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Show 1873.] CiECUM OF CANIS CANCRIVORUS. 749 upwards, and the appendix itself towards the observer, it is seen to spring from the junction of the small and large intestines with an abrupt turn to the left, which is followed very shortly by an equally A. Caecum of Canis famelicus. "1 B. Caecum of Canis familiaris. \ all one half natural size. C. Caecum of Canis cancrivorus. J sudden turn to the right, causing it to stand transversely to the direction of the intestine ; a third bend to the left, above the others, leads to the caecal end. This condition obtains in almost all the Canidae. In a specimen of C. famelicus I find the caecum much shorter than usual, and forming one and a quarter turn of a spiral, commencing by an upward turn to the left, and ending on the left side of the spire (fig. A ) . The only other peculiarity that is generally observed is that the third fold is less developed in some than in others. But in the specimen of C. cancrivorus above mentioned the caecum is much shorter than usual, being only 2 inches long in a nearly adult male animal, and almost straight, not showing any tendency to the folding on itself otherwise typical of the genus (fig. C ) . In other points of its anatomy no peculiarities were detected. In the tongue the circumvallate papillae were insignificant, three on each side, separated by a considerable interval. The fourth lower molar characteristic of the species (or genus Thous oi Gray) was not developed, the third being small and not above the gum. The undistended stomach presented the characteristic form found in so many of the Carnivora and figured in m y account of the viscera of the Binturong *. The spleen had a rudimentary third lobe. The small intestine was 5 feet, and the large intestine 6 inches, in length; and the latter seemed to bifurcate symmetrically at its proximal end into the caecum and the small intestine, the two latter being of equal diameter and scarcely smaller than the colon. The liver presented all the characteristics of Canis familiaris. In the generative organs, the prostate was fairlv * P. Z. S. 1873, p. 198. |
