178 



MEMOIES OF THE CAKNEGIE MUSEUM. 



all but two of the sixteen genera. The eight species without recorded cases of 

 regeneration are known by but few specimens. 



Name of Species. 



Caudal 

 Fin. 



Caudal 

 Append- 

 age. 



Anal 

 Kegion. 



Author- 

 ity. 



1. Gymnotinae: 



1. Electrophorus electricus (Linnaeus). 



2. Gymnotus carapo (Linnffius) 



Sternarchinae : 



1. Sternopygus macrurus (Bloch & Schneider) . 



2. Sternopygus ohlusirostris Steindachner 



3. Eigenmannia macrops (Boulenger) 



4. Eigenmannia virescens (Valenciennes) 



Eigenmannia troscheli (Kaup) 



Steatogenes elegans (Steindachner) 



Hypopomus brevirostris (Steindachner) 



Hypopomus artedi (Kaup) 



Rhamphichthys roslratus (Linnaeus) 



Gymnorhamphichthys hypostomus Ellis 



5. 

 6. 

 7. 

 S. 

 9. 

 10. 



Sternopyginae : 



1. Stemarchorhynchus oxyrhynchiis (MiiUer & Troschel) . 



2. Sternarchorhamphus millleri (Steindachner) 



3. StemarchorJuimphus macrostomjis (Giinther) 



4. Sternarchus albifrons (Linnaeus) 



5. Sternarchus brasiliensis Reinhardt 



6. Sternarchus bonaparti Castelnau 



7. Sternarchus leptorhtjnchus Ellis 



8. Sternarchus hasemani Ellis 



Sternarchella schotti (Steindachner) 



Siernarchella balcenops (Cope) 



Sternarchogilon naltereri (Steindachner) 



Porotergus gymnotus Ellis 



Porotergus gimbeli ElUs 



14. Adontosternarchus sachsi (Peters) 



15. Orthosternarchus tamandua (Boulenger) , 



9. 

 10. 

 11. 

 12. 

 13. 



Sachs 

 Spms. 



Spms. 



Spms. 



Spms. 



Steind. 



Steind. 



Spms. 



Spms. 



Spms. 



Spms. 



Spms. 



Spms. 

 Spms. 



Steind. 



Spms. 

 Spms. 

 Spms. 

 Spms. 



Spms. 



Spms. 

 Boulg. 



Gymnotinae, Electrophorus electricus (Linnseus). According to Sachs (op. cit., 

 1881, p. 11), the long anal fin and confluent caudal of the electric eel were often 

 found slightly injured and in various stages of regeneration. These injuries were 

 usually V-shaped rents in the fins. The parts restored were fin-membranes and 

 rays. The regenerations in some cases seemed fairly complete, none of the nine 

 specimens in the present collections were found to be injured, 



Gymnotus carapo Linnaeus. This species is an almost cylindrical fish, rather 

 pink with a greenish cast in life and crossed by blue-gray or greenish bands. The 

 body tapers somewhat in the caudal region and ends in a small, cylindrical caudal 

 appendage, which never exceeds the snout in length. The head is rather flat, and 

 both of the strong jaws contain one or two rows of conical teeth. The adult of this 

 species is largely predaceous. Only seven cases of regeneration were found among 

 two hundred and forty individuals of G. carapo examined. 



The collections of this species include specimens of all sizes from fortj'^-eight 

 localities. Four of the injured ones had lost only a few millimeters of caudal 



