330 PROCEEDINGS OF THE ACADEMY OF [June, 



snout 2f in head from tip of upper jaw; eye 3f ; maxillary 4f; inter- 

 orbital space 2^ ; upper caudal lobe nearly 3 in head and trunk. Pre- 

 dorsal region rounded at first and posteriorly with a median keel ex- 

 tending to dorsal fin. Postdorsal region rounded, also preventral 

 region. Postventral region with a median obscure keel. Head broad, 

 depressed in front, rounded below and sides somewhat compressed. 

 Snout when viewed above broad and triangular with rounded tip. 

 Width of mouth about | of orbit. Maxillary about half way in snout. 

 lips fleshy. Teeth 8 in each jaw, anterior largest, and 2 median 

 mandibulars especially conspicuous. Tongue rather far back, narrow, 

 and not free. Interorbital space broadly convex. Gill-opening ex- 

 tending forward about first third in head. Rakers 10 + 14?, short, 

 lanceolate, and longest about half of longest filaments which are f of 

 orbit. Vent close in front of anal. Color in alcohol faded brownish, 

 a little darker on back and upper surface. About 14 indistinct bars 

 of deeper brownish than body-color across back, and each one 

 also narrower than pale interspace. In some cases they become 

 faded altogether on side, and frequently indistinct traces occur below. 

 Three blotches of deep brownish, larger than eye, along middle of side. 

 First blotch midway in length of trunk, and second midway between it 

 and third, which is on base of caudal. Dorsal, caudal and pectoral 

 pale, and anal and ventral dusky or deep brown. Iris brown. Teeth 

 warm brownish marginally. Length 4|- inches. Identified with L. 

 megalepis Gunther, but that species is said to have the body with large 

 blackish spots arranged in 2 or 3 series. 



Leporinus holostictus Cope. Fig. 20. 



Cope, Proc. Amer. Philos. Soc. Phila., XVII, 1877-78 (Mayll7, 1878), p. 

 690. Nos. 21,467 (type) and 21,468, A. N. S. P., cotj^jes. Peru\-ian 

 Amazon. Prof. J. Orton. Coll. of 1877. 



Width of head 2^ in its length; interorbital space 2^. Predorsal, 

 postdorsal and preventral regions rounded. Postventral region with 

 an obsolete median keel, and another on each side. Snout broad and 

 triangular seen from above. Lips fleshy. Teeth 8 in each jaw, 

 anterior ones largest, and 2 median mandibulars conspicuous. Tongue 

 rather far back, narrow and not free. Interorbital space broadly 

 convex. Gill-opening extending forward about last foiu-th in length 

 of head. Rakers 5 + 11?, short, lanceolate, and longest about f of 

 longest filaments, which are f of orbit. Scales non-striate. Color in 

 alcohol brownish, and lower sm-face paler or whitish. Body with 10 

 broad transverse bands as wide as interspaces. First includes or 

 extends over snout, second over interorbital space, third on occiput, 



