224 MR. J. W. KIRKBY ON FOSSILS IN THE 
Ancylus? Vinti, n. sp. 
Length +1,th. to ith. of an inch; breadth +}-th. to =4,th. of an 
inch. Sub-oval or nearly circular, with the posterior margin 
straight, flatly patelliform, with an eccentric, reflexed apex pos- 
teriorly placed, shell delicate, surface ornamented with several 
rather coarse concentric plaits. 
In the ironstone there were associated with the Ancylus, 
specimens of Beyrichia arcuata, Bean; and of another small 
Entomostracan related to Cythere or Cypris; also a few fish 
scales, and rarely, examples of Anthracomya acuta, which is very 
plentiful in one of the ironstone bands below; vegetable remains, 
some of which belong to Neuropteris and Asterophyllites also occur 
in the same bed as the Ancylus. Beyrichia arcuata and a few 
ganoid scales occur in the shale. 
A little further to the east, and, of course, a little higher in 
stratigraphical position, fish remains are more plentiful in a bed 
of black, carbonaceous shale. From it I have obtained two kinds 
of small ganoid scales,—one coarsely striate and with a serrated 
margin; the other with a plain margin and a more finely striated 
surface; both of which probably belong to species of Amblyterus. 
Also the scales of a small Holoptychius or Celacanthus ; the 
teeth of Diplodus gibbosus ; the ramus of a minute maxillary ; 
and a smooth bony spine about an inch long, and with an oval 
or nearly lenticular transverse section. ‘The same shale more- 
over contains some extremely delicate and obscure films of the 
size and shape of the Ancylus, though differing somewhat from 
that fossil in approaching still nearer to Estheria. 
Further to the west, between the fault and the Ancylus bed, 
and below high water mark, another bed occurs, containing fish 
remains. This stratum, which appears to be of no great thick- 
ness, may be described as a highly carbonaceous sandstone,—the 
arenaceous matter of the rock being extensively and irregularly 
intercalated with flakes of coal. Casts of large scales, spines, 
and bones are very plentiful in it; mineral charcoal and vegetable 
remains being associated. 
I have little doubt that both the latter beds would yield fossils 
of some value could they be fairly examined, which scarcely can 

