192 Dr Hibbert on the Limestone of Burdiehouse 



A second fish is considered by M. Agassi z as constituting a 

 new genus of the same Lepidoid family, referable to his Lepi- 

 doides heterocerques. (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 Palaeoniscus and Platysomus. M. 

 Agassiz writes to me regarding the fish as follows : " I intend to 

 call it Eurynotus. 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 Palaeoniscus, 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 crenatus." 



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 VIIL— 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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