390 MEMOIRS OF THE CARNEGIE MUSEUM. 



EXPLANATION OF PLATE L. 



Fig. 1. Pygidium guianense Eigenmann. Type, No. 1003, C. M., 77 mm., Arua- 

 taima Cataract. 



Fig. 2. Pygidium conradi Eigenmann. Type, No. 2212, C. M., 41 mm., Amatuk 

 Cataract. (The head is a little too short.) 



Fig. 3. Pygidium gracilior Eigenmann. Type, No. 1730, C. M., 27 mm., Erukin, 

 British Guiana. 



Fig. 4. Pygidium hasemani Eigenmann. Type, No. 5238, C. M., 15 mm., San- 

 tarem. 



Fig. 5. Pygidium iheringi Eigenmann. Type, No. 10785, I. U. M., 161 mm., 

 Santos. 



