72 PERCID^. 



9. ACERINA*. 



Acerina, Cuv. Rtgtic Anim. ; Cm: 4" l^'^d- iii- P- «5- 



Seven branchiostcgals. All the teeth vilHfurm, without ennines ; 

 no teeth on the palatine bones or on the tonp;ue. One dorsal with 

 thirteen to nineteen spines, the anal fin with t\\o. Operculum and 

 l)ra!operculum spinit'erous. Muciferous channels of the bones of the 

 skull very developed. Scales rather small. 



Rivers of the Palajarctic Keffion. 



1. Acerina cemua. 



Cernua fluviatilis, Bellon. Aqiiut. p. 291; Gcsner, pp. 101, 192, 22(); 



WilliKjhhij, p. 334 ; Bay, p. 144. 

 IVrcfc iltiviatilis g-onus minus, Gesner, pp. 701, 825. 

 I'iscis Danubii, ScbroU German., Gcsner, p. 29. f. 1(>1. 

 Porous fiuviatilis, I'erca fluviatilis minor, i&c., Grsner, f. 100 ft. 

 Perca minor, Porcu.s, Porcnlus, &c,, Srhonev. p. 50. 



flu\datili3 minor, Aldrov. v, cap. 34 ; Jonstun, iii. tit. 3. cap. 2. 



t. 28. f. . _ _ 



Danubii incola, Piscis SchroUus, Aldnrc. v. cap. 35. 

 ScroUus, Jonstun, iii. tit. 3. cap. 3. t. 28. f. a (right hand). 

 ScroUus danubianus, Willuqhhy, p. 335; Ray, p. 143. 

 Goldtisch, Schtvcnkf. Thcrunjr. Si/es. p. 441. 

 Perca no. 3, Artedi, Spec. p. 80. 

 no. 4, Artedi, Genera, p. 40. 



cemua, Lum. ; Gronov. Syst. ed. Gray, p. 112 ; Schcqffer, Plsc. 



Bavur. Batisbonensinm Pentas. ; Bloch, pi. 53. f. 2 ; Meidinyvr, t. 3 : 

 Don. Brit. Fishes, ii. pi. 39 ; Tnrton, Brit. Fauna, p. 100 ; Jciiyns, 

 Man. 334 ; Midler, Zool. Dan. Prodr. 392. 



Perca no. 1, Klein, Hist. Pise. v. p. 40. 



Duhamel, Pechrs, iv. p. 39. pi. 8. f. 1 ; Marsigli, iv. p. G7. tab. 23. f. 2 



(Perca no. 2). 

 Gvmnocephalu.s cernua, Bl. 6'cJin. p. 345; W/iite, Catal. of Brit. 



"Fishes, p. 12. 

 liolocentrus post, Laccp. iv. p. 357. 

 Cernua Ihiviatilis, Flem. Brd. Anim. p. 212. 

 Acerina vvdgaris, Cuv. i^- VaL iii. p. 4. pi. 41, vii. p. 448; Fries och 



EcMriim, Skand. Fish. p. 9. t. 1. f. 2; Yarrell, Brit. Fishe.s, i. 



p. 18 ; Cuv. Reyne Anim. III. pi. 0. f. 2 ; Nordmann in Demidof, 



Voy. Russ. Merid. iii. p. 3(58; Giinther, Fischc des Neckars, p. 14. 

 Acerina cemua, Giinther in Wieym. Archir, 1855, p. 199. pi. 10. f. 1, 2. 



D. '±^. A. gl. L. lat. 55-60. Vert. 15/20-21 (22). 

 Coco, pylor. 3. 



Greenish olive, marbled and spotted vdi\i brown; dorsal and 

 caudal fins brown-spotted. Head without scales. 



Rivei-s of England, France, Switzerland, Germany, Sweden, 

 Norway, Russia, Siberia. 



a. Adult. Danube, ((jymnothorcuv.) 



b. Adult. S^vitzerland. Presented by Prof. Aga.ssiz. 



» Acerina zillii, Gcrvais. Ann. 6V. i\VA 1848, p. 203, docs uol belong to llus 

 gciui3. — Algiers. 



