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Show 514 PROF. ST.-GEORGE MIVART ON THE ALUROIDEA. [June 6, with the right central, and in the proportion of the left lateral to left central lobe, in the cystic notch and gall-bladder being quite close to the left margin of the right central lobe, in the proportion borne to the left lateral lobe by.the left central, and in the great size and in the close approximation (on the abdominal surface of the liver) of the left lateral and right central lobes. On the diaphragmatic aspect of the liver the caudate lobe hardly appears, though the right lateral lobe is very small compared with the right central. The last-mentioned lobe has a notch at the bottom of the umbilical fissure; and therein lies the gall-bladder. Seen on its posterior, or abdominal, aspect, the liver shows a small Spigelian lobe, which is slightly bifid at its apex. The caudate lobe is small. The left central lobe does not appear. The proportion borne by the right lateral lobe to the right central is much as in Nandinia. The right central lobe lies almost entirely to the right of the gall-bladder, only a minute portion of that lobe being to the left, of it. The liver of Proteles also belongs to the Crossarchus type of liver, in that the gall-bladder lies close to the left margin of the right central lobe-the cystic and umbilical fissures coinciding. On its diaphragmatic aspect the right lateral lobe is larger than the right central, and the former has a small notch at its margin. The proportion borne by the left lateral lobe to the left central is as in Nandinia. The small caudate lobe does not appear. On the abdominal aspect of the liver we see a small and simple Spigelian and a similar caudate lobe. The right lateral lobe is notched at its border, and bears a lobelet near its margin. No part of the right central lobe lies on the left side of the gall-bladder. The left lateral lobe has a puckered surface. In Crocuta * the gall-bladder also lies much nearer to the left than to the right margin of the right central lobe ; but the umbilical and cystic fissures do not coincide. The caudate lobe is large. The Kidney. In the iEluroids there is a single papilla. This is at least certainly the case in Felis, Genetta, and Prionodon. In Genetta tigrina the kidney is large, and more oval than in the Cat. Its long diameter is 3" 4'"; its transverse diameter is 2". The Trachea and Lungs. There are 45 cartilages to the trachea in the Cat; 40 in the Lion ; 47 in the Puma ; 70 in the Genet; 50 almost complete rings in Suricata, and rather more in the Ichneumons; and 45 in the Hvaena (Meckel, Anat. Comp. vol. ix. pp. 484-487). Cuvier (I. c. vol vii. pp. 52 & 102) remarks that in the Ichneumon the rings of the trachea extend four fifths round it, and that those of the bronchi disappear soon after they have entered the lungs. Meckel (I. c. p. 490) says that in Viverra the bronchi are large and with complete rings, and that these are very hard and complete and the 1 P. Z. S. 1879, p. 85, fig. 3. |