1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



67 



Body compressed, contour elongately ellipsoid, deepest about 

 midway in its length, and edges convexly rounded. Caudal peduncle 

 well compressed, length about f its least depth. 



Head large, compressed, flattened sides about evenly constricted 

 above and below, and upper profile a little more evenly convex than 

 lower. Snout convex in profile and over surface, long as wide. 

 Eye small, a little elevated, rounded, and its center nearly midway 

 in head length. Mouth small, gape inclined forward, jaws even. 

 Lips thin, broad, not covering teeth. Teeth welded into sharp-edged 

 even cutting-edge. Two large upper posterior canines and larger 

 lower one on each side. Inner buccal membranes broad. Tongue 



Fig. 26. — Callyodon philippinus sp. nov. 



thick, depressed, apparently not free. Maxillary not half way in 

 snout, not nearly to front nostril. Nostrils small, lateral, incon- 

 spicuous, little separated, hind one about | an eye-diameter before 

 eye and both near level of upper eye edge. Interorbital broadly 

 convex. Opercular flap narrow. 



Gill-opening extends forward close behind hind nostril. Rakers 

 32 very short weak flexible points on outer edge of first arch, and 

 about 52 slender setae-like rakers on inner edge, which latter about 

 3| in gill-filaments. Gill-filaments 2 in snout length. Pseudo- 

 branchiae about I of gill-filaments. Isthmus narrowly constricted, 

 gill-membranes adnate. 



Scales large, cycloid, and those on middle of sides with exposed 



