242 



PROCEEDINGS OF THE ACADEMY OF 



[Apr., 



Head depressed slightly. Snout long, depressed. Eye high, 

 midway in head length, without distinct eyelids. Mouth broad, 

 transverse, slightly crescentic, falls little before first third in snout 

 length. Buccal disk broad, especially lower lip, which extends 

 back opposite front edge of pupil, and its surface finely papillose. 

 Lateral barbel emanates about midway in snout length, and extends 

 back about opposite hind eye edge. Teeth moderate, most of 

 upper simple, pointed and with slender acuminate tips. Lower 

 teeth bifid, and lateral prong smaller, otherwise like upper. Nostrils 

 moderate, little closer than eyes are to one another, together, and 

 placed about first third in snout length. Interorbital slightly 

 convex. 



Fig. 11. — Cydojpium chimborazoi Fowler. (Type. J 



Gill-opening lateral, mostly above insertion of pectoral. 



Enlarged rays of fins all with small denticles or spinescent, body 

 otherwise smooth. Humeral process unarmed, smooth, extends 

 back about midway in pectoral fin. 



Dorsal inserted little nearer snout tip than caudal base, spine 

 rather flexible terminally, longest of radii, and extends back little 

 over half way to adipose fin. Latter rather large, placed mostly 

 behind anal. Anal base entirely before adipose fin, and origin 

 nearly midway between last dorsal ray base and caudal base. Caudal 

 deeply emarginate, median rays much shorter than outer, so that 

 hind edge lunate. Pectoral low, extends back slightly beyond 

 dorsal base. Ventral inserted slightly before dorsal, reaches f to 

 anal. 



Color in alcohol pale brownish, clouded with darker irregularly. 

 Fins mostly pale. Iris pale slaty. 



