456 ^voodward: fossil fishes of the upper lias of whitby. 
The only fragment of Dcvpedius from Whitby which has 
received a distinctive specific name is a portion of the squama- 
tion in the collection of the late Sir Philip Egerton (now in 
the British Museum, No. P. 5 15), intended by Agassiz to be 
described as the type specimen of Dapedius micans. The scales 
are somewhat deeper than long, and apparently not serrated at 
the hinder border. Their exposed face seems to be abraded 
in the fossil, but the scales of the middle of the flank are 
clearly not tuberculated, and only marked by slight oblique 
corrugations. Such a specimen is, of course, inadequate for the 
purposes of a specific diagnosis. 
Family Belonorhynchid^. 
Belonorhynchus acutus, Agassiz, sp. 
1844. Belonostomus acutus, L, Agassiz, Poiss. Foss., vol. ii,, 
pt. ii., p. 142, pi. xlvii. a, figs. 3, 4. 
1858. Belonorhynchus 1 acutus, H. G. Bronn, Neues Jahrb., p. 12. 
1876. Belonostomus acutus, J. F. Blake, in Tate and Blake, 
Yorkshire Lias, p. 259. 
1887. Belonorhynchus acutus, K. A. von Zittel, Handb. Palseont., 
vol. iii., p. 222. 
1895. Belonorhynchus acutus, A. S. Woodward, Catal. Foss. 
Fishes B. M., pt. iii., p. 14, pi. ii., fig. 1. 
Tyjye : Imperfect skull ; British Museum. 
In 1844, Agassiz described and figured an imperfect skull 
and a fragment of jaw ''from the Whitby Lias," denoting a fish 
with a low cranium and extremely attenuated snout. He 
supposed at the time that these fossils belonged to his Jurassic 
genus Belonostomus, which had a skull of very similar general 
proportions ; but as they seemed to have the snout " more 
slender than in any other species, and especially more gradually 
tapering than that of B. muensteri,^' which was the next most 
slender form, he proposed to regard the Whitby specimens as 
representing a new species, B. acutus. At the same time he 
