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Indiana University Studies 
Plate VII. 
Figure 1. Ancistrus megalostomus Pearson. Cotype, female. No. 17007, 
84 mm. Hu'achi. 
Figure 2. Ancistrus megalostomus Pearson (ventral view of the same 
cotype). 
Figure 3. Clupeacharax anchoveoides Pearson. Type. No. 17356, 58 
mm. Cachuela Esperanza. 
