1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



49 



depth medianly, profiles alike, and edges convexly rounded. Caudal 

 peduncle compressed, length about half its least depth. 



Head compressed, rather small, rather flattened sides evenly 

 converge above and below. Snout broad, convex, length | its width. 

 Eye rounded, little elevated, hind pupil edge about midway in head 

 length. Mouth small, short gape slightly oblique, and jaws nearly 

 even or with lower very slightly included. Lips rather narrow, 

 fleshy. Maxillary extends back to eye. Teeth small, simple, 

 compressed, pointed, crowded to form rather even cutting-edge, 



Fig. 19. — Pomacentrus burroughi sp. nov. 



and in single series. No teeth on mouth roof. Tongue thick, 

 pointed and free in front, smooth. Inner buccal folds broad. Man- 

 dibular rami rather well elevated inside mouth. Nostril simple 

 pore slightly behind middle in snout length. Interorbital evenly 

 convex. Preorbital width 2^ in eye, slips over upper maxillary edge, 

 and with broad backwardly directed spine below at hind edge. 

 Suborbital edge finely serrate below. Preopercle edge slopes forward 

 with 19 serrse behind, lower edge entire. Opercle with 2 blunt 

 points. 



Gill-opening forward opposite front pupil edge. Rakers 6-flO, 



