On the Fossil Fishes of the Carboniferous Limestone Series of Great Britain. 399 
The specimen is unique from the thick bedded Mountain Limestone of Settle, in 
Yorkshire. It is comprised in the magnificent collection of fossils from the York- 
shire limestone collected by the late Mr. Wood, of Richmond, and since purchased 
by Dr. Reed, of York, and presented to the museum of that city. In recognition of 
the generous donor and his kind assistance to myself, I venture to attach his name 
to this species. 
Formation and locality : Mountain Limestone, Settle, Yorkshire. 
Ex. Reed Collection, York Museum, 
Orodus tenuis, Davis. 
(EERIE i omnis) 
Teeth, transverse diameter very long in comparison to that of the antero-posterior ; 
crown, with a prominent median cone placed slightly towards one side, sub-rotund ; 
lateral extremities depressed, expanded anteriorly and posteriorly to the basal 
margins ; anterior basal margin prominent with slight tuberculations. A median 
ridge extends from the central cone to the ends, terminating sub-acutely. Surface 
smooth, coarsely punctate. Base, equal to crown in transverse diameter ; depth 
equal to height of median cone, retreating from front, posteriorly-concave. 
This species approaches nearly to Orodus elongatus but differs from it in the 
absence of antero-posterior lateral ridges and the depressed form of the lateral 
extensions of the crown. 
Formation and locality : Mountain Limestone, Armagh. 
Ex coll. Karl of Enniskillen. 
Orodus subteres, Agass. (sp.) 
(TPL, JbNlG, image, 1155}, i507.) 
Psammodus subteres—L. Agassiz, 1833. ‘ Poiss. Foss.,” Vol. III, pl. xii., figs. 3-4. 
Helodus 55 3 1838. 3 3 e ,», p- 105, pl. xii, figs. 3-4. 
55 an EK. G. Giebel, 1848. “Fauna der Vorwelt.,” Vol. I., pt. 3, p. 340. 
5 35 H. G. Bronn, 1848. ‘ Nomencl. Paleont.,” p. 585. 
PP 5 1849. ‘ Enumerator Paleont.,” p. 647. 
95 55 J. Morris, 1854. “Cat. Brit, Foss.,” p. 328. 
35 5 F. J. Pictet, 1854. ‘Traité de Paléont.,” Vol. II., p. 267. 
2 9 Morris and Roberts, 1862. “ Quart. Jour. Geol. Soc.,” Vol. XVIIT., p. 100. 
» 9p J. J. Bigsby, 1878. “Thesaurus Devon.-Carb.,” p. 397. 
Teeth, “straight, very long, elevated medially forming an obtusely rounded 
cone. The lateral portions are circular without ridges, uniformly covered with 
minute pores. The margin of the longest end projects slightly, it is uniformly 
punctate with the remaining surface.”—(Agassiz.) 
Professor Agassiz observes that this tooth, which still remains unique, might be 
taken for a gigantic example of Helodus levissimus, Agass., except that it lacks the 
highly polished surface of the latter, 
TRANS. ROY. DUB. SOC., N.S., VOL, I. 
