1915.] 



NATURAL SCIENCES OF PHILADELPHIA. 



239 



Head elongate, depressed, broadly convex above and more or 

 less flattened below. Snout depressed, somewhat acuminate, length 

 about equals greatest width, and upper profile slightly concave in 

 front. Eye moderate, with eye socket well notched behind, general 

 form ellipsoid, and center falls about last third in head length. 

 Mouth anterior or slightly before middle in snout length, transverse, 

 and jaws firm. Teeth apparently few, minute, close-set and uni- 

 serial. Buccal disk (damaged) apparently more or less rounded? 

 Tongue broad, depressed, scarcely free. Nostrils together within 

 an aperture about half length of orbital aperture, to which close 

 before in lateral profile, and hind edge of aperture slopes up gradually. 



Fig. 10. — Loricariichthys hauxwelli Fowler. (Type.) 



Internasal space slightly less than half of interorbital. Cheeks very 

 slightly concave, and interorbital similar. Opercle large, porous. 

 Supraoccipital process broad basally, though . forms narrow point 

 about f basal width. 



Gill-openings lateral, extend forward about opposite eye center. 

 Gill-rakers 4-f 8 ? short firm points, much less than filaments and 

 latter little less than eye. Branchiostegals with outer broad. 



Scales, or scutes, all more or less minutely spinescent. Predorsal 

 region with 3 scutes to occipital. Three series of scutes transversely 

 across middle of belly, with inner series broad. Anteriorly, or on 

 breast, scutes smaller or more numerous. Two scutes between 

 ventrals. Anterior 2 predorsal scales each with strong keel on each 



