MUSCLES OF CERATODUS 



367 



and the hyosuspensorial ligament, and immediately behind the 

 Quadrate. The ligament passes from the upper end of the 

 Ceratohyal to the Quadrate. The E. hyomandibularis vii. 

 passes outwards dorso-anterior to the oto-quadrate cartilage, 



Text-fig. 39. 



basal proc.af 

 QaacLra£e 



Rhyomanxi vii 



Ceratohyale. 

 (cut across) 



lyasaspenj 

 'nterhyaLe 



base of aud. capsule 



Base of model chondrocranium of a 27 mm. embryo. The Quadrate 

 and Ceratohyal have been cut across. The R. hyomandibularis vii. 

 is represented only on the right side. 



dorsal to its lateral end, then between the Interhyal and the 

 Quadrate, and downwards external to the hyosuspensorial 

 ligament. 



The oto-quadrate cartilage is the structure called ' Hyo- 

 mandibula ' by K. Flirbringer and Krawetz and probably the 

 inner of the two ' Epihyalia ' depicted by Greil. 



