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Indiana University Studies 



3 (3.33) in interorbital ; interopercle with 12 to 13 spines, the longest .2 

 the length of the head, naked portion of snout measured in the middle 2.5 

 to 2.66 in the length of the head ; tentacles short, about equal to the length 

 of the eye or shorter, those on the middle with from 2 to 10 very short 

 branches at the tip ; 5 plates and one median scute between the dorsal and 

 the adipose. 11+1 between the anal and lower caudal ray; base of dorsal 

 equal to its distance from the middle of the adipose spine ; ventrals reach- 

 ing past middle of anal, pectorals to the middle of the ventrals ; depth of 

 caudal peduncle 26 in its distance from the caudal. 



Dorsal, caudal, ventrals and pectorals, each with four or five conspic- 

 uous, wavy bars; faint darker spots about the size of the eye in front 

 of the dorsal, ventral surface uniform. In the female, the smaller paratype, 

 the number of bands on the fins is smaller and they are less well marked; 

 the naked margin of the snout is very narrow and without tentacles. 



Chaetostomus nudirostris Llitken 



Steindachner. Flussf. Sudani II, 1881, 

 type which has D. I, 7. (Valencia.) 

 No specimens were secured. 



p. 20, pi. v. fig. 2 notes on the 



Fig. 3. Top of head of Chsetostomus pearsei E. Type. 



Chaetostomus pearsei sp. nov. 

 "Coroncho" 



15077, I. Type, 146 mm., paratypes, 3, 65 to 133 mm., Rio Castano at 



Maracay, under rocks, July 16, 1918. 



15078, I. Paratype 122 mm., Rio Tuy at El Ooncejo, August 1. 1918. 



Head about 3; depth 6.5 to 7.5; D. 1,9; A. 1,4; 24 + 1 plates between the 

 dorsal and the fulcrum of the adipose, 11 between the anal and the lower 



