6 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



Ethmoid almost directly above vomer, similarly indented, but by a 

 shallower notch. 



Frontals not extending very far back, exposing underlying supra- 

 occipital nearly to its anterior end, which reaches about middle of 

 cranium. 



Pterygoid reduced in size. Suspensorium otherwise typical. 



Bones of opercular apparatus all large. 



Opercular rolled over toward cranium at upper edge. 



Cavity in dentary for reception of articular not large. 



Ooronoid bone well developed. 



A-Hgular present. 



Dentary becoming slender anteriorly. 



Post-temporal very firmly attached. Its upper fork attached broadly 

 to a rough surface at base of epiotic process. Lower fork attached 

 to process of opisthotic by very deeply dentate suture, forming an 

 integral rod of nearly uniform size from opisthotic to distal end of 

 posttemporal. Suture at about middle of rod. At posterior end of 

 posttemj)oral at base of forks the long pterotic process is strongly 

 fastened, thus forming a tripod attachment for shoulder girdle, mak- 

 ing post-temporal wholly immovable. 



Supraclavicle so small that it admits upper end of clavicle to nearly 

 reach to a level with lower end of posttemjjoral. 



Clavicle with a downward-hooked process on inner anterior edge. 



Hypercoracoid placed high on clavicle. Its foramen, though wholly 

 contained within hypercoracoid, is so near its forward edge that it 

 deeply notches edge of overlying clavicle. 



Hyj)ocoracoid falciform. Its inner upper corner but slightly touch- 

 ing clavicle, thence curving quickly away and only weakly attaching 

 to it at its long lower end. 



Actinosts short; three joined to hypercoracoid, one to hypocoracoid. 



Pectoral fin placed high on shoulder girdle, two or three of its upper 

 rays working directly on hypercoracoid. 



Postclavicle of two pieces. The superior typically lamellate, the 

 inferior rodlike, large, and strongly curved inward. 



From the under side of the pubic bones near their union each sends 

 a long slender bone forward, which tapers to a hairlike process. 



First interneural of spinous dorsal enlarged and divided into two 

 spines, though supporting only one dorsal spine. 



Interneurals of soft dorsal slender and subequal. 



First interhaimal of anal enlarged very slightly, though not elon- 

 gated, and supporting two anal spines. Interhi3emals graduated from 

 behind forward. 



Front of anal not free under abdomen. 



In front of spinous dorsal are two peculiar supernumerary interneurals 

 composed of two long, slender, contiguous splints of bone placed hori- 

 zontally. At the middle of each a fork is sent down between the 

 second and third and fourth and fifth neural spines respectively. 



