10. PEECARIKA. 73 



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



Collection. 

 iL e. Adult. Europe. Presented by W. Yarrcll, Esq. 

 /. Adult. Europe. 

 g. Adult : skin : not good state. England. 



2. Acerina rossica. 



Perca tanaicensis. Giildenstedt, Nov. Comment. Ac. Petrop. xix. 



p. 457. t. 2. 



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



Acerina rossica, Cuv. 4' Val. iii. p. 17, vii. p. 449; Nordmaim in 



Demidoff, Voij. Riiss. 3Iend. iii. p. 369. pi. 2. f. 2. 



0. Ig-^. A. ^^. L. lat. 55. Vert. 40. Csee. pylor. 3. 



Brown, spotted with black. 



Russian rivers falling into the Black Sea. 



3. Acerina schraetzer. 



Schraitser Ratisbonensis, Willuyhhy, p. 335 ; Ray, p. 144. 

 Perca no. 3, Schraz. Marsigl. iv. p. QS. t. 23. f. 8. 



no. 5, Artedi, Gentfu, p. 40. 



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



, Gronov. Zoojyhyl, no. "289. 



schrtetzer, Linn. Syst. Nat. ed. 12. gen. 168. sp. 31 ; Block, 



t. 332 ; Schceffer, Pise. Barar. Patisb(m. Pcntas. ; Meidinger, t. 2. 

 Gymnocephaliis scliraetzer, Bl. Schn. p. 345. 

 Holocentrus schraizer, Luccp. iv. p. 347. 

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

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



D. \^_\l. A.^^. L. lat 75. L. transv. ^g.. Vert. 15 23. 

 Cajc. pylor. 3. 



BroAvnish olive, with three or four black longitudinal bands 

 dorsal and caudal fins brown-spotted. 

 Danube. 



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



10. PERCARINA. 



Percarina, Nordmann m DemidofTs Voyage dans la Russie 3Idrid. iii. 

 p. 357: 



Seven branchiostegals. All the teeth viUiform, ^vithout canines ; 

 no teeth on the palatine bones ; tongue smooth. Two se})arate dorsals, 

 the first with ten, anal fin with two spines. Muciforous ca\'ities of 

 the bones of the skull much developed. Opci-culum \\'ith one spine ; 

 pi'a;opcrculiim denticulated, with simple edge-. Scales small. 



Dniesto]-. 



