606 PROCEEDINGS OF THE NA TIONAL MVSEVM. vol. xxvii. 



of the mandible, which is bridged once at the articular and twice at 

 the tip of the dentar3^ There is no open space between the upper 

 edge of the articular and the upper limb of the dentarv. The pre- 

 maxillary is long and slender, and has a moderate process. There is a 

 very large supplemental bone on the upper edge of the maxillar}^ 

 extending down over its outer surface nearly to its lower edge. The 

 preorbital is not differentiated from the suborbitals. The suborbital 

 ring is wide and cavernous. On the second suborbital is a slender 

 triangular suborbital shelf, hooked backward. The other face bones 

 are as in the Percoids. 



HYOID. 



The ceratohj^al has a very large foramen through its middle. There 

 are six branchiostegal rays on the ceratohyal and two on the epihj-al. 

 The hypohyals are wide and flat; the lower one is much the larger. 

 The urohyal has a pair of small long-itudinal basal wings. No glosso- 

 hyal is present. 



PHARYXGEALS. 



. The lower pharyngeals are slender and separate. There are two 

 superior toothed phar^^ngeals on each side; that of the second arch is 

 small and slender: that of the third and fourth is a large elongate 

 patch, rounded behind and reaching to a point in front. 



SHOULDER GIRDLE. 



The h3'pocoracoid arches widely away from the clavicle, leaving a 

 wide space between. Its lower limb is very slender. The hypercora- 

 coid meets the hypocoracoid in a long straight suture. Its foramen is 

 moderate and near its center. Three of the actinosts are on the hyper- 

 coracoid and one on the hypocoracoid. The first ray of the pectoral 

 works directh' on the h3"percoracoid, as usual. The postclavicle is a 

 single piece, formed as when in two pieces, the upper part widened 

 into a thin plate, the lower a slender ray. A rather long superclaviele 

 is present. The posttemporal is widely forked. Its upper fork is 

 developed backward in a thin plate, which bears a large ridge ending 

 in a stout spine behind. 



PELVIC GIRDLE. 



The opposite halves of the pelvic girdle are attached only for a short 

 distance at their points and posteriorly at the ends of short projecting 

 processes, leaving a space between them at their middle. Anteriorly 

 the upper and lower edges of each arch inward inclosing a chamber 

 between. 



VERTEBRAL COLUMX AND APPENDAGES OF A'ERTICAL FINS. 



Abdominal vertebrre 11 + caudal 14 + hypural = 2(). The atlas is 

 shallowly concave and the pit is near its upper edge. The sixth ver- 

 tebra bears the first parapophj^ses. The opposing parapophj^ses are 

 connected, and a haemal canal is formed. Posteriori}^ the}' are 



