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Show 1891.] ANATOMY OF THE KAGU. 11 Myology. The account of the muscular anatomy, which I a m able here to offer to the Society, is very far from being complete. M y material (a single specimen which had been already partially dissected by one of m y predecesors) was not sufficient to permit of an exhaustive description of the muscles. However, in the present state of our knowledge of Avian myology, there are comparatively few muscles which have been shown to have any classificatory importance ; concerning most of these I have something to say. Syrinx of Ehinochetus, from the side. At present all that is known about the muscles of Rhinochetus is contained in the late Prof. Garrod's well-known paper upon bird classification [19], and is therefore restricted to a statement that the ambiens,femorocaudal, semitendinosus, and accessory semitendinosus muscles are present. I. M U S C L E S O F T H E F O R E L I M B . - ( 1 ) The Tensor patagii longus and the tensor patagii brevis both have a fleshy origin from the clavicle ; close to the commencement of their long tendons of insertion the two muscles are firmly attached to each other by fibrous tissue ; near to this point, as is commonly the case, a tendinous slip from the humerus joins the muscles ;.and there is also a tendinous slip arising from the great pectoral muscle. The tendon of insertion of the tensor patagii longus presents no noteworthy particulars ; the tendon of insertion of the tensor brevis is extremely complicated ; these tendons are connected with a thin aponeurotic fascia covering some of the extensor muscles of the forearm, and the two inner of the three branches by which the tendon |