132 Field Columbian Museum — Zoology, Vol. VII. 



in large individuals. The young (55 mm.) from the Nicaragua lakes 

 have a less developed lateral band than specimens of same size from 

 Tehuan tepee and San Francisco in southern Mexico. The Nicaragua 

 specimens are also darker. This species grows to a length of about 

 50 cm. and is regarded as a very good food fish. It is not very common 

 in the markets. 



Momotomba (5), 55 to 195 mm.; Granada (5), 150 to 235 mm. 

 Managua (14), 118 to 228 mm. 



