192 Dr Hissert on the Limestone of Burdiehouse 
A second fish is considered by M. Acassiz as constituting a 
new genus of the same Lepidoid family, referable to his Lepi- 
doides hétérocerques. (See the Plates of the first volume of Re- 
cherches sur les Ossemens Fossiles.) This genus is considered as 
coming near to that of the Palzoniscus and Platysomus. M. 
Agassiz writes to me regarding the fish as follows: “ I intend to 
call it Eurynorus. What characterises it the best is the great 
size of the dorsal fin which occupies the whole back, as in the 
Platysomus, the anterior rays of which are very much elongated. 
Fig. 4. of Plate VII. does not give a complete idea of it, the 
anterior edge of the dorsal fin being much more elongated. M. 
Jameson has placed in my hands some, almost perfect, specimens 
of the fish, which, at first, I did not recognise, so remarkable 
was their aspect. The anal fin is narrow, but its rays are elon- 
gated. The general form of the body is rather that of the Am- 
blypterus than of the Paleoniscus, but its double fins, the pec- 
torals and the ventrals, have fewer rays, and these rays are longer. 
The scales (which, like other parts of the fish, are not very well 
preserved in the specimen of the Royal Society) are not so long 
as they are high, and their posterior edge is crenulated and in- 
dented ; for which reason, I have called this species, hitherto the 
only one known of the genus, Eurynotus crEeNatus.” 
A third fish, referable to the Lepidoid family, is a species of 
Amblypterus (Agassiz), of which I possess no drawing nor de- 
scription. It will doubtless be noticed in the “ Recherches sur 
les Poissons Fossiles.” 
SECTION VIII.—THE SAUROID CHARACTER OF CERTAIN OSSEOUS REMAINS 
ENCLOSED IN THE LIMESTONE. 
A circumstance of no little interest, connected with the or- 
ganic remains which had been disclosed during the progress of 
quarrying, was the question which they involved regarding their 
conceived saurian character. 
In the first place, a large tooth was obtained, having no little 
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