74 PERCID.E. 



1. Percarina demidoffii. 



Norclniann, I. c, Puiss. pi. 1. f. 1. 



^■^^\^r A-9-To- L-lat. 34-36. 

 In habit similar to Acerina cernvxi. Caiiclalis forked. Yellowish, 

 with round black spots on the back, and with a large brown semi- 

 lunar blotch on the neck. 

 Dniester. 



11. LUCIOPERCA. 



Lucioperca, Cav. B^gne Anim. ; Cut. 8f Val. ii. p. 110. 



Seven branchiostegals. Teeth in villilbrm bands, some on the 

 jaws and on the palatines being longer ; teeth on the palatine bones ; 

 tongue smooth. Two dorsals, the tii'st with 12-14, the anal fin 

 with two spines. Operculum spiniferous ; praeoperculum serrated, 

 with a simple edge. Scales small. 



Kivers of the Ai-ctic Regions. 



1, Lucioperca wolgensis. 



Perca wolgensis, Pall. Voy. {Trad. Fran^.) p. 99. pi. 8 ; Li/ui. Gniel. 



p. 1.309 ; Bl. Schn. p. 91. ^ 



Centropomus sandat, var., Lacep. iv. p. 263. 

 Perca asper, Pall. Zoor/r. Po.ss. iii. p. 247. 

 Lucioperca wolgensis, Cuv. ^ Val. ii. p. 117, vii. p. 441 ; Nordmann 



in Demidoff, Voy. Rims. Merid. iii. p. 363. pi. 1. f . 2 ; Gilntfier, 



Wiegm. Arch. 1854, p. 210. 



Operculum mth a rather obtuse and flat point behind ; crown, 

 operculum, prae- and suboperculum covered with scales ; 80-85 

 transverse rows of scales ; three cseca pylorica ; no large black spot 

 on the posterior part of the fii'st dorsal tin. 



Rivers of Southern and Asiatic Russia. 



2. Lucioperca ainericana. 



Lucioperca americana, Vah'iicicinics, ii. p. 122. pi. 16 ; Kirtland, Zool. 

 Ohio, p. 19, and Bost. Joiini. iv. p. 237. pi. 9. f. 2 (bad) ; Bich. Faun. 

 Bor.-Amer., Fishes, pp. 10 & 14; Dekat/, New York Fauna, Fishes, 

 p. 17. pi. 50. f. 163; Agass. Lake Super, p. 294. 



Operculum with a strong acute spine behind : occiput, operculum, 

 pr«- and suboperculum covered with scales ; 100 transverse rows of 

 scales ; three caeca pylorica ; a large black spot on the posterior pari 

 of the hi'st dorsal fin. 



Canada ; United States. 



a. Large specimen : stuffed. Albany River. Presented by Sir 

 J. Richardson. 



