On the Fossil Fishes of the Carboniferous Limestone Series of Great Britain. 523 
Cheirodus pes-ranze, M‘Coy. 
(Pl, JUO, megs, Gy, Se) 
Cheirodus pes-rane—F. M ‘Coy, 1848. “Ann. and Mag. Nat. Hist.” 2nd ser., Vol. IT., 
p- 131. 
$ 3 J, Morris, 1854. “Catal. Brit. Foss,” p. 321. 
“4 i F. J. Pictet, 1854. “Traité de Paléont,”’ Vol. IL., p. 269. 
3 Bs F. M‘Coy, 1855. “ Brit. Paleeoz. Foss.,” p. 616, pl. 3 G, fig. 9. 
BS Morris & Roberts, 1862. “Quart. Journ. Geol. Soc.,” Vol. XVIIL., p. 99. 
5 3 J. J. Bigsby, 1878. ‘Thesaurus Devon.-Carb.,” p. 349. 
Teeth, length -65 of an inch, narrow; anterior lobes narrow, prominent, rounded, 
arched, separated by deep concave furrows; the inner lobe about a line longer 
than the next outer one: at the base of the former, or about half the length of 
the whole tooth, there projects horizontally inwards from the inner margin a short, 
wide, slightly recurved, flattened lobe, about +1 inch long; posterior part of the 
tooth flattened : surface under a lens finely punctured. 
This species is founded on a single specimen in the Woodwardian Museum. 
In general appearance it resembles the teeth of Ceratodus of the Devonian 
rocks. 
Formation and locality : Shales in Mountain Limestone, Derbyshire. 
Ex coll. Woodwardian Museum, Cambridge. 
Genus.——Colonodus, M‘Coy. 
Colonodus.—F. M‘Coy, 1848. “Ann, and Mag. Nat. Hist. ;’ 2nd ser., Vol. II., p. 5. 
“Tooth, elongate-conic, very gradually tapering, section round near the base, 
becoming trigonal towards the apex: front even, sides impressed with short, 
alternating, transverse wrinklelike furrows; enamel-like surface smooth, highly 
polished, longitudinally marked with few, distant, minute impressed striz; it 
terminates obliquely at the base, the edge being slightly notched or wrinkled : base 
forming a short slightly dilated round disc, placed obliquely to the axis of the tooth, 
and extending further behind than in front, truncated below, and of a coarse osseous 
texture ; medullary cavity about one-third the diameter of the tooth, cylindrical, 
from which, under the microscope, the flexuous, distant calcigerous tubes are seen 
to radiate directly to the surface, towards which they become gradually finer and 
closer.” 
Colonodus longidens, M‘Coy. 
(Pl. LXIIL, fig. 6.) 
Colonodus longidens—F. M ‘Coy, 1848. “Ann. and Mag. Nat. Hist.,” 2nd ser., Vol. I1., 
p. 9. 
» » J. Morris, 1854. “Catal. Brit. Foss.” p. 323. 
F. J. Pictet, 1854. “Traité de Paléont.,” Vol. II., p. 149. 
Morris & Roberts, 1862. “Quart. Journ. Geol. Soc.,” Vol. XVIIL, p. 100. 
» » J. J. Bigsby, 1878. “Thesaurus Devon.-Carb.,” p. 351. 
