PLATYTJENIODUS. 



493 



4. PLATYT^SNIODUS. 



Boulenger, Ann. & Mag. N. H. (7) xvii. 1906, p. 451. 



Jaws with very broad bands of small conical teeth, the alveolar surface of the 

 prsemaxillaries widening towards the pharynx, the band of teeth in the upper jaw 

 horseshoe-shaped, that in each ramus of the lower jaw not much longer than broad ; 



Fig. 35. 



Open mouth of Platytceniodus degeni. 



a very small part of the maxillary exposed when the mouth is closed. Scales ctenoid. 

 Dorsal fin with 15 spines, anal with 3. 



A single species. 



1. PLATYTCENIODUS DEGENI. 



(Plate XCI. fig. 1.) 



Boulenger, 1. c. 



Depth of body twice and two-thirds in the total length, length of head three times. 

 Snout with convex upper profile, its length equal to the interorbital width and once 

 and one-fifth the diameter of the eye, which is four times in the length of the head ; 

 mouth not extending quite to below the anterior border of the eye, its width half that 

 of the head ; lips thick ; four series of scales on the cheek. Gill-rakers short, 9 on 



