114 



THE MYOLOGY OF THE HAVEN. 



Some of the most complicated and interesting con- 

 ditions assumed by these muscles are to be seen among 

 such groups of sea-fowl as the Tubinares, and Forbes 

 presented us with drawings and descriptions of many 

 of these in his contributions to the Proceedings of the 

 Zoological Society of London. 



Now in the Raven we find a still different con- 



FIG 35 sex. Same view and corresponding parts of the same wing of a passerine 

 bird, Purple Martin, Progne subis (by the present writer), tp. I., tensor 

 patagii longus ; tp. b., tensor patagii brevia ; dt. p., dermo-tensor 

 patagii ; c.m.r.l., extensor metacarpi radialis longus; t., triceps; b., 

 biceps; S. H., secondary remiges. (Nearly x 2.) 



dition of affairs from some of those alluded to above, 

 in the arrangement of these two little muscles and 



o 



their tendons, so far as their origins and insertions 

 are concerned, which I will proceed now to describe. 

 G7. The tensor patagii longus (Figs. 8, 26, 32, and 



