118 PROCEEDINGS OF THE NATIONAL MUSEUM. vouxxii. 



Suborbital ring of the usual number of five bones with a sensory 

 canal through them. No suborbital shelf.^ 



Opercle without ridges or spines on outer surface. On inner sur- 

 face a sharp horizontal ridge runs posteriorly from its condyle with 

 hyomandibular. 



Subopercle extending around lower corner of opercle, upward and 

 backward, forming lower part of posterior opercular angle. 



Intero])ercle very broadly attached to subopercle at its upper posterior 

 side. 



Preopercle with ridge and sensory canal as usual. 



Lower limb of hyomandibular rather long and rod-like. 



Palato-pterygoid process very long and stout. A single row of small 

 teeth along lower edge extending anteriorly upon a process beyond 

 main part of palatine somewhat similar to the usual process from upjier 

 edge of that bone. Suspensorium otherwise typical. 



Lower jaw heavy and long. The articular half as wide as long. 

 Teeth in a single row upon dentary, three or four canines present 

 posteriorly. 



Angular present, rather small. 



Maxillary with long supplemental bone along posterior edge. 



Premaxillary rather slender, much widened at middle into a wide 

 process which extends behind maxillary; its lower end very slender. 

 A single row of elongate pointed or small canine teeth along its edge, 

 largest medially, growing gradually smaller toward each end. Inside 

 of this row a villiform band, widest medially. At upper end of each 

 maxillary are two large canines anchylosed immovably, the posterior 

 pair much hooked back. 



Clavicle and hypercoracoid typical, or as in the Percoids. 



Hypocoracoid as usual broadly joined at upper end to clavicle and 

 hypercoracoid, thence arching away and touching lower end of clavicle 

 again with a rather slender i^rocess. Besides this, from its middle, run- 

 ning through the usual interspace between it and clavicle, is another 

 process flat and thin, but strengthened through its middle, reaching to 

 and joined to clavicle. 



Actiuosts four, rather short. 



Pectoral not nearer upjDcr end of clavicle than is usual in the Percoids, 

 its upper ray working directly upon hypercoracoid, 



Postclavicle in two parts, the inferior very long. 



Supraclavicle of moderate length. 



Post-temporal widely forked; its articulation with skull typical. 



Inferior hypohyal scarcely visible on outer surface of hyoid arch, 

 being covered by superior hypohyal, which forms the greater part of 

 front of arch. Hypohyals of about equal size on inner surface of arch. 



Ceratohyals, ephyals, and interhyals typical. 



' Suborbital shelf: a small sbelf of bone extending inward from the suborbital 

 ring and conforming to the rotundity of the eyeball. Possessed by many of the 

 higher bony iishes. 



