the colon is relatively longer, larger, and it is puckered up into sacculi by two broad longitudinal bands. in the specimen dissected by me, one of these sacculi was so much longer than the rest as to almost merit special notice as a second ccecum. The most interesting peculiarity which the Zoophagous Marsupials exhibit in the disposition of their simple intestinal canal, consists in ^^ its being suspended from the very Caecum of the commencement of the duodenum Kangaroo. on a simple and continuous me- sentery, like the intestine of Fig. 128. a carnivorous reptile. The duodenum makes the ordi- nary fold on the right side, but it is not tied to the spine at its termination ; the com- mencement of the jejunum may, however, be distin- guished by a slight twist of the mesentery, and a fold of peritoneum is continued from the lowest curve of the loop of
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