1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



29 



midway in head length. Mouth large, well inclined, mandible 

 slightly protruding in front. Maxillary well inclined, straight, 

 reaches opposite last fourth in pupil, and terminal expansion about 

 2| in eye, its hind edge slightly emarginate. Upper maxillary edge 

 slips below preorbital except very short part of hind edge. Teeth 

 minute, in narrow bands- in jaws and apparently absent from mouth 

 roof. Lips narrow, little fleshy. Tongue free, smooth, depressed, 

 rather narrowly triangular. Inner buccal folds narrow. Front 

 nostril small pore about first third in snout, and hind nostril short 

 slit very close to front eye edge. Interorbital nearly level. Sub- 



Fig. 12. — Archamia zosterophora (Bleeker). 



orbital width about half of pupil. Preopercle ridge entire, with 

 broad short spine at angle, and hind edge finely denticulate. Opercle 

 without spine. 



Gill-opening forward opposite front eye edge. Rakers 6 + 14, 

 lanceolate, twice length of filaments or 2 in eye. Pseudobranchise 

 long as gill-filaments. Isthmus narrowly compressed, slightly 

 attenuated forwards, with trenchant edge, especially anteriorly. 



Scales caducous, large, narrowly imbricated, in longitudinal series, 

 minutely ctenoid. Scales in 2 rows on cheek, and scales on opercles 

 moderate. Axillary ventral scale moderate, broad, pointed, about 

 f length of spine. Caudal base scaly, also anal base. Lateral line 

 complete, concurrent with dorsal profile. Tubes large, trifid, well 

 exposed. Bones of head rather cavernous. Suprascapula edge jagged. 



