118 Proceedings of the Boyal Physical Society. 



ISTumerous remains of a pretty large Acanthodian fish 

 have been collected at West Calder by Mr Peach, and at 

 Oakbank by Messrs Gibson and Stock, which may be re- 

 ferred to Acanthodes, though it would be premature to 

 identify them with any described species. They consist of 

 fragments of the body; the best, from Oakbank, in the 

 collection of Mr Gibson, displays nearly the entire pectoral 

 fin, in addition to a crushed and unreadable portion of the 

 head. The scales are proportionally minute, smooth, and 

 shining on the outer surface, and without any trace, so far 

 as I have seen, of the longitudinal furrow or sulcus described 

 by Agassiz as characteristic of his Acanthodes sulcatus from 

 Wardie. It is, however, unfortunate that A. sulcatus was 

 founded upon a very small fragment (now in the Oxford 

 Museum) of the scaly covering of the body, so that its satis- 

 factory comparison with other fragmentary specimens is 

 attended with difficulties. Meanwhile, it seems safer to 

 wait for the acquisition of further material before deciding 

 as to the species of these Acanthodians from West Calder 

 and Oakbank. 



(2.) Nematoptychius Greenochii, Ag. sp. 



Pijgopterus Greenochii — Agassiz: "Poissons Fossiles," t. ii., pt, 2, p. 78. 

 NematoptijcMus G^remocM— Traquair: "Ann. and Mag. Nat. Hist." (4), xv., 

 1875, p. 258. 



Several heads of this large and beautiful Palseoniscid fish 

 have been found at Oakbank by Messrs Gibson and Stock, 

 and there is one badly preserved in the collection of fossils 

 at the West Calder Oil Works. One specimen in the collec- 

 tion of Mr Gibson shows, besides the head, a portion of the 

 body, in the abdominal part of which there are contained 

 portions of the shagreen-like scaly covering of a small Acan- 

 thodes, of which the larger fish had evidently made a meal 

 shortly before its death. 



The remains of Nematoptychius Greenockii are of frequent 

 occurrence in the Lower Carboniferous rocks of Scotland. 

 Besides West Calder, the following localities may be quoted : 



In the Calciferous Sandstone Series — Wardie, and Water of 



