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Show 1873.] ANATOMY OF THE BINTURONG. 201 and g inch across at its broadest part, near its base. The two lateral aggregated collections of these glands make up the oval or nearly circular mass in front of the testes ; and the raphe of the perineum runs at the bottom of the cleft between them. The penis, in its non-erect condition, does not project more than | inch beyond them. The prostate is present, but only forms a small glandular mass round the sides and inferior portion of the urethra. It is situated 3h inches from the base of the bladder, being simple, | inch broad, and | inch long. Cowper's glands are situated 1| inch in front of it; they are oval, and each is A- inch broad and | inch long. The testes measure Iginch by T 9^ inch. There is no os penis. The glans penis is conical and pointed, | inch long, and presents round its base several small dark brown hard flattened papillae, about Y1^ inch long. The vesiculae seminales are absent. The anal glands are simple, globose, and thin-walled, about \ inch in diameter; their orifices, one on each side, are extremely small. The brain presents the feline characters so clearly pointed out by Prof. Flower* ; and, as in Felis, it differs from that of Viverra in having the posterior and not the anterior of the limbs of the internal circum sylvian gyrus of greater breadth. Brain of the Binturong. The Sylvian fissure tends to be vertical, but is directed somewhat backwards as well as upwards. It is surrounded by three gyri. The inner commences behind, near the lower border of the temporal lobe, and, after ascending as high as the top of the fissure, bends round it and descends on the frontal lobe to the supraorbital fissure, when it again doubles forwards to form the commencement of the middle gyrus. Its posterior limb is twice the breadth of the anterior, and is bisected by a vertical fissure which extends down as far as the horizontal temporal fissure. The middle gyrus is of uniform breadth throughout, and, commencing at the folding of the inner gyrus on the frontal lobe, goes round it and terminates at the lower border of the temporal lobe behind ; there is no fold in it at its posterior superior angle. The third or outer gyrus is but slightly bent in its anterior limb, which commences at the supraorbital * Proc. Zool..Soc. 1869, p. 478. |