MOKPHOLOGY OF CRANIAL MUSCLES IN SOME VEKTEBIJATES. 273 



inscriptions in the cerato-hyoideus of Ceratodus, whilst 

 there is only one doubtful one in the coraco-niandibnlaris;^ 

 in Protopteius there are two in the coraco-hyoideus, none in 



Text-fig. 75. 



f'Uir,<xK0L A 



n-icu-xcL.rLo'. cxn. 



75. 



Text-fig. 7t). 



X . tn-H. 



Text-figs. 75-77.— Rahljit. embryo 3 mm. Text-fig. 75 is through 

 the j)remandibular Anlage, Text-fig. 76 through the mandibular 

 segment, Text-fig. 77 through the hyoid segment. 



the coraco-mandibularis; in Polypterus ? species there are 

 two in the coraco-hyoidens, none in the coraco-mandibularis. 



> It was not apparent in stage 63 (vide Text-fig. 45). 



