PLATE XIII 
Fia. 1. Olocinclus macrospilus Eigenmann and Allen, sp. nov., paratype, 
15606, 30 mm., R. Morona. 
Fia. 2. Pimelodella montana Allen, sp. nov., type. 17830, 93 mm., Rio 
Huallaga, Hudnuco. 
Fias. 3-5. Pygidium atochae Allen, sp. nov., types. 17819, 64, 85, and 93 
mm., R. de Atocha, Bolivia. 
Fries. 6-7. Astroblepus praeliorum Allen, sp. nov., types, 17829, 38 and 
58 mm., Hudnuco. 
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