106 THE MYOLOGY OF THE RAVEN. 



They have been noticed by every anatomist who has 

 at any time interested himself with the morphology of the 

 group 3 while the lamented Garrod successfully pointed out 

 the fact as to how they might be used, and really were 

 valuable fa.ctors in taxonomy. In the Collected Scientific 

 Papers of this last authority we find them alluded to in 

 the following words, viz.: " In the triangular patagium 

 of the wins; of the bird the tendons of two muscles are 



O 



to be found. One is that of the tensor patagii longus, 

 which forms the supporting cord of the free margin of 

 the membrane itself. The second is that of the tensor 

 patagii b re-vis, which courses parallel with the humerus, 

 not distant from that bone, to the muscles and fasciae 

 of the forearm." Professor Garrod follows these remarks 

 by a full and clear description of the peculiarities of 

 these muscles in the vast number (200+) of birds which 

 he had especially dissected and examined in relation 

 to this particular structure. 



His highly valuable contributions are rather too long- 

 to incorporate in the present connection, but they will 

 lie found in the Proceedings of the Zoological Society 

 of London for 1877 (pp. 506-19) and in that rare 

 and imperishable work, his Collected Scientific Papers, 

 edited by the late Mr. "W. A. Forbes, another labourer 

 in the same field, whose loss to us it is hard to over- 

 estimate. 



Professor Owen's account of these fleshy slips runs 

 thus :- 



" A remarkable muscle, partly analogous in its 

 origin to the clavicular portion of the deltoid, but dif- 

 ferently inserted, is the extensor plicce alaris, and 

 forms one of the most powerful flexors of the cubit. 

 It is divided into two portions, of which the anterior 

 and shorter arises from the internal tuberosity of the 



