148 
ACTINOPTEEYGTI. 
. scheuchzeri by Agassiz, and employed as the basis for the 
specific description given above; Engi. Remains of 
the ventral ridge-scales are distinct both before and behind 
the pelvic fins. Enniskillen Coll. 
P. 1875, P. 3835, P. 4257. Seven large specimens variously im¬ 
perfect and distorted, labelled Clupea megaptera by 
Agassiz ; Engi. The finest specimen is in counterpart 
and elongated by distortion. Egerton 4'' Enniskillen Colls. 
41827. Slightly distorted fish about 0T3 in length; Engi. 
Purchased, 1869. 
P. 1875 a, P. 4257 a. Small imperfect fish, in counterpart, labelled 
Clupea megaptera by Agassiz ; Engi. 
Egerton ^ Enniskillen Colls. 
Clupea catopygoptera, sp. nov. 
[Plate YI. fig. 2.] 
1844. Clupea catopygoptera, L. Agassiz, Poiss. Foss. vol. v. pt. ii.. 
p. 120 (name only). 
Type. Nearly complete fish ; British Museum. 
A species of slender proportions, attaining a length of about 
0*1. Length of head with opercular apparatus somewhat ex¬ 
ceeding the maximum depth of the trunk and nearly equalling one 
quarter of the total length of the fish. Yertebrse slightly over 
40 in number, about half abdominal, half caudal. Dorsal fin as 
deep as long, with about 13 rays, and its origin twice as remote 
from the base of the caudal fin as from the occiput; pelvic fins 
arising opposite the anterior half of the dorsal, midway between the 
pectorals and the anal; the latter fin low and very remote, with 
about 15 rays. 
Form. Loc. Upper Eocene: Monte Bolca, near Yerona, Ital}^ 
P. 3829 a. Specimen shown of the natural size in PI. YI. fig. 2, 
labelled by Agassiz and to be regarded as the type of the 
species. The head and anterior abdominal region are 
slightly distorted, but the essential characters of the species 
are displayed. Traces of the ventral ridge-scales are 
observable in front of, but not behind the pelvic fins. 
Enniskillen Coll. 
P. 285. Large distorted specimen, in counterpart. 
Transferred from Museum of Practical Geology, 1880. 
