BY J. DOUGLAS OGILBY. 89 



the maxillary extends to about one diameter behind the eye, its 

 length being l^\j^ in the head, and its greatest width, including 

 the process, half of a diameter more than the eye; the jaws are of 

 equal length, and the lower is provided with a free lip, which is 

 shallow in front and forms a deep flap on the sides; the dentary 

 bone reaches backwards almost as far as and along the inner side 

 of the expanded maxillary. Both jaws are armed with a narrow 

 band of small acute teeth anteriorly, behind which and separated 

 bv a considerable interspace is a single series of short stout teeth, 

 which extend backwards along the sides almost to the angle of 

 the mouth, and some of which, especially on the sides of the 

 lower jaw, are provided with a broad base and strongly hooked 

 backwards and inwards; a crescentic band of minute teeth on the 

 head of the vomer, among which are placed at regular intervals a few 

 long, slender, detached teeth, those at the outer ends being the 

 largest; palatine teeth in a narrow band, which extends as far 

 back as those of the premaxillaries; the outer series is enlarged 

 and conical, the rest minute and shai'p pointed; pterygoid bones 

 and tongue edentulous. Both nostrils are of moderate size, 

 circular, and surrounded by a low skinn}- rim; the anterior pair 

 are situated on the front edge of the nasal bone and are as large 

 as and somewhat more approximate than the posterior, which 

 open immediate!}' in front of the middle of the eye. Eye small, 

 entirely covered by a delicate membrane. Opercle with two 

 strong spines, the upper one horizontal and approximating to the 

 upper border, with acutely pointed free tip; the lower directed 

 obliquely downwards and backwards and entirely concealed 

 beneath the loose skin, which is continuous across the gill-covers. 

 Gill-rakers reduced to two or three smooth knobs near the joint 

 of the anterior arch.* 



No perceptible dorsal tubercle; the dorsal fin originates a little 

 in advance of the middle of the pectoral, and its distance from 

 the extremity of the snout is 3| in the total length; the rays are 

 slender and deeply branched, those of the third quarter a little 



* As well as cMU lie seen from an outward \iew 



