^98 



and Adwalton. From the latter locality, especially, several 

 very fine teeth, upwards of two inches in length, have been 

 obtained by Mr, Drabble, of Leeds, who was informed by 

 one of the pitmen that a large mass of scales, &c., in length 

 equal to one of the corves, had been brought up and broken 

 to fragments at the pit's mouth. Several small jaws occur in 

 the fish coal at Middleton, but whether belonging to the 

 young of the same species or of a second I cannot determine, 

 though M. Agassiz enumerates two species from Leeds, viz., 

 Megalichthys Hibberti and maxillaris, the latter of which 

 he does not describe or figure. Numbers of small Sauroid 

 teeth have been obtained in the stone Coal at Stanley, 

 Newton, and Overton, near Wakefield, associated with a 

 large proportion of Coprolites ; also at Rothwell Haigh ; 

 and in the roof of the better bed of Coal at Low Moor, 

 but more sparingly. 



The fins, scales, and operculi of a species of Acanthodes, 

 as also the scales of two or three species of Holoptychius, 

 are not uncommon in the Middleton fish coal. The latter, 

 I presume, belonging to Holoptychius sauroides, and 

 minor, which Agassiz enumerates as from Leeds. He 

 also mentions Platysomus parvulus and Diplopteris carbon- 

 arius. In whose possession these are, or from what part 

 of the neighbourhood, I cannot ascertain. The last fish I 

 shall have to mention is Coelacanthus Phillipsi, of which a 

 portion, appearing to be the tail, was found in the centre of 

 a baum pot, near Halifax, and now belongs to the Museum 

 of the Philosophical Society of that town. A second 

 species, C. lepturus, is recorded by Agassiz from this 

 neighbourhood, but of which I know nothing. 



Proceeding from the only vertebrate animals found in the 

 Carboniferous system, we are led, owang to a remarkable- 

 peculiarity in the Yorkshire Coal Field, (I mean the occur- 

 rence of a purely marine deposit, or at least a seam of Coal 

 characterized by containing only marine animals, known as 



I 



