Dr. R. H. Traquair on Palceozoic Fishes. 373 



atus of Stock, but differs from that species not only in being 

 a larger spine , but also in the much greater proportional size, 

 stoutness, and smaller number of the recurved denticles. In 

 both species these denticles form a single row. 



Lower Carboniferous; in shale in connexion with the 

 " Blue Coal," Niddrie Colliery, near Edinburgh. 



Prof. Anton Fritsch, of Prague, has thrown out the sugges- 

 tion that Harpacanthus may be not an Elasmobranch or 

 Chimasroid spine, but a u bezahnter Kiemenbogen " — a 

 teleostomous gill-arch witli anchylosed gill-rakers, as in his 

 Trissolepis from the Bohemian gas-coal *. I have, however, 

 elsewhere shown f that the configuration of these bodies 

 renders this view untenable, and my belief is that they were, 

 like the spine of Squaloraia, median appendages on the heads 

 of Chimseroid fishes. 



Palseoniscidae. 

 Eurylepis anylica, sp. n. (PI. IX. fig. 9.) 



This is the posterior part of a cranial shield, representing 

 the fused parietals, frontals, and squamosals ; it is £ inch in 

 length and the same in breadth across the parietal region. It 

 is ornamented with tolerably coarse rounded ridges, which are 

 comparatively slightly elevated and mainly follow a direction 

 concentric with the margins of the respective bones, except 

 at the anterior angle of each frontal, where there is a group 

 of ridges, which pass obliquely inwards and a little back- 

 wards, so as in the middle line to meet those of the opposite 

 side at an obtuse angle. 



This little relic is almost identical with the similar cranial 

 shield of Eurylepis tuberculata, Newberry \ 7 from the Coal- 

 measures of Linton, Ohio, but differs in the ornament being 

 more of a ridged than tuberculated character. 



Messrs. Hancock and Atthey mention, without description, 

 the occurrence of a fish in the Northumberland coal-field, 

 which they suspected might belong to Newberry's Eurylepis ; 

 but there cannot be any doubt of the generic position of this, 

 the first figured English specimen. 



From the Ash Coal-shale, Upper Carboniferous, Longton, 

 Staffordshire. Collected by Mr. J. Ward, F.Gr.S., by whom 

 it was lent to me for description ; the specimen is now in the 

 British Museum. 



* 'Fauna der Gaskohle und der Kalksteine der Permformation 

 Bbhmens,' Band iii. Heft 2. 



t Geol. Mag. (3) vol. x. 1893, p. 178. 



\ Geol. Survey Ohio, Palaeontology, vol. i. p. 350, pi. xxxviii. fig. 2 c. 



