CATALOGUE OF VERTEBRATES. 731 



" Generally found in protected corners of rapid streams, rest- 

 ing on a flat stone or the level sand. In its movements it is 

 very similar to P. ccerukus. Concerning its breeding habits 

 the writer has gathered no particulars." [C. C. A.] 



PEROA, L. 



P. americana, Schranck (Bodianus flavescens, acuta, gracilis, fluviatilis). 

 Yellow Perch. American Perch. Ringed Perch. 



Back dark olive; sides yellow, with six to eight bars; belly 

 pale; lower fins red or orange; cheeks closely scaled, scales 

 imbricated ; opercles naked, armed with one spine, preopercle 

 serrated. Dorsal rays, XIII 1, 14 ; lateral line complete. 



" This well-known species is found more or less abundantly 

 throughout the State. In the Delaware River, specimens of 

 unusual size have been taken, weighing over four pounds." 



STIZOSTEDIUM, Raf 



(Lucioperca.) 



S. vitreum, Mitch, (americana, salmonea.) Wall-eyed Pike. Dory. 

 Glass-eye. Yellow Pike. Blue Pike (Far.) Jack Salmon. 

 Susquehanna Salmon. 



Pseudobranchs developed ; branchiostegals seven ; preopercle 

 serrate; canine teeth in jaws and on palatines; body slender, 

 fusiform ; dark olive, finely mottled with brassy ; lower jaw 

 flesh color ; belly and lower fins pinkish ; black blotch on 

 spinous dorsal. Dorsal rays, XIII I, 21; anal rays, II, 12; 

 lateral-line scales, 90 ; reaches a length of nearly three feet and a 

 weight of ten to twenty pounds. Some have been put into the 

 Delaware by Pennsylvania authorities. 



Family SZRRANIDJE. 



(Percidse.) 

 Sea Bass. 



Body oblong, compressed ; with usually ctenoid scales ; mouth 

 horizontal, posterior part of maxillary not slipping under edge of 



