| OCR Text |
Show 1895.] ANATOMY OF CRYPTOPROCTA FEROX. 433 of the group 2 The liver of Cryptoprocta agrees very closely with that of Herpestes, which is figured in the paper referred to. But no salient differences appear to distinguish the Viverrine from the Feline liver. § Organs of Respiration and Circulation. The lungs are divided into four lobes on the right side and three on the left. The air-tube supplying the anterior of the right-hand lobes leaves the trachea just before its bifurcation; the middle lobe is served by a branch which springs from the bronchus just after the bifurcation. The bronchus itself supplies the two lower lobes. On the left side tbe two anterior lobes are supplied by a branch which arises from the left bronchus just at the bronchial bifurcation. The aortic arch gives off au innominate vein and then the left subclavian separately. This appears to be the general arrangement in the Ailuroidea2. § The Brain. The brain after hardening in spirit measured 51 mm. in length by 35 m m . in diameter. The height is 26 m m. It is well convoluted and characteristically carnivorous. I have paid careful attention to the convolutions, which, as is well known, are important in determining the affinities of carnivorous animals. The brain of this animal has, however, already been described by Dr. Mivart in a memoir3 dealing with the carnivorous brain generally. But, as his memoir contains no figures of the brain of Cryptoprocta, 1 have thought it worth while to have the accompanying drawings (figs. 4, 5) prepared. The brain agrees with those of other Carnivora (except the majority of the Cynoidea) in having three gyri-the Sylvian, parietal, and sagittal-arranged round the Sylvian fissure in the order mentioned. As in Herpestes, Viverricula, Paradoxurus, and Gynictis (but not Genetta), the posterior limb of the Sylvian gyrus is partially divided by a vertical fissure. As Dr. Mivart correctly surmised from the sketch lent to him by Prof. Milne-Edwards, the Sylvian fissure is prolonged back to join this latter fissure. This has happened, however, in m y specimen only on the right side. In Viverricula. and Gynictis it occurs on both sides. Though the parietal and sagittal gyri communicate posteriorly, as in Paradoxurus, there are faint indications of a separation, as I have shown in the drawing (fig. 4, p. 434). In Paradoxurus there are no such indications. There is, however, a resemblance to Paradoxurus in the commencing division of the 1 " Notes on some Points in the Anatomy of the Ailuroidea," P. Z. S. 1882, p. 510. 2 See Mivart, P. Z. S. 1882, p. 515. 3 "Notes on the Cerebral Convolutions of the Carnivora," J. Linn. Soc, Zool. vol. xix. p. 1. PROC. ZOOL. Soc-1895, No. XXVIII. 28 |
