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Show 1895.] ANATOMY OF CRYPTOPROCTA FEROX. 435 side of the brain, however, this fissure is only just indicated, the second of the two referred to being much the most prominent. In Gynictis the fissure in question is present and looks very like a Sylvian fissure ; so also in Viverricula. N o doubt this is some reason for placing the three genera near to each other. The brain of Herpestespulverulentus also offers some support to the veiw that the fissure b is the Sylvian fissure ; for in this species (and in other species, according to Mivart) the anterior limb of the Sylvian fissure is divided as in the Cats. There is therefore no antecedent improbability in this being the case with Cryptoprocta. § Muscles of the Limbs. In studying the muscular anatomy of Cryptoprocta, I have used for comparison Genetia pardina, besides tbe work by Dr. Mivart upon the Cat and his memoir upon the Ailuroidea. Where the Cryptoprocta diverges in the characters of its muscular system from Felis it approaches, or is identical with, the Viverridce, as will be gathered from the following notes upon the principal muscles of the limbs. Of the muscles of the fore limb I only noticed that two were different from those of Genetta pardina. In the latter the latissimus dorsi is peculiar, in that it gives off a thin branch from near where its origin encroaches upon that of pectoralis major, which is inserted on to the head of the humerus close to the origin of the biceps. Just before the origin of the dorso-epitrochlear a wide slip is given off to pectoralis major. This latter seems to correspond to the blending " with adjacent fibres of the fourth part of the pectoralis " described by Dr. Mivart in the Cat. These additional slips are not present in Cryptoprocta, which, like the Civets, has but one dorso-epitrochlear. The other difference concerns the extensor minimi digiti. I found that this muscle in the Cryptoprocta supplied digits iii.,iv.,and v., the slip to v. being for a long way up a separate muscle. In Genetta pardina it only supplied iv. and v. But the distribution of the tendons of this muscle is evidently variable; for while Dr. Mivart found that in the specimen of Genetta tigrina dissected by himself the muscle gave off tendons to all three digits, he quotes Cuvier to the effect that in " the Genet" only iv. and v. receive tendons. The biceps has but one head, as is the rule with these Carnivora. The teres major is inserted distinctly in common with the latissimus. The triceps appeared to m e to be rather four-headed, as in Viverra civetta, than five-headed, as in the Genet. The flexor sublimis gives off a tendon to the flexor profundus. It supplies the three middle digits only. The flexor profundus has four rather than five bellies; five if the connection with the flexor sublimis be counted. The extensor secundi internodii pollicis supplies digits i. and ii. 28* |