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 Rhynchea. In the example of Rhynchea 
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. 
AG 
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 
Proc. Zoot. Soc.—1905, Vou. II. No. Xi. 11 
