346 
ACTIXOPTERTGII. 
A portion of trunk, apparently of the existing Anguilla vulgaris, 
from the Quaternary of Pianico, Lombardy, is described by F. Bassani, 
Atti Soc. Ital. Sci. Js^at. vol. xxix. (1886), p. 347, pi. ix. fig. 1. 
Genus NETTASTOMA, Rafinesque. 
[Caratt. Alcuni j^uov. Gen., 1810, p. 66.] 
Snout much produced, slender and depressed ; teeth small and 
conical but of unequal size, in clustered bands. Pectoral fins 
absent; median fins much extended, passing continuously round 
the tail. No scales. 
Existing species in the deep sea off Japan and in the Mediter¬ 
ranean. 
Nettastoma bolcense, Bassani. 
1898. Nettastoma holeense, F. Bassani, Palaeontogr. Italica, toI. iii. 
p. 84, pi. ix. fig. 6. 
Type. Nearly complete fish; Geological Museum, ITniversity of 
Padua. 
A species attaining a length of about O’l, with approximately 
100 vertebrae. Head with opercular apparatus occupying about 
one fifth of the whole length of the fish. 
Form. Loc. Upper Eocene : Monte Bolca, N. Italy. 
Not represented in the Collection. 
The following specimens are not generieally and specifically 
determinable:— * 
P. 1887, P. 3880-81. Three very slender imperfect fishes, the 
longest O’17 in length ; Upper Eocene, Monte Bolca. 
The first two are labelled Leptocephalus taenia byEgerton 
and Agassiz respectively, this name having been proposed, 
^ without definition, by Agassiz, Neues Jahrb. 1835, p. 307. 
Egerton Emiiskillen Colls. 
P. 1888, P. 3879. Four very small, immature fishes, one being in 
counterpart and labelled LeptocepJialus gracilis by Egerton 
and Agassiz ; Monte Bolca. The name mentioned was 
proposed, without definition, by Agassiz (Neues Jahrb. 
1835, p. 307) for a specimen figured by G. 8. Yolta, Itti- 
olit. Veronese (1796), pi. xxiii. fig. 2. The species is 
also referred to by F. Bassani, Atti Soc. Yeneto-Trent. 
Sci. Nat. vol. iii. (1876), p. 189. 
Egerton Ennishillen Colls. 
2340c. Similar specimen, in counterpart; Monte Bolca. 
Purchased, 1849. 
