554 F. H. EDGEWORTH. 



Birds — genio-hyoideus (G). 

 Chelonia — cerato-maxillaris (H). 

 Crocodilia — maxillo-hjoideus (H). 

 Lacertilia vera — cerato-hyoideus (H). 

 Rliiptoglossa — genio-ceratoideus (H). 

 Ophidia — mylo-hyoideus (H). 



Ventral longitudinal muscles — 

 Genio-hyoideus : 



Birds — atrophies. 

 Chelonia — genio-hyoideus (H). 

 Crocodilia — anterior belly of maxillo-coracoideus (H). 

 Sphenodon — cerato-mandibularis (0). 

 Lacertilia vera — cerato-mandibularis (H). 

 Ehiptoglossa — genio-hyoideus (H). 

 Ophidia— maxillo-hyoideus (H). 



Sterno-hyoideus divides : 



Birds — in Gallus into thyreo-hyoideus and sterno-thyroideus 

 (G). 

 Chelonia — coraco-hyoideiis and coraco-cerato-hyoideus (H). 

 Crocodilia — coraco-ceratoideus, episterno-ceratoideus, and posterior 



belly of maxillo-coracoideus (H). 

 Sphenodon — episterno-hyoideus and omo-hyoideus (O). 

 Lacertilia vera — episterno-hyoideus profundus, sterno-hyoideus, and 

 omo-hyoideus (H). 

 Rhiptoglossa — sterno-hyoideus and omo-liyoideus (H). 

 Ophidia— cervico-hyoideus (H). 



Genio-glossus : 



Birds — in some, e. g. Procellaria (G). 

 Chelonia— raaxilla-glossus (H). 

 Crocodilia — genio-glossus. 

 Sphenodon \ 



Lacertilia vera i pj-eggnt, but not mentioned by (0) or (H). 

 Rhiptoglossa [ 



Ophidia ) it gives off the genio-laryngeus (H). 



Hyo-glossus : 



Birds — divides into cerato-glossus, hypoglossus rectus and 

 obliquus (G). 

 Chelonia— ccrato-glossus. 

 Crocodilia— cerato-hyoideus (H). 



