214 CTPRINID-E. 



Hybrid between Leuciscus rutilus and Lenciscus 

 erythrophthalmus. 



{Scardiniojpsis, Jackel.) 



The practice initiated by Professor v. Siebold, to give to fishes 

 known to be hybrids not only specific but also generic names, has 

 already been followed by a Bavarian naturalist, A. J. Jackel, who, 

 having discovered a supposed hybrid between the Eudd* and Roach, 

 describes it under the high-sounding denomination of Scardiniopsis 

 anceps, mihi. It is said to have the phaiyngeal teeth deeply ser- 

 rated, sometimes in one series, 5 — 5, sometimes in two, 5 or 6 . 1 or 

 2 — 1 or 2 . 5. The mouth is terminal, more or less oblique ; body more 

 or less elevated. Origin of the dorsal fin in the vertical from the 

 extremity of the axillary scale of the ventral fins. L. lat. 40-42. 

 Sev^n longitudinal series of scales above the lateral line, and four be- 

 tween it and the ventral fin. D. 13. A. 14-15. Specimens of 

 this hybrid were found in Bavaria, and are described in Abhandl. 

 zool.-miner. Vereins Regensb. 1864, p. 64, and 1865, p. 44. 



"We may mention here that the fish shortly noticed by Valen- 

 ciennes as Leuciscus ajffinis (Cuv. & Val. xvii. p. 150) was believed by 

 fishermen to be a hybrid between the Roach and Rudd. 



Hybrid between Abramis brama and Leuciscus rutilus. 



{Abramidopsis, Siebold.) 

 The Pomeranian Bream. Der Leiter. 

 Oyprinus buggenhagii, Bl. Fische Deutschl, tab. 95. 

 Abramis leuckartii, Heckel, in Ann. Wieti. Mus. i. p. 229, taf. 20. 



fig. 5 ; Nordm. in Demidoff, Voy. Buss. Mirid. iii. p. 508 ; Cuv. ^ 



Vcd. xvii. p. 59; Heckel ^ Kner, Siisswasserf. p. 117. fig. 61. 

 buggenhagii, TJiompson, Proc. Zool. Soc. 1837, p. 56 ; or Nat. 



Hist. Ireland, iv. p. 137 ; Yarrell, Brit. Fish. 2nd edit. i. p. 391 ; 



3rd edit. i. p. 407; Couch, Fish. Brit. Isl. iv. p. 42, pi. 189. 

 Abramis lieckelii, Selys-Longch. Faun. Beige, p. 217, pi. 8. 

 Leuciscus buggenhagii, Cuv. 8f Val. xvii. p. 53. 

 Abramidopsis leuckartii, Siebold, Siisswasserf. p. 117. fig. 61 ; Jackel, 



Abhandl. zool.-nmiei-al. Ve>'. Regensb. 1864, p, 38 ; 1865, p. 36. 



It is due to the researches of Professor von Siebold that this fish 

 is shown to be in aU probability a hybrid between the common 

 Bream (^Abramis brama) and some species of Leuciscus, which can 

 hardly be any other than the Roach. The Pomeranian Bream is a 

 Roach-like modification of the Bream or a Bream-like modification 

 of the Roach, but, as is always the case with hybrids, some of 

 the apparently most essential characters are subject to variation. 



The pharyngeal teeth are in a single series, though Siebold has 

 met with rare exceptions in which an additional tooth was placed 

 in a second series. Anal fin with eighteen or nineteen rays. Back 

 of the trunk not compressed into an edge ; belly behind the ventrals 

 compressed into an edge, which, however, is covered with angularly 

 bent seniles. Snout short, obtuse , mouth terminal, with the jaws 

 nearly even. The height of the body is contained twice ajid three- 

 fourths or thrice in the total length (without caudal). L. lat. 48-50. 



