82 GANOID FISHES OF THE CARBONIFEROUS FORMATION. 



Pygopterus. There can be no doubt tliat ''Ganacrodiis'' was founded upon the detached 

 teeth of some palaeoniscid fish, but the size given by Owen indicates a larger species 

 than Monichthys Eyertoni. A mandible and maxilla evidently belonging to E. Egertoni 

 were figured in 1874 under the designation " Palaoniscus" hy Mr. W. J. Barkas,^ who 

 also gave a description, with drawings of the microscopic structure of the teeth. 



In 1877 I transferred the species to Giebel's genus Elonichtliys, and in 1890 an 

 exceedingly perfect specimen from the North Staffordshire coal-field, now in the British 

 Museum, was figured by Mr. Ward from a drawing by myself and my wife, here 

 reproduced. 



Geoloyical Posilion and Localities. — An Upper CiU'boniferous fish, being unknown 

 below the Millstone Grit. The original specimens, as mentioned above, are from Silverdale 

 in Staffordshire, but it is especially abundant in the shale overlying the " Deep Mine " 

 ironstone at Longton and F'enton in the same county, from which bed many beautiful 

 entire specimens collected by Mr. Ward are in the British Museum, London, and in 

 the Museum of Science and Art, Edinburgh. Mr. Ward also mentions its occurrence in 

 the shale above the Woodhead coal, Cheadle coal-field. Detached scales from the Lower 

 Coal Measures of Halifax and Littleborough in Yorkshire are referred, with a query, to 

 this species by Mr. E. D. Wellburn. Going further north, it is found in the richly 

 fish-bearing roof-shale of the " low main " coal seam at Newsham, near Newcastle-on- 

 Tyne, its occurrence there having been first noted by Messrs. Hancock and At they. It 

 has also been obtained in the Coal Measures at Carluke, Lanarkshire (Rankine Collec- 

 tion, Hunterian Museum, Glasgow). 



13, Elgnichtuys PECTiNATUS, Traquaiv. Plates XIII, XIV, figs. 1 — 8. 



Elonichthys (?) PECTINATUS, Traquair. Proc. Roy. Soc. Ediiib., vol. ix, 1S77, 



p. \m. 

 Elonichthys pectinatus, Traiptair. Proc. Boy. Phys. Soc. Edinb., vol. v, 



188U, p. 121. Geol. Mag. (2), 

 vol. i.v, 1882, p. 545. Traus. Edinb. 

 Geol. Soc, vol. V, 1887, p. 315. 

 Proc. Geologists' Assoc, vol. xv, 

 1897, p. 144. 

 — — A. S. JVoodward. Cat. Foss. Fishes Brit. Mu?., 



pt. ii, p. 144. 



Specif c Characters.. — A large species, which probably attained a length of nearly 

 three feet. F^xposed surface of body-scales sculptured with oblique, subparallel, 

 prominent ridges occasionally branching and intercalated, and terminating behind in 

 <lenticulations of the posterior margin ; under surface showing a narrow area along the 



1 ' Monthly Rev. Dent, Surgery,' vol. iii, Xo. 6, 1874, figs, lix— Ixiv. 



