Dec. 28, 1916. Fishes of Panama — Meek and Hildebrand. 265 



was again visited and thoroughly fished, but no more specimens were 

 secured. 



This fish differs from H. magdalencB Eigenmann in the more an- 

 terior position of the dorsal, the less deeply concave margin of the 

 caudal fin, the fewer azygous plates in front of adipose spine, the 

 shorter coracoids, and in coloration. 



CalUchthys (Hoplosternum) thoracatus Steindachner (non C. & V.) 

 from the Cauca appears to be very closely related to this species, if not 

 identical with it. 



The present species is the most northern representative of the genus. 



Family IV. Cyclopidae. 



Naked fishes with robust or elongate bodies; dorsal fin on anterior 

 portion of body; usually an adipose fin with or without a spine, or repre- 

 sented by a movable spine attached by a membrane to the caudal 

 peduncle; teeth in jaws in more than one series. 



These fishes inhabit mountain streams of the Andes of Peru to Vene- 

 zuela and Panama. 



14. Genus Cyclopium Swainson. 



Cyclopium Swainson, Nat. Hist. Fishes, II, 1839, 305 (type Pimelodus 



cyclopium Humboldt). 



Body elongate, naked, compressed anteriorly; teeth small; eye small, 

 superior; adipose fin a movable spine attached to caudal peduncle by 

 a membrane, or a long fin with or without a small embedded spine; ribs 

 moderately developed; caudal fin truncate or slightly emarginate, the 

 outer rays slightly produced. 



Small, naked fishes inhabiting mountain streams of the Andes of 

 Ecuador, Peru, Colombia, Venezuela, and eastern Panama. 



20. Cyclopium pirrense Meek & Hildebrand. 



Cyclopium pirrense Meek & Hildebrand, Field Mus, Nat. Hist. Pub., 



Zool, Ser., X, 1913, 83 (Rio Cana, Cana, Panama). 



Head 3.3 to 3.6; depth 5 to 6; D. I, 5; A. I, 5. 



Body robust, compressed posteriorly; head depressed, broad, its 

 width equalling its length; anterior teeth of upper jaw pointed, those of 

 the lower bicuspid; snout 1.8 to 2 in head; interorbital 3.4 to 4.1; origin 

 of dorsal over ventrals, its distance from tip of snout 2.2 to 2.4 in body; 

 maxillary barbel reaching slightly past eye; nostrils with a triangular 



