568 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



The epiotic process is developed lateralh" and receives on its poste- 

 rior surface tlie upper end of the postteinporal. 



The parietals are largely covered ))y the frontals and show little 

 except their posterior face ])ehind the pterotic occipital crest. 



The inyodome is very large at its mouth, and tapers cjuickly to an 

 extremely small pore opening to the exterior posteriorly. 



LATERAL BONES OK HEAD. 



The opercle is i-ather elongate and l)ears the snbopercle on its lower 

 posterior margin. 



The interopercle occupies a peculiar position. Jt extends behind 

 the large preopercle straight between the angular and the su])opercle. 



Fig. 2. — Inner side of "face bcjnfs" <if Antigonia kubescens. 



an angular, 

 oj- articular. 

 d dentary. 

 Inn hyomamlibiilar. 

 top interopercle. 

 inpt nietapterygoid. 

 mxpt mesopterygoid. 



op opercle. 



pa palatine. 

 pop preopercle. 



pt pterygoid. 



q quadrate. 



sop subopercle. 



sy symplectic. 



and is almost entirely concealed from the outside by the large pre- 

 opercle. At its middle is a small articular fascet to which the end of 

 the epihyal is attached. 



The preopercle is very large. A ridge I'uns straight from its upper 

 to near its lower margin, turns .sharply at an angle, which is slighth" 

 more acute than a right angle, and runs straight to near the condyle 

 of the lower jaw. 



The head of the hvomandibular is undivided where it articulates 



