ELOPID^. 
P. 634. The type specimen labelled by Agassiz. It is the much- 
abraded cranium, wanting the region in advance of the 
postfrontals. The parietal bones are almost completely 
removed, thus exposing the supraoccipital which extends 
forwards beneath them. The characteristic otic region is 
well shown on tbe right side, and the basicranial canal is 
indicated beneath the axis of the cranium. Egerton Coll. 
The following skull also appears to belong to a species of Megaloios., 
characterised by a relatively short otic region, the length of the 
cranial roof from the occiput to the postfrontal not exceeding half its 
width at the position of the latter element:— 
P. 9192. Cranium 0T25 in length; London Clay, Sheppey. The roof 
exhibits the characteristic arrangement of the bones, and 
the basicranial axis is bent upwards as usual at the ante¬ 
rior end of the otic region. The presence of a basicranial 
canal is clearly indicated, but there does not appear to be 
a vertebral centrum fused with the basioccipital. The 
parasphenoid is abraded, but the spatulate vomer is shown 
to have been covered with minute teeth. The long laminar 
entopterygoid is preserved on the left side, but its exposed 
oral face is abraded. History unhiown. 
Genus NOTELOPS, novum. 
Trunk somewhat laterally compressed. Parietal bones in contact 
in the median line; mandible a little prominent and gape extending 
to the hinder border of the orbit; margin of the jaws and some of 
the inner bones with small conical teeth. Operculum subdivided by 
a transverse suture. Vertebral centra slightly constricted, smooth 
or delicately striated, perforated for the passage of a remnant of the 
notochord. Pectoral fin with an enlarged and elongated scale at its 
base ; dorsal fin opposite or nearly opposite the pelvic pair; anal 
smaller than the dorsal fin ; caudal fin deeply forked ; no fin-rays 
excessively elongated. Scales usually ornamented with delicate 
radiating ridges ; a few very small thin scales extending over the 
caudal fin : lateral line inconspicuous. 
' Notelops brama (Agassiz). 
1833. Amblypterus olfersi, L. Agassiz, Poiss, Foss. vol. ii. pt. i. p, 40. 
1841. Phacolepis brama, L. Agassiz, Edinb. Aew Phil. Journ. vol. xxx, 
p. 83. 
