124 Fretp Museum oF NaturAL History — Zo6éxLocy, Vor. X. 
Cichlasoma dovii (Ginther). 
Heros dovit Ginther, Proc. Zodl. Soc. Lond., 1864, 154 (Lake Nica- 
ragua);— Ginther, Fishes of Cent. Amer., 1866, 461, pl. 73, 
fig. 4 (Lake Nicaragua). 
Color variable, sides with vertical bars irregular and not well defined 
in the larger specimens; usually a dark spot on each scale on lower part 
of the body, these forming broken stripes along the rows of scales; anal 
spines 6 or 7; vertebree 15+19=34. This species grows larger than any 
other cichlid found in Costa Rica. It is the largest and most important 
food fish in the lakes of Nicaragua as well. 
Parismina (1), 130 mm.; Costa Rica River (2), 215 to 240 mm.; 
Zent, April 12 (8), 115 to 290 mm.; Zent, April 15 (11), 50 to 160 mm.; 
La Victoria (13), 45 to 250 mm.; Rio Higuer6én (11), 43 to 115 mm. 
(Alfaro). 
Cichlasoma tuba Meek. Tuba. 
Tomocichla underwoodi Régan, Ann. & Mag. Nat. Hist., 1908, 463 
(Rio Iroquois) (preoccupied). 
Cichlasoma tuba Meek, Pub. Field Mus., Zodl. Ser., x, 1912, 73 
(La Victoria). 
By the people at La Victoria this species is known as Tuba. The 
dentition of this species varies considerably. In the smaller specimens 
examined by me the anterior teeth are conical or nearly so. In most of 
the larger specimens these teeth are more or less flattened at the base, 
their tips being truncate or slightly rounded. There is also considerable 
variation in the thickness of the lips; in some specimens, usually the 
smaller, the lips are normal; in others they vary from normal to lips 
similar (though smaller) to those of Cichlasoma lobochilus Ginther. 
Two specimens (170 to 180 mm.) from La Victoria have very thick lips 
and compressed teeth, while a specimen from Guapilis (195 mm.) has 
the lips nearly normal and the teeth much less compressed. The 
teeth in general are more compressed in specimens with the thickest 
lips, and these are only in the most general way correlated with size. 
I am inclined to believe that the variation in the dentition is due to age; 
and the thickened lips are due to age and are also associated in some 
way with breeding. . 
The backward position of the ventral fins is not very marked in this 
species, especially when compared with other slender species of Cichlaso- 
ma. The species which form the types on which were based the genera 
Herichthys, Paranetroplus and Tomocichla have a variable and quite 
