cyprixidj:. 
305 
Genus LSUCISCUS (Klein), Cuvier. 
[Regne Animal, vol. ii. 1817, p. 194.] 
Premaxillae protractile. Pharyngeal teeth smooth, conical or 
compressed, in a single or double series. Ko barbels. Pseudo- 
branchiae present. Dorsal fin short, in middle of back, without 
bony spine; anal fin short, behind the dorsal; caudal fin forked. 
Scales large or of moderate size; lateral line low on the fiank, 
extending along the middle of the side of the tail. 
Leuciscus oeningensis, Agassiz. 
1708. Capito, J. J. Scheuchzer, Piscium Querelas et Vindiciae, pi. iii. 
1755. Figure by d’Argenville, Hist. Kat. eclaircie . . . Oryctologie, 
pi. xviii. fig. 2. 
1818. Cgprinm jeses, H. D. de Blainville, Nouv. Diet. d’Hist. Kat. 
vol. xxvii. p. 377 {errore). 
1832. Leuciscus oenmejensis, L. Agassiz, Keues Jahrb. p. 132. 
1835-39. Leuciscus oeningensis, L. Agassiz, Poiss. Foss. vol. v. pt. ii. 
p. 24, pi. Ivii. figs. 4, 5, pi. Iviii. 
1839-44. Leuciscus latiusculus, L. Agassiz, ibid. p. 26, pi. lia. figs. 4, 5. 
[Distorted fish; British Museum.] 
1861. Leuciscus lielveticus, T. C. Winkler, Descript. Poiss. Foss. 
d'Oeningen (Natuiirk. Verhandl. Holland. Maatsch. [2] vol. xiv.), 
p. 19, pi. iii. figs. 7, 9 (?fig. 6). [Imperfect fish ; Tevler Museum, 
Haarlem.] 
1861. Leuciscus oeningensis, T. C. Winkler, ibid. p. 20, pi. iii. fig. 8. 
Type. Imperfect fish ; oliin Lavater Coll., Zurich. 
A species attaining a length of about 0*18. Length of head with 
opercular apparatus somewhat less than the maximum depth of the 
trunk, which is contained three times or slightly more in the total 
length to the base of the caudal fin. Yertebrse 18 or 19 in the 
abdominal, 16 in the caudal region ; 13 pairs of ribs, the hinder- 
most comparatively small. Pelvic fins, with about 9 rays, arising 
slightly in advance of the dorsal, which also comprises 9 rays, the 
foremost being a short spine, the second articulated, the others 
both articulated and divided distally; anal fin with 12 rays, like 
those of dorsal; caudal fin moderately forked. 
The differences in proportions noted by xlgassiz between L. oenin¬ 
gensis and the so-called L. latiuscidus seem to be due to accidental 
distortion ; while the absence of the small hindermost pair of ribs 
in the former probably results from defective preservation. 
Form. Loc. Upper Miocene ; Oeningen, Baden. 
P. 9415. Yery large distorted specimen. Purchased. 
PART IV. 
X 
