THE ANATOMY OF THE THYROID GLAND 



169 



Fig. 1. Dissection of the thyroid gland of Mustelus canis. In A the skm has 

 been reflected to show the superficial "constrictor pharyngis' muscle. In B 

 the "constrictor pharyngis" has been removed and the coraco-mandibulans 

 exposed. In C the coraco-mandibularis has been divided, exposmg the thyroid 

 gland lying upon the coraco-hyoideus. (See page 209 for explanation of abbre- 

 viations used in all figures.) 



