PLATE 18. 
Fig. 1. Hemigrammus nanus (Liitken). 
44958 U.S.N.M. Cotype. 47mm. Lagoa Santa, Brazil. 
Fig. 2. Hemigrammus levis Durbin. 
20738 M.C. Z. 47mm. Type. Amazon. 
Fig. 3. Hemigrammus micropterus Meek. 
10802 I. U. M. 86mm. Cotype. Los Castillas, Venezuela. 
Fig. 4. Hemigrammus hyanuary Durbin. 
20955 M. C. Z. 37.5 mm. (To middle caudal rays). Cotype. Hyanuary, Brazil. 
