550 



NILOTIC PERCH. 



Perca Nilotica. P. fusca, pinnis dorsalibus subdisiinctis, cauda 

 Integra. 



Brown Perch, with subdistinct dorsal fins, and entire tail. 

 Perca Nilotica. Lin. Gniel. 



Native of the Nile, but has also been observed 

 in the Caspian seas. 



OCELLATED PERCH. 



Perca Ocellata. P. pinnis dorsalibus sutiunitis, ocello ad pinnae 



caudce basin. Lin. Gmel. 

 Perch with subunited dorsal fins and an ocellate spot at the 



base of the tail. 



First ray of the dorsal fin very short : tail marked 

 on the upper part of the base by a black ocellated 

 spot bordered with white. Native of the American 

 seas. 



SMALL PERCH. 



Perca Pusilla. P. rubro-*argentea, scabm, ovata, compressa* 

 Silvery-red, rough, ovate, compressed Perch. 

 Perca pusilla. Lin. Gmel. Brum. pise, massil. 



An extremely small species, scarcely exceeding 

 the length of an inch and half : back convex : scales 

 small, pointed, and rough : head spiny : native 

 of the Mediterranean. 



