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Show 1884.] ANATOMV OF SCOPUS UMBRETTA. 551 tendon gives off a broad ligament to the ankle, and then becomes fused with the tendon of the flexor perforatus et perforans of tbe 3rd digit. 23. The tibialis anticus is made up of two portions: the larger arises from the cnemial crest of the tibia, the smaller from the front part of the outer condyle of the humerus. The two unite to form a strong tendon, which is inserted in the usual fashion. Fig. 4. Fl.h - Fl. n Deep plantar tendons of Scopus umbretta. Fl.h, Eexor hallucis; Flp, flexor profundus digitorum 24. The extensor digitorum is a small muscle arising from the crest of the tibia and from the front part of the bone for the space of about an inch; its tendon supplies all the digits with the exception of the first. In the foregoing description of the muscles of Scopus, more attention has been paid to those which are known to vary in the different groups of birds. In his paper on certain Muscles in Birds \ Prof. Garrod distinguished the Pelargi from the Herodiones by the presence in the former of the ambiens muscle, two intestinal caeca, and a double pectoral muscle; in both groups the femoro-caudal'1, semitendinosus, and accessory semitendinosus were present. In a subsequent paper3, however, Prof. Garrod stated that the ambiens was not always present in the Storks, since he failed to find it in Xenorhynchus senegalensis and Abdimia sphenorhyncha ; it is therefore impossible to separate the two 1 Coll. Papors, p. 221. 2 Absent in a few Storks, e. g. Leptoptilus argala. Coll. Papers, p. 421. |