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INDIANA UNIVERSITY STUDIES 



6. Loricaria gymnogaster Eigenmann and Vance sp. nov. 



Head 4.S ; depth 9.3 ; depth of head at base of occipital about half its 

 greatest width, which is 1.25 in its length. Eye 3.5 in snout; 6.5 in head, 

 1.6 in interorbital ; D. 1.7 ; A. 1.5. Scutes 18 + 12 ; width at base of last 

 anal ray 4 in its distance from the caudal. 



Lateral keels prominent; the occipital with a single short serrate 

 keel on its posterior half ; the two median plates following it, each with 

 two serrate keels. The occipital bordered by three plates behind. The 

 lateral plates of the nape each with a serrated keel. Orbit without a notch, 

 its upper margin spiuulose. Belly naked, in the adult, except for a few 

 granules on the sides and in front of the anus, and sometimes on the 

 breast; entirely naked in young. Lips fringed with papillae, the lower 

 lip broad, with fringed papillae increasing in size to mouth. Three or four 

 teeth on each side of the lower jaw, the same number in the upper 

 jaw. Dorsal spine in adult equal to its distance from the anterior mar- 

 gin of the nares, the rays rapidly decreasing in height. Dorsal spine 

 not so high in the young. Pectorals with the outer ray extending to 

 the second third of the ventral, about equal to the head in length. Outer 

 ventral ray thick, reaching about to the middle of the anal. Caudal 

 emarginate, the lower ray but little produced, about twice as long as 

 middle rays ; the upper ray very greatly produced, more than twice the 

 length of the rest of the fish. Five obscure dark cross-bands, the first 

 across the nape, the second just behind the dorsal. In the small specimens 

 the bands are more conspicuous and a narrower fifth band extends ob- 

 liquely downward and forward from the base of the second and third 

 dorsal rays. In the young the margins of the bands are frequently more 

 intense than the center and a line behind the bands is frequently much 

 lighter than the rest of the interspace. Dorsal uniformly spotted with 

 faint quadrate spots. Caudal dusky at base and with two more or less 

 distinct, dark bands, the last of which is at the margin, sometimes addi- 

 tional bands across the caudal lohes; the outer caudal raj^s barred. Anal 

 with one or two faint cross-bands, both frequently above the middle of the 

 fin. Ventral with three or four similar bands. Pectorals with more 

 numerous and less regular bands. 



Type, 182 mm. to base of caudal (upper caudal filament about 480 

 mm.). Apulo, I.U.M., No. 12691. 



Paratypes, 7 specimens. Apulo, I.U.M.. No. 12692. 



Paratypes, 41 specimens. Girardot. CM. Xo. 4839 a-j ; I.U.M., No. 

 12693 a-j. 



7. Loricaria fimbriata Eigenmann and Vance sp. nov. 



Head 4.25; depth 10; dorsal 8; anal" 6; lateral plates 20+10 or 11; 

 eye 2.7 in snout, 5.3 in head, 1 - in interorbital. Width at last anal ray 

 5 in its distance from the caudal ; width of head 1.4 in its length. Head 

 moderately depressed, stigate occipital, with a pair of serrated keels, 

 bordered by three plates. Plates of anterior part of body strigate and 

 keeled. Lips broad, anterior with short, fleshy, marginal tentacles, the 

 posterior papillose and with slender marginal fringes. A few granular 

 plates along the middle of the belly, inconspicuous marginal plates at the 



