74 DEEP SEA FISHES. 



long as the head, apparently with a shallow notch ; pectorals narrow, more 

 than half the length of the head ; ventrals inserted below the pectoral 

 bases, narrow, pointed, half as long as the pectoral fins. 



Light brown with dots or puncticnlations of darker over head and body ; 

 gill covers lighter; fins black. 



URANOSCOPID^. 

 Kathetostoma averruncus. 



Kathetostoma averruncus Jord. and Bull., 1889, P. U. S. Mus., XIL, 1G3. 



Br. r. 6; D. 14-15 (rarely 13); A. 13-14; V. 5 (6); P. 19; Vert. 28. 



Rather short and stout, depressed, broad, rounded on the sides, deeper 

 anteriorly, compressed toward the caudal ; body cavity le.ss than half 

 the total length. Head large, less than one third of the total length, 

 as wide and about two thirds as deep as long, crown and lower surface 

 flat, sides convex, rough on the opercular regions and the crown ; a ridge 

 across the top behind the interorbital space. Snout broad, short, blunt, 

 one and one half times the length of the orbit; chin prominent, nearly 

 vertical. Mouth large, width more than half of the length of the head, 

 vertical ; maxillary broadened and rounded at the lower end, as wide 

 as the orbit. Teeth small, unequal, in bands on jaws and vomer, larger 

 teeth distributed in the inner series on the jaws, a few teeth on the front 

 ends of the palatines. Eyes small, less than one fifth of the length of the 

 head, two thirds of the interorbital width, prominent, superolateral. The 

 sunken naked area on the interorbital space above the processes of the pre- 

 maxillarics equal in length to the orbit, or to the strong sharp humeral 

 spine. An irregular serrated bony ridge on each side between the humernl 

 spine and the back of the skull ; three short sharp spines below the opercles, 

 the anterior two antrorse, the posterior one directed downward ; a promi- 

 nent angle below the articular ; a short antrorse spine below the lower jaw 

 near the angle of the mouth; two strong antrorse spines in front of tlie 

 pelvis with a prominent and sharp angle between them. Gill openings 

 wide, extending forward above the prepelvic spine ; gill lamellte elongate ; 

 pseudobranchiaj present. Nine pyloric appendages. Skin naked. 



Fins rounded on the margins, fringed ; dorsal origin one length of the 



