694. ANNA LOWREY 
The cross section of Steatogenys elegans which was taken from 
the myotome region of the body, showed no modifications of the 
muscle units. 
This study was made in the Biological Laboratory of the Univer- 
sity of Colorado during the year 1912-1913. The writer is in- 
debted to Dr. Max M. Ellis for assistance and suggestions. 
SUMMARY 
1. The submental filaments of Steatogenys elegans are not 
adipose tissue. 
2. These filaments possess all the characters of electric organs. 
3. The minute anatomy of the filaments agrees with that of the 
electroplaxes from known electric tissue. 
4. No electric tissue was found in the myotome region of the 
several species of gymnotids examined. 
BIBLIOGRAPHY 
DaHuGREN, U. 1906 A new type of electric organ in an American teleost fish, 
Astrocopus, Science, N.S., vol. 26, p. 469. 
DaHLGREN, U., AND Kepner, W. A. 1908 Principles of animal histology, pp. 
105-121. . 
EIGENMANN, C. H. AnD Warp 1905 Gymnotidae, Proceedings of the Washing- 
ton Academy of Sciences, p. 469. 
EIrGENMANN, C. H. 1912 Fresh water fishes of British Guiana, Memoirs of the 
Carnegie Museum, vol. 5, p. 422 et seq. 
Exuis The gymnotid eels of tropical America, Memoirs of the Carnegie Museum, 
in press. 
WIEDERSHEIM, R. 1907 Comparative anatomy of vertebrates, pp. 190-192. 
