Ellis : The Pla i ed \i m \ roGNAi h . 399 



plates. Depth at genital opening 2.5 to 2.6; head .; 



to 3.3; 1). I. S; A. I, 6; 1*. 1,8-9; lateral plates 



20 



(Steindachner) julii Steindachner. 37. 



pp. Body brownish above the pale lateral stripe, yellowish 



to white below. Three longitudinal series of small 



■ lark spots along the side. Black dorsal spot over 



the entire length of the first three rays, the rest of 



the dorsal whitish, with several oblique series of 



small dark spots, some at the tips of the rays. Anal 



with two or three series of small spots. Fontanel 



oval, small. Eye 4 in the head, 2 in the interorbital ; 



snout 1.75 in the head. Dorsal spine slender, 



shorter than the pectoral spine, which equrls the 



distance from the tip of the snout to the posterior 



margin of the eye. Three azygous plates. Head 3; 



depth 2.5 to 2.6: D. I, 7; \. I, 6-7; V. I, 5; P. I, 9; 



23 

 lateral plates . (agassizii Steindachner). 

 21 



trilineatus Cope. 38. 

 ppp. A series of three to six dark brownish or purplish spots 

 along the side and a second series on the back; dorsal 

 dusky anteriorly, sometimes with spots on rays; 

 lower fins immaculate. Head 4; depth 3-3.5; 

 eye 2.5-3 in the snout or interorbital, 6-7 in the 

 head; suborbital narrow; barbels nearly or quite 

 reaching gill-opening. Dorsal I, 8; spine one-half 

 the length of head; fin small, rounded, its base less 

 than its distance from adipose fin, which is preceded 

 by one or two median scutes. Anal I, 6. Pectoral 

 spine not reaching base of pelvic fin. Scutes 25/22; 

 humeral shields widely separated below, each 

 separated by two scutes from base of pelvic fin. 

 Yellow, with a series of three to six dark brownish 

 or purplish spots along the side and a second series 

 on the back; dorsal dusky anterioily, sometimes 

 with spots on rays; caudal barred; lower fins 

 immaculate. 1-8 (types 35-50 mm. Salta, Ar- 

 gentina, Coll. Borelli, and Steinbach. 



micracanthus Regan. 39. 

 pppp. A series of four to five dark oblong spots, the third 

 below the ad ipose, a similar series on the back; dorsal 

 9 dusky anteriorly, usually with spots on the rays, 



anal sometimes with a spot. Head 3.75; depth 3; eye 

 4.5 in head, near middle of head; interorbital 2.5 in 

 the head. Suborbital narrow; barbel nearlyreach- 

 ing gill-opening. Di »rsal 1, 7 ; spine .60 to .66 the 



