282 



TRANSACTIONS OF THE AMERICAN PHILOSOPHICAL SOCIETY 



sorium is inclined and produced forward; in the teuthidoids, zanclids and balistids the con- 

 tinuation of this process leads to some very strange results, for the hyomandibular now 

 comes into direct contact with the circumorbital bones, which become fastened to it, while 

 at the lower end the quadrate-articular joint is finally produced to a point far in front of 



Teuthis virgata 



Fig. 159. Teuthis virgata. 



the eye. The angel-fish (ephippid) division of the chaetodontoids also shows us how the 

 lacrymal on the outside and the lateral ethmoid and mesethmoid on the inside became 

 prolonged downward and forward; again in Zanclus (Fig. 158) this condition is emphasized 

 to a hitherto unheard-of degree. The result of this forward growth of the suspensorium 



olf fossa 

 Triacantfius strigilifer ^ 



-? scale- 

 bone 



sym 



Triacanthus sp. 



Fig. 160. Triacanthus sp. 



