238 
Fretp Museum or Naturat History — Zodtoey, Vor. X. 
Fins with spines. 
Body elongate, not very deep; dorsal fins 2, separate or more or 
less united; lateral line incomplete or wanting. 
Scales large, dorsal fins well separated; caudal fin forked; ventral 
fins abdominal, far apart. Mugilida, p. 332. 
Scales if present (present in all of the Panama species) moderate 
or small; dorsal fins separate or united; caudal fin rounded; 
ventral fins thoracic, close together or united to form a sucking 
disc. Gobiide, p. 349. 
Body deep, compressed; scales moderate; lateral line interrupted © 
under base of dorsal, reappearing lower down on caudal peduncle; 
dorsal fin single, composed of spines and rays. Cichlide, p. 338. 
