| OCR Text |
Show 1905.] ANATOMY OF LIMICOLINE BIRDS. 161 of the humeral head. This has already been noted by Fiirbringer and Beddard (1 and 2 ), and the latter author states that he found a similar reduction in Rhynchcea. In the example of Rhynchcea that I dissected, however, I found a very different condition, the well-marked occurrence of a peculiar Limicoline deviation which occurs in a more or less modified form in all the other birds which form the subject of this paper. The Limicoline peculiarity of the biceps brachialis is well marked in Chionis (see text-fig. 27). The main mass of the Text-fig. 27. AC Biceps of Chionis alba. AC. Coracoid head. BI.P. Biceps patagialis. BI. 1. Chief portion of biceps. BI. 2. Accessory biceps. R. Radial insertion. U. Ulnar insertions. muscle arises by a tendon from the acrocoracoid (AC.) and by a large and fleshy head from the humerus (BI. 1) ; this tapers towards the lower end of the humerus and then divides into a P roc. Z o o l . S oc.-1905, V o l . II. No. XI. 11 |
