6 THE MYOLOGY OF THE RAVEN. 



fibres of the dermo-tensor patagii (to be described further 

 along), or else, as I say, a few of them seem to merge 

 with the cleido-trachealis. This muscle acts as a tensor 

 of the lateral cervical integuments, and through its 



O 7 O 



connection with the dermo-tensor patagii, as an auxiliary 

 to the tensor patagii longus. 



From such information as I have at hand at the 

 present writing, I would say that the muscle I here 

 describe corresponds to the temporo-alaris of Viallane, or 

 at least to the upper portion of the temporo-alaris of that 

 writer. It has also received other names at the hands 

 of anatomists, as may be seen by consulting their works, 

 or such as deal with the myology of birds. 



4. The dermo-dor salis. I give the long muscular 

 strip that we find in the Raven, in the median line, 

 running down the neck and back, this name. It is most 

 prominent in the middle of the neck, where it is inclosed 

 in a fold of the integument. It gradually becomes lost 

 as we approach the occiput, as it in like manner spreads 

 out and disappears over the caudal region. Much fat 

 may overlie it, which must be carefully dissected away to 

 bring the muscle into view. 



By its contraction the feathers along the median line 

 of the dorsum and neck are raised, which action is 

 assisted by the preceding muscle. 



5. The platysma myoidcs. This muscle is fairly well 

 developed in the Raven, but requires careful dissection 

 to bring it into view. It arises on either side, from the 

 lower margin of the ramus of the jaw, below the ramal 

 vacuity. From these points it spreads out as a very 

 thin, fan-like sheath, closely attached to the skin, to 

 meet in a faint raphe in the median line. It will be seen 

 that the common muscular layer thus formed, materially 

 assists in supporting the lingual apparatus and the upper 



