344 
ACTIXOPTEEYGII. 
1839-44. Enchelyopus tigj'inus, L. Agassiz, Poiss. Foss. vol. v. pt. i. 
p. 16, pt. ii. p. 137, pi. xlix. / n 1 1 ^ 3 »S ) 
1864. Paranguilla, P. Bleeker, Atlas Iclitlijol. vol. iv. p. 8. 
1876. Enchelyopus tigrinus, F. Bassani, Atti Soc. Veneto-Treiit. Sci. 
^ ' Nat. Yol. iii. p. 189. 
Type. Nearly complete fish; Paris Museum of Natural History. 
The type species, attainiog a leugth of about 0*35. Length of 
head with opercular apparatus contained between nine and ten 
times in the total length to the base of the caudal fin ; anal fin 
two thirds as long as the dorsal. Skin both of trunk and median 
fins mottled with large pigment spots. 
Form. Log. Upper Eocene : Monte Bolca, N. Italy. 
Not represented in the Collection. 
Genus ANGUILLA, Shaw. 
[General Zoology, vol. iv. 1803, p. 15.] 
Extremity of rostrum slightly expanded laterally for articulation 
with maxillse ; teeth small and arranged in longitudinal'bands or 
series. Opercular apparatus well-developed, and the long, slender 
branchiostegal rays curving round it. Pectoral fins present; dorsal 
fin arising far behind the occiput, extending round the tail and 
continuous with the anal fin. Eudimentary scales embedded in 
skin. 
Existing species both in the freshwaters and on the coasts of 
temperate and tropical regions. 
Anguilla leptoptera, Agassiz MS. 
1796. Murcena conger^ G. S. Volta, Ittiolit. Veronese, p. cvi. pi. xxhi. 
fig. 3 [errore). 
1835. Anguilla leptoptera, L. x4gassiz, Neues Jahrb. p. 292 (name 
only). 
Tygoe. Nearly complete fish ; Paris iMuseum of Natural History. 
A slender species attaining a length of about OB. Length of 
head with opercular apparatus contained between nine and ten 
times in the total length to the base of the caudal fin; anal fin 
somewhat more than one and a half times as long as the portion 
of trunk in front of it; dorsal fin arising about midway between 
the pectorals and the anal fin. About 130 vertebrae. 
Form. ^ Log. Upper Eocene : N. Italy. , 
P. 1890, P. 3876. Well-preserved specimen, in counterpart, bent 
and broken at the middle of the abdominal region ; Moifte 
A 
