722 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Myodome wide aiitorioily :ind little lonoor thuii wide. Opening to 

 exterior posteriorly . 



Hyoniandihular sending a very long process downward to symplee- 

 tic, which latter l)one is almost hidden l)y the quadrate. The typical 

 foramen between the upper edge of the metapterygoid and h^-^oraandi- 

 bular and guarded by a wing from the former bone is here almost 

 absent. Otherwise the shape, size, and arrangement of the elements 

 which make up the suspensorium is typical. 



Opercular apparatus showing no (l(^})arture from the usual percoid 

 arrangement. 



Nasal a very large thin wide bone, which attaching to frontal 

 behind, to epiotic along inner edge, and its outer edge curving down- 

 ward I'oofs over a large chamber in which the olfactoiy organs lie. 



Supratemporal a wndely forked thin tunnel of bone. Its iiuun* 

 l)ranch arching over the skull to frontal, its outer continuous with 

 sensory canal along edge of pterotic. 



Preorbital large, extending over maxillaries. Suborbitals with a 

 well developed inner shelf. 



Shoulder girdle showing no peculiarities. Post-temporal widely 

 forked; attached to skull l)y ligaments; hypercoracoid with a fora- 

 men through its center; actinosts four, graduated; postclavicle with 

 both elements very wide and thin. 



Four branchiostegals on the ceratohyal; three on the epihyal. 



Interhyal short and with a rounded head which curves in between 

 hyoniandibular and s3Muplectic. 



liasibranchials two in numl:)er. Hypobrauchial of fourth arch lack- , 

 ing as usual. Inferior pharyngeals long and slender, separate, and f 

 covered with small, curved, cordiform teeth. Four superior pharyn- 

 geals present on each side. The first or suspensory pharyngeal is 

 styliform and toothless as usual; second, bearing an irregular row or 

 recurved cordiform teeth; third and fourth large, united at bases, 

 though not ankylosed, and bearing large, roundish, and separated 

 patches of similar teeth. 



Angular present, small. 



Maxillaries without supplementary bones, processes from upper 

 part of premaxillaries very short. 



Dental surface of jsiws slightly roughened anteriorly, but no teeth 

 present. 



Pelvic girdle typical; firmly attached between clavicles. 



Vertebra? 10 + 13 + hypural = !i4. Parapoj)hyses not developed on 

 four anterior A'ertebrte; a rudimentary one on lifth, thence grow- 

 ing longer posteriorly. Inferior and superior zygapophj'ses Avell 

 developed. 



Fpipleurals present, none on centric of vertebr.t?. 



