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ENDEAVOUK' SCIENTIFIC RESULTS. 



ing to or not so far as the middle of the eye, its posterior 

 border slightly emarginate ; supplemental bone distinct, lying 

 along the upper margin of the maxillary and turned in towards 

 its inner side. Preorbital entire. Preoperculum with two 

 borders, the inner entire, the outer serrated at and near the 

 angle which is a little produced ; short ridges extend from 

 each tooth across the bone. Operculum with two spines, the 

 lower a little longer than the upper. Suprascapular rounded, 

 with a dentate margin, and a ridge on its lower portion 

 extending forwards. Nostrils situated on the hinder half of 

 the snout, almost equal in size, the anterior with a skinnv 

 margin. 



Teeth in \ illiform bands on the jaws, vomer and palatines, 

 with scarcely any larger ones in the young. In the adult the 

 premaxillaries bear crowded villiform teeth along their whole 

 length, and have a pair of large curved fangs near their 

 symphyses which may be double. Between these bones there 

 is a median excavation which is toothless. Mandible with a 

 narrow band of villiform teeth which is widest anteriorly. A 

 strong pair of canines, corresponding to but smaller than those 

 of the upper jaw, in front ; on either side large curved teeth 

 occur among the others which increase in size as they extend 

 backw ards, and terminate about half way along the length of 

 the jaw. These larger teeth are variable in size and number 

 in different specimens. Vomer with two diverging bands of 

 minute teeth, among which are some larger ones. Palatines 

 each with a long, narrow band of minute villiform teeth. Gill- 

 rakers of first arch long and slender, the hinder ones more 

 than half as long as the eye and each with the inner margin 

 minutelv denticulated; 21-22 on the lower limb. 



KIG. 13. 



Scales very deciduous, those of the upper part of the head, 

 preorbital and mandible rounded, concentrically striated and 

 cycloid. They also appear to ha\ e been present on the cheeks 



