10. I'ERCAKINA. 73 



r. Several specimens. Gotha River (Sweden). From Mr. Lloyd's 



Collection. 

 (L c. Adult. Eiirojic. Presented by W. Yarrcll, Esq. 

 /. Adult. Europe. 

 <j. Adidt : skin : not good state. England. 



2. Acerina rossica. 



Perca tanaicensis, G'dldemtedt, Nov. Comment. Ac. Petro}}. xix. 



p. 4.57. t. 2. 



acerina, Pall. Zoof/r. iii. p. 244. 



Acerina rossica, Ciir. (^- Val. iii. p. 17, vii. p. 449; Nordmann in 



Demidoff, Voy. Russ. 3Icrid. iii. p. 369. pi. 2. f. 2. 



D. itl-^. A. ^^. L. lat. 55. Vert. 40. Ciec. pylor. 3. 



BrowTi, spotted with black. 



llussian rivers falling into the Black Sea. 



3. Acerina schraetzer. 



Schraitser Ratisbonensis, Willmjhhy, p. 33-5 ; Ray, p. 144. 

 Perca no. 3, Schraz. Marsigl. iv. p. 68. t. 23. f. 3. 



no. 5, Artedi, Genera, p. 40. 



no. 2, Klein, Hist. Pise. v. p. 41. 



, Gronov. Zuophyl. no. 289. 



sclirpetzer, Linn.- Syst. Nat. ed. 12. gen. 108. sp. 31 ; Block, 



t. 332 ; Schieffer, Pise. Barar. Ratisbon. Pentas. ; Meidinger, t. 2. 

 Gyninocepbalus schrjctzer, Bl. Schn. p. .345. 

 Ilolocentrus scbraizer, Lacep. iv. p. 347. 

 Perca danubiensis, Gronov. Syst. Nat. ed. Gray, p. 112. 

 Acerina scbraitzer, Cuv. ^ Val. iii. p. 13. 



D-I'lls- ^-iry L. lat. 75. L. transv. ^^. Vert. 15/23. 

 CtEC. pylor. 3. 



Brownish oUve, with three or four black longitudinal bands; 

 dorsal and caudal fins brown-spotted. 

 Danube. 



a, b. Adidt. Switzerland. Presented by Prof. L. Agassiz. 



10. PERCARINA. 



Percarina, Nordtnann in Demidoff' s Voyage dans la Russie 3Iirid. iii. 

 p. 357. 



Seven branchiostegals. All the teeth villifonn, without canines ; 

 no teeth on the palatine bones ; tongue smooth. Two separate dorsals, 

 the first with ten, anal fin with two spines. Mucifcrous ca\T[ties of 

 tlie bones of tlu^ skull much developed. C)i)erculuni with one spmc : 

 pneopercuhim denticulated, with simple edge. Scales small. 



Dnicstci". 



