1913.] NATURAL SCIENCES OF PHILADELPHIA 577 



similar convex fashion above and below. Snout convex over surface 

 and in profile, and its length about f its width. Eye circular, well 

 elevated, close to upper profile, and hind pupil edge about midway 

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

 rather small, a little broad, commissure slightly inclined forward. 

 Muzzle rather prominent, somewhat protruded downward, and 

 jaws equal. Premaxillaries very protractile. Maxillary narrow, 

 extends about f in snout length, and largely concealed by preorbital. 

 Lips moderate, fleshy, firm, at corners of mouth form rather thick 



Fig. 25. — Mquidens madeirce Fowler. (Type.) 



fold. Jaws with an outer series of slightly enlarged, conical, curved 

 teeth, followed by a moderate inner band of smaller villiform teeth. 

 No other teeth. Upper buccal folds present inside mouth, moderate, 

 lower not developed. Tongue thick, fleshy, rather conic end not 

 free. Mandible shallow, rami low, surface convex. Nostrils small, 

 anterior trifle larger, about last f in snout length, and posterior 

 small pore opposite front eye edge above within interorbital. Inter- 

 orbital broadly convex. Hind preopercle edge slightly undulated, 

 inclined forward, its entire extent minutely serrated. Membrane 

 along hind edge of gill-opening narrow. 



Gill-opening extends forward about midway in head. Rakers 



