PLATE 21. 
(Mem. Carnegie mus., 5, Plate 48). 
Fig. 1. Hemigrammus orthus Durbin. 
1477 C.M. 28 mm. Type. Tukeit, British Guiana. 
Fig. 2. Hemigrammus ocellifer (Steindachner). 
1455 C.M. 40 mm. Gluck Island, British Guiana. 
Fig. 3. Hemigrammus rodwayi Durbin. 
1450 C.M. 46mm. Type. Georgetown, British Guiana. 
Fig. 4. Hemigrammus erythrozonus Durbin. 
1448 C.M. 32mm. Type. Erukin, British Guiana. 
Fig. 5. Hemigrammus unilineatus (Gill). 
1446 C. M. 41 mm. Wismar, British Guiana. 
