Dr. R. II. Traquair on Palccozoic Fishes. 373 



atiis of Stock, l)ut differs from that species not only in being 

 a larger s])ine , but also in the much greater propoi-tioiial 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 Fritscli,of Prague, has thrown out the sugges- 

 tion that Ilarpacanthus may be not an Elasmobranch or 

 Chimajroid spine, but a " bezahnter Kiemenbogen " — a 

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

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

 elsewhere shown t 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 Chimeeroid fishes. 



Palseoniscidae. 

 Eiirylepis anglica, 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 Eiirylepis tuherculata, Newberry :}:, 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 Eiirylepis ; 

 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.G.S., by whom 

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

 British Museum. 



* 'Fauna der Gaskolile und der Kalksteine der Permformation 

 Bobmens,' Band iii. Heft 2. 

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



X Geol. Survey Ohio, Palseontology, vol. i. p. 350, pi. xxxviii. fig. 2 c. 



