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Show 1881.] MR. W. A. FORBES ON THE KOALA. 187 Ihe spleen, as usual in Marsupials, is somewhat triradiate in shape, being broader and forked at one end, tapering and more pointed at the other. Its greatest length is 2\ inches. There is a lymphatic gland, the size of a pea, outside each marsupial bone, Fig. 2. • • ' - / - " Uf The same, from below. R.C. Right central lobe; L.C. left central lobe; R.L. right lateral lobe- L.L, left lateral lobe; C. caudate lobe; SP. Spigelian lobe; G.B. gallbladder; G.D, bile-duct; r.l.f. right lateral fissure; Llf. left lateral fissure; u.f umbilical fissure; c.f. cystic fissure; V. C. vena cava inferior; V.P. vena porta; V.H. hepatic vein. and a pair of similar ones, superficial, on the neck. The axillary glands are large. The heart is of the usual Marsupial type. The right auriculo-ventricular valve is membranous, and nearly complete all round the aperture, being largest on the fight side. It is attached to two, or |