182 MEMOIRS OF THE CARNEGIE MUSEUM. 



The general data for this subfamily are given in the table here given: 



Species of Sternopyginse. 



1. Slernopygus macrurus 



2. Slernopygus obtusirostris 



3. Eigenmannia macrops 



4. Eigenmannia virescens 



5. Eigenmannia troscheli 



6. Steatogenes elegans 



7. Hypopomus brevirostris 



8. Hypopomus artedi 



9. Rhamphichthys rostratus 



10. Gymnorhamphichthys hypostomus 



Specimens 

 Examined. 



214 



None 



56 



482 



3 



19 



56 



90 



8 



11 



Specimens 

 Injured. 



20 



7 



72 

 

 2 

 4 

 7 

 2 

 1 



Per Cent. 



10 



12 

 15 





 11 



8 



8 

 25 



9 



Number of 

 Localities. 



27 



3 



63 



1 



3 



19 



16 



4 



7 



Sternarchinse. — The presence of a small caudal fin is the main point of 

 difference between the Sternarchince and the other three subfamilies. The fishes 

 of this group are quite compressed. In the cephalic and pectoral regions the body 

 is more or less suddenly tapered into a peduncle which bears the caudal fin. All 

 the species, with the exception of Adontosternarchus sachsi (Peters), have teeth. 

 Few specimens of this subfamily, in comparison with the Sterno-pyginoe , were ex- 

 amined, yet the general occurrence of regeneration throughout the group is evident 

 from the following table. The several species will be considered separately. 



The single individuals of Sternarchorhynchus oxyrhynchus (Miiller and Troschel), 

 and Porotergus gymnotus Ellis, and the five of Adontosternarchus sachsi (Peters) 

 noted in the above table as regenerating were each repairing small injuries to the 

 anal fin, rays and fin-membrane having been lost. None of these regenerations 

 were completed. 



Two specimens of Sternarchorhamphus mulleri (Steindachner), from Para, 

 Brazil, each about four hundred and thirty millimeters long, had lost the entire 

 caudal peduncle and caudal fin, the line of injury running across the body through 

 the end of the anal fin. Comparison with an uninjured specimen of the same 



