On the Fossil Fishes of the Carboniferous Limestone Series of Great Britain. 445 
Peecilodus foveolatus, M‘Coy. 
(Pl. LIII., fig. 26.) 
Peecilodus foveolatus—F. M‘Coy, 1848. “Ann. Nat. His.,” Sec. Ser., Vol. II., p. 129. 
7 F, J. Pictet, 1854. “Traité de Paleont.,” Vol. II., p. 270. 
a rs J. Morris, 1854. “Cat. Brit. Foss.,” p. 340. 
a F. M‘Coy, 1855. “Brit. Paleoz. Foss.,” p. 639., pl. 3 G., fig. 11. 
- 5 Morris and Roberts, 1862. “ Quart. Journ. Geol. Soc.,” Vol. XVIII., p. 101. 
% % J. J. Bigsby, 1878. ‘Thesaurus Dey. Carb.,” p. 363. 
Teeth, ‘“Longitudinally clavate, depressed, nearly three times longer than 
wide ; terminal end narrow, subtruncate ; surface obliquely crossed by nine or ten 
thick, flat, imbricating ridges, varying from one line to half a line wide ; they run 
nearly straight, but each has got an abrupt, angular bend about the middle which 
aiakes the posterior half of each edge seem about half a line further out than the 
anterior half—each imbrication has one, or rarely two rows of large, equidistant 
puncta, or small pits.” 
This species is founded on a fragment of a tooth, which still remains unique ; it 
is in the Woodwardian Museum, Cambridge. It is about 1:2 inch in length. Its 
narrow, elongate form and more numerous, flat, imbricating ridges, the row of 
notch-like curves, one on the edge of each, and the regular rows of puncta, dis- 
tinguish this species from P. jonesti, Ag. 
Formation and locality : Mountain Limestone, Derbyshire. 
Ex. coll. Woodwardian Museum, Cambridge. 
Peecilodus gibbosus, Davis. 
(Pl. LIIL, figs. 27, 27a.) 
Posterior teeth, probably of lower jaw, sub-pentagonal in outline, breadth 
“6 inch, length slightly less. Crown antero-posteriorly deeply convex, and 
inrolled posteriorly ; surface almost equally divided into two parts. Extending from 
the antero-lateral margin, which is slightly raised, one half the surface is formed 
by a wide and deep depression, transversely straight and smooth, longitudinally 
convex, and in front its area much constricted. ‘The latero-posterior half is occupied 
by a bold gibbous ridge, posteriorly broad, converging and profoundiy convoluted 
posteriorly ; its surface is traversed by a considerable number of segment-like 
transverse sulci which, however, do not extend to the depression of the surface on 
either side ; the latcro-posterior margin is slightly raised in the forin of a ridge, 
between it and the median one there is a narrow groove-like depression. Coronal 
surface enamelled, and punctate. The puncta on the median ridge are larger and 
more deeply impressed than on the remaining portions of the surface. Posterior 
margin sinuous, deeply concave where the depressed surface of the crown impinges. 
