. Aves. Appendix: On some points in the anatomy of Bradypterus cinnamomeus. Birds. \V. P. PYCRAFT—AVES : APPENDIX. 457 shows a decided adaptation to the bird's mode of life—clinging to reeds; and this because the proximal portion of the toes, and especially of the hallux, is markedly expanded and closely granulated, so as to afford a hold of smooth-stemmed rushes. There is no approach to this in the foot of Bradypterus. III. Myology. The condition of the deltoideus major and gastrocnemius muscles ouly need be described for the purposes of this paper. Wing-Muscles. The deltoideus major in Brady
. Aves. Appendix: On some points in the anatomy of Bradypterus cinnamomeus. Birds. \V. P. PYCRAFT—AVES : APPENDIX. 457 shows a decided adaptation to the bird's mode of life—clinging to reeds; and this because the proximal portion of the toes, and especially of the hallux, is markedly expanded and closely granulated, so as to afford a hold of smooth-stemmed rushes. There is no approach to this in the foot of Bradypterus. III. Myology. The condition of the deltoideus major and gastrocnemius muscles ouly need be described for the purposes of this paper. Wing-Muscles. The deltoideus major in Bradypterus is in a condition rather more primitive than that of the Whitethroat and Chiffchaff, but is slightly more specialized than in Acrocephalus ; while in all these genera this muscle has preserved more of its primitive character than is usual among the Passeres. Text-fig. 16. a 99?. 6.*. d. m,. b. 1!|FL Wiug-niuscles of Bradypterus, slightly diagrammatic. The longus division (text-fig. 16, ) is divisible into two layers. The outer rises from the inner aspect of the expanded free end of the furcula ; while the inner and immediately underlying moiety, which is nearly as large as the outer, arises from the acrocoracoid. These two divisions, obviously derived from a two-headed condition of a single muscle, fuse midway down the arm to be inserted in the form of a thick fleshy stump on to the ectepicondylar process of the humerus, but distinct from the delt. maj. brevis. vol. xix.—fart iv. No. 60.—March, 1910. 3 f. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ogilvie-Grant, W. R. (William Robert), 1863-1924; Pycraft, W. P. On some points in the anatomy of Bradypterus cinnamomeus. London, Printed for the Society
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