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ON THE FOSSIL FISHES OF THE UPPER LIAS OF WHITBY. PART IV. 
BY ARTHUR SMITH WOODWARD, F.L.S., F.G.S., OF THE 
BRITISH MUSEUM (NATURAL HISTORY). 
PLATES LXVIII.-LXIX. 
Family Semionotid^e (coritinued). 
Dapedius micans, Agassiz, MS. 
1844. Dapedius micans, L. Agassiz, Poiss. Foss., vol. ii., pt. i., 
p. 304 (name only). 
Type : Specifically indeterminable scales ; British Museum. 
The laterally-compressed, round-bodied ganoid fishes of the 
genus Dapedius are abundant in the Upper Lias of Wiirtemberg ; 
but, so far as the present writer is aware, they are only repre- 
sented as yet by unsatisfactory fragments among the fossils 
from Whitby. It is true that Agassiz (oj). cit., vol. ii., pt. i., 
p. 218) mentions "two very beautiful examples" of Dapedius 
orbis from "the Liassic shales of Whitby," as having been 
exhibited by the Rev. M. Williams at the meeting of the 
British Association at Dublin in 1835. This species, however, 
is a typically Lower Liassic form, only definitely known from 
Barrow-on-Soar in Leicestershire; and as the specimens said to 
have been exhibited at Dublin have not been subsequently 
traced or noticed, it seems probable that there was a mistake 
concerning their origin. The record of Dapedius ovalis from 
Whitby {Tetragonolepis ovalis, Agassiz, op. cit., vol. i., p. 39) 
is equally uncertain ; though as this is an Upper Lias form in 
Wiirtemberg, it is more likely to occur than the previously- 
mentioned species. 
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