XII 



PHYLUM CHORDATA 



465 



other Craniates. There is a pair of stout, pillar-like 

 coracoids (cor.) articulating with deep facets on the anterior 

 border of the sternum and directed upwards, forwards, and 



s.a7L an 



FIG. 263. Columfoa liyia. Skull of young specimen. A, dorsal ; B, ventral ; C, 

 left side. al. s. alisphenoid ; an. angular ; ar. articular : b. o. bas.-occipital ; 

 d. dentary ; e. o. ex-occipital ; eu. aperture of Eustachian tube ; f. in. foramen 

 magnum ; fr. frontal ; i. o. s. inter-orbital septum ; ju. jugal ; Ic. lacrymal ; Ib. s. 

 lambdoidal suture ; m. eth. mesethmoid ; mx. maxilla ; MX. p. maxillo-palatine 

 process ; no,, no.' . no.", nasal ; o. c. occipital condyle ; or.fr. orbital plate of 

 frontal ; pa. parietal ; pa. s. parasphenoid (rostrum) ; //. palatine ; /. mx. pre- 

 maxilla ; pt. pterygoid ; qn. quadrate ; j. an. supra-angular ; j. o. supra-occipital ; 

 sq. squamosal ; ty. tympanic cavity; II. XII, foramina for cerebral nerves. 

 (From Parker's Zootorny.) 



outwards. The dorsal end of each is produced into an 

 acrocoracoid process (acr. cor.\ and below this, to the 

 Man. Zool, II H 



