516 



PROCEEDINGS OF THE ACADEMY OF 



[Sept., 



anal spine 2f; fifth branched anal ray If; least depth of caudal 

 peduncle 2}; caudal 1 T V; pectoral 1 T V; ventral \\. 



Body oblong, well compressed, deep, rather robust, back well 

 elevated with upper profile bulging somewhat anteriorly, lower 

 profile rather evenly and shallowly convex and greatest depth about 

 opposite depressed ventral spine tip. Body edges all rounded con- 

 vexly. Caudal peduncle well compressed, length about f in least 

 depth. 



Head large, compressed, upper profile steeply inclined, slightly 

 concave before eye, and lower profile little inclined. Sides of head 

 slightly convex, becoming a little more approximated above than 



Fig. 7. — Mquidens azurifer Fowler. Type. 



below. Snout large, profile slightly convex, surface well convex, 

 and basal width at front of eyes equals its length. Eye circular, 

 rather well elevated, close to front profile, and a little anterior in 

 head length. Eyelid free, narrow. Pupil circular. Mouth wide, 

 small, commissure slightly inclined. Muzzle rather prominent, 

 somewhat protruding, and jaws equal. Premaxillary quite pro- 

 tractile. Maxillary narrow, extends about half way in snout length, 

 and concealed by preorbital. Lips thick, fleshy, tough, not free, 

 at corners of mouth somewhat conspicuous. An outer series of 

 enlarged conic teeth in each jaw, followed by a broad inner band 



