150 FIELD COLUMBIAN MUSEUM' ZOOLOGY, VOL. VII. 



compressed posteriorly; width of head 1.20 in its length; mouth 

 wide, 1.46 in length of head; interorbital 3.20 in head; diameter of 

 eye 5.32; ventral disc broad, subcircular, its length 1.18 in head, its 

 width 1.24; origin of anal fin under middle of dorsal; origin of dorsal 

 slightly nearer base of caudal than base of pectoral, its distance from 

 snout 1.38 in length of body; pectoral fin broad, composed of 20 rays, 

 preopercular spine present, rather weak, concealed by skin. 



Color nearly uniform brownish, no spots or bars, a black blotch on 

 anterior rays of dorsal fin; distal half of fin lighter than basal half, 

 caudal and pectoral unicolor, brownish. 



Chonophorus transandeanus (Giinther). 

 Scales 63-18. 

 Rio Machuca (i), 200 mm. 



The following is a list of fishes collected in Beliz by Dr. Bailey of 

 Cedar Rapids, Iowa, and sent to the Museum for identification 



Family Siluridfe. 



Rhamdia godmani (Giinther). 



Head 3.8 to 4.2 ; depth 4.6 to 5.4; D. 1,6; A. loorii; snout to 

 origin of dorsal 2.8 to 2.9 in body; base of adipose fin 2.7 to 2.9 ; snout 

 2.5 to 2.6 in head; diameter of eye 6.2 to 6.5; interorbital 2:7; base 

 of dorsal fin 1.7 to 1.8; its height 1.6 to 1.7; pectoral spine 2.2 to 2.4; 

 base of anal fin 2.0 to 2.2 ; caudal peduncle 2.3 to 2.5 ; last dorsal ray 

 to origin of adipose fin 4.5 to 4.7 ; humeral process about half length 

 of pectoral fin. 



Color dark olivaceous, no lateral band; a light band across middle 

 of dorsal fin. 



Beliz (2), 172 and 186 mm. 



Family Characiuidir. 



Astyanax aeneus (Giinther). 

 Beliz (17), 75 to 125 mm. 



