518 PROCEEDINGS OF THE ACADEMY OF [.Sept., 



Color in alcohol largely olivaceous-brown on back, becoming 

 paler below and on sides. On lower surface color pale gray-brown, 

 much paler on lower surface of head, and on breast about gill-opening. 

 Along each series of scales on back at upper and lower junctions of 

 scales longitudinal or horizontal dark lines. These latter at first 

 dusky or deep slaty-brown, but as they follow below upper 1. 1. 

 become pale blue, so that over greater or lower half of trunk they 

 have this tint. Along middle of side opposite hind end of depressed 

 pectoral, just below and partly on upper 1. 1. a large slaty-black 

 blotch, but it also perforated by regular slaty longitudinal streaks, 

 giving an underlaid appearance. This dark slaty-black blotch 

 formed only as broad dark edges to scales involved, and even oliva- 

 ceous streaks also showing in the interstices. Along costal region, 

 and that above spinous anal, pale blue streaks become connected 

 at bases of scales and thus expose olivaceous ground-color as rounded 

 spots, one on each scale. These pale blue streaks extend completely 

 along caudal peduncle side to base of caudal. Head olivaceous- 

 brown above, like back, becoming paler below. Lips brownish, 

 cheek and opercular region with pale gray spot. Two deep blue 

 narrow lines extend down from lower edge of eye to lower preorbital 

 edge, and an upper parallel and similar extends towards snout tip 

 till just below front nostril. Iris slaty. Inside gill-opening pale. 

 Spinous dorsal and rayed dorsal dull olive-dusky, with indistinctly 

 defined oblique streaks more or less longitudinally, also somewhat 

 reticulated in places, with grayish. Upper edge of rayed dorsal 

 narrowly, and cutaneous tips to dorsal spines dull ochraceous. 

 Caudal dull olivaceous-brown, clouded indistinctly with dusky as 

 several irregular darker transverse streaks. Edge of caudal behind 

 narrowly dull ochraceous. Anal dull olivaceous, with grayish tinge 

 basally and dull dusky distally, edge becoming narrowly slaty. 

 Bases of rayed vertical fins, together with bases of last dorsal and 

 anal spines with dull or pale bluish tinge. A short vertical dusky 

 or slaty bar at caudal base. Pectoral and ventral pale brownish- 

 gray, both pale basally, former more brownish distally and latter 

 becoming dusky distally along first and second branched rays. 



Length 5| inches. 



Type, No. 32. Collection, S. N. Rhoads. Affluent of the Chimbo 

 River, near Bucay, Province of Guayas, Ecuador. July, 1911. 



Also Nos. 33 to 35, paratypes, same data. Head 2| to 2 T 9 ¥ ; depth 

 2f to 2f ; D. usually XIV spines, sometimes XIII, rays usually 11, 

 sometimes 10; A. spines III, rays usually 9, sometimes 8; scales in 



