380 MEMOIRS OF THE CARNEGIE MUSEUM. 



EXPLANATION OF PLATE XLIV. 



Fig. 1. Scleronema operculatum Eigenmann. Type, No. 7077 C. M., 79 mm., 

 Cacequy. 



Fig. 2. Hatcheria titcombi Eigenmann. Type, No. 11110 I. U. M., 164 mm., 

 Arroyo Comajo. 



Fig. 3. Pygidium eichorniarum Ribeiro. No. 7560a, C. M., 40 mm., San Antonio, 

 Rio Guapore. 



Fig. 4. Pygidium heterodontum Eigenmann. Type, No. 138.32 L U. M., 83 mm., 

 Rio Mendoza, Argentina. 



Fig. 5. Pseudostcgophihis 7iemurus (Giinther). No. 7547 C. M., 78 mm., Rio 

 Mamore. 



