THE MUSCLES OF THE UPPER EXTREMITY. 



113 



writer found it to exist in the Baven and other Corvidce. 

 In this connection the reader should refer back to 

 the account of the dermo-tensor patagii in the present 

 work (No. 6). 



We would naturally expect this to be the case, as 

 Icterus and the Eaven are members of nearly related 

 families. 



FIG. 35 quin, View, from the outer side, of the muscles of the patagium of 

 the left wing of a passerine bird. Trotipial (Icterus mdgaris). (After 

 Garrod.) 



Among some other passerine birds, however, the 

 tendons of the two muscles just mentioned do not 

 blend with each other in the manner we have described, 

 but remain quite distinct as far as the carpus. This 

 is the case in our Purple Martin (Progne subis), as I 

 have shown in Fig. 35 sex. 



