136 PROCEEDINGS OF THE ACADEMY OF [1885. 



ON THE GENUS APHREDODERUS. 

 BY WILLIS S. BLATCHLEY. 



With a view to ascertaining whether more than one species of 

 Pirate Perch {Aphredoderus Le Sueur) exists in our waters, I 

 have compared numerous specimens from various localities of 

 the United States, in the Museum of the Indiana University. 



I find individual variations, but no constant differences distin- 

 guishing Eastern, Western or Southern forms of this species 

 from one another. 



Since the variation in the position of the vent, upon which the 

 nominal genus Sternotremia Nelson was based, has been shown 

 by Profs. Forbes and Jordan to depend upon the age of the fish, 

 there is, in my estimation, but one species, Aphredoderus sayanus, 

 belonging to the genus. 



The following is the synonymy of the genus and species :. — 



Aphredoderus (Le Sueur) Cuv. ,t Val., Hist. Nat.des Poiss., ix, L833, 115 (gibbosus). 

 Aphredodirus Cope, Proc. Amer. Phil. Soc, L870, 455 (emended orthography). 

 Sternotremia Nelson, Bull. Til. Lab. Nat. Hist., i. 1876, 39 (isolepia). 

 Aphododerus Jordan, Annals X. Y. Acad. Sei., i. 1 s 7 7 , No. 4, 101 (emended 

 orthographj . 



Asternotremia (Nelson), Jordan, Bull U. S. Nat. Muf., x, 1S77, il {isolepia: 

 emended meaning). 



Aphrodedirus .Ionian, Proc. icad. Nat. Sri. Phil., 1877, 60 (emended orthographj . 



Aphredoderus sayanus. 



Scolopsia sayanus Gilliams, Join-. Acad. Mat. Sei. Phila., iv. 1824, si 

 1 Harrowgate, Pa. i. 



Aphredoderus sayanus De Kay, N. Y\ Fauna, Fishes, 184'2. 35; Baird, 

 Ninth SinilliM.il. Kept.. 1855, 326 (Cedar Swamp Cr., Cape May Co., 

 N. J.); Giinther, Cat. Fish. Brit. Mas., i. 1859, 271 ; A-bbott, Proc. 

 Acad. Nat. Sei. Phila.. 1861, 95 (Camden, N". J., Habits of A. sayanus); 

 Co] e, Proc. Acad. Nat. Sei. Phila., 1865, 274 (Streams of Lowlands of 

 N. .1. and Del.); Putnam, Amer. Nat., Jan., 1872,3."); Jordan & 

 Copeland, Check List. L876, 139; Hay, Proc. U. S. Nat. Mus., iii, 

 1880, 501, 515 Noxubee 1!.): Jordan. Geol. Kept. Ohio, iv, L882, 920; 

 Hay, Bull. U. S. Fish. Com., ii. 1882, 64, M (R. at Vicksburg and 

 Memphis, Big Black R., Pearl R., Tombigbee R., Chickasawha R.); 

 Jordan <& Gilbert, Synopsis Fish. \. A.. 1882, L60 ; Bean, Cat. Fish. 

 International Fish Exhibition, London, 1883, 82 (Vaughan's, Mis-. : 

 Forbes, Studies f F I of Fishes, 111. Lab. Nat. Hist., L883, 66 



