42 THE MYOLOGY OF THE RAVEN. 



Zungenbeuger. Meckel, p. 408. No. 3. 

 Hypoglossus rectus. Nitzsch. 



" Liegt wie der M. hypoglossus obliquus an der unteren Flache 

 der Zunge. Er entspringt nahe der Mittellinie etwas vorwarts vom 

 M. H. obliquus und inserirt sich nahe dein Vorderende des Os 

 entoglossum. 



" Am deutlichsten entwickelt bei Papageien, fehlt er sehr vielen 

 Vogeln, und ist iiberhaupt nichts weiter als die vordere Verliin- 

 gerung des M. hypoglossus obliquus. Hiermit stimmt seine 

 Innervation iiberein." 



NOTE. These are all the lingual muscles alluded to by Professor 

 Gadow in Bronn's Thier-Reichs, and a moment's comparison will 

 show the corresponding ones as I found them in Corvus, and also 

 such as are not found among Passerine birds. The following seem 

 to be the correspondences to which I allude : 



SHUFELDT. GADOW. 



Mylo-hyoideus = M. mylo-hyoideus anterior. 



Stylo-hyoideus = M. mylo-hyoideus posterior. 



Genio-hyoideus = M. genio-hyoicleus. 



Cerato-hyoideus = M. cerato-hyoideus. 



Sterno-hyoideus = M. sterno-hyoideus. 



Depressor-glossus = M. hypoglossus obliquus (?). 



Cerato-glossus M. cerato-glossus. 



What I take to be the M. hypoglossus obliquus of Gadow appears 

 to be sufficiently evident in Corvus, and further than that genus I 

 have not as yet looked into the matter. 



