240 FISHES. 



2. P. noiatus, Ag. POXD PERCH. More elongated; 

 ear-flap about as above; a dusky band to eye; light 

 olive, silvery below; spines rather slender; pectoral fins 

 elongated; no dorsal spot; D. X, 11; A. Ill, 10; lat. 1. 

 37. Headwaters of Tennessee R., abundant. 



3. P. pal I id us, Ag. PALE SUN FISH. Resembles 

 Ichthelis incisor, but with a larger mouth; dorsal with a 

 black spot behind; fins with dark markings; orange on 

 ear-flap narrow; olive green, sides with eight or nine 

 dusky bars. Tennessee R. 



FAMILY XCIIL APHREDODERID^E. 



(The Pirate Perches.} 



Vent jugular, in front of the ventral fins; dorsal fin 

 single, high, with but three spines; ventrals thoracic, 

 without spines and with more than five soft rays; some 

 bones of head spinous; teeth on jaws and palate; scales 

 ctenoid; branchiostegals six; ccecal appendages about 

 twelve; air bladder simple. 



A single species known from the waters of the Eastern 

 and Southern States. It is remarkable for its voracity 

 and for its nocturnal habits. The unusual .position of 

 the vent (as in Amblyopsidce] distinguishes it widely 

 from the Percoid fishes. 



/, APHREDODERUS, LeSueur. PIRATE PERCHES. 



1. A. sayanus, (Gilliams) DeK. PIRATE PERCH. 

 Head 3 in length; depth 3f ; greenish olive; a sub- 

 orbital bar; caudal rounded; lower jaw longest; D. Ill, 

 11; A. II, 7; lat. 1. 48; length 5 inches. N. Y. to La., 

 in brooks near the coast. 



