On the Fossil Fishes of the Carbomferous Limestone Series of Great Britain. 385 
collection at Florence Court, (now at the British Museum, Cromwell-road), and 
also at the Natural History Museum, Newcastle-on-Tyne. 
Formation and locality : Carboniferous Limestone, Wensleydale and Pateley Bridge in Yorkshire ; Black 
Up. Carb. Limestone, Derbyshire.—(M‘Coy.) 
Ex coll. Wm, Horne, Esq. 
Pristicladodus concinnus, Davis. 
(IPL, 2IGIDSG, aver, 23})) 
Teeth, small, imperfect, breadth of base when complete ‘4 of an inch, height of 
median cone equals the width of base. Base expanded, thin, slightly crushed, crown 
consists of one median cone, upper central portion accuminate, rounded, with lateral 
cutting edge ; lower portion expanded on each side to the same width as the base ; 
surface enamelled, smooth, cutting edges minutely and beautifully denticulated, a 
fold between each denticulation is continued along the surface of the tooth. Anterior 
face convex, no lateral or secondary cones. 
This beautiful little tooth differs in details from Pristicladodus dentatus, it has 
nevertheless features in common with the genus, and it appears advisable to retain 
it in the genus, at any rate for the present. 
Formation and locality : Carboniferous Limestone, Wensleydale. 
Ex, coll. Wm. Horne, Esq. 
Pristicladodus goughi, M‘Coy. 
(EIEPXCIDXe io 277) 
Pristicladodus goughi—M ‘Coy, F., 1854. “ Brit. Paleoz. Fossils,” p. 643, pl. 3 K., fig. 11. 
>. Morris and Roberts, 1862. “ Quart. Jour. Geol. Soc.,” Vol. X VIIL., p. 101 
= s J. J. Bigsby, 1878. “Thes. Dev.-Carb.,” p. 363. 
Teeth, “‘crown compressed, triangular, moderately convex, marked with close, 
sharp, irregular, longitudinal striz, averaging five in one line, becoming obsolete 
at the apex, and close to the base of the crown ; cutting edges sharp, marked with 
broad, slightly-marked, tooth-like undulations, nearly their width apart, and generally 
blending at their base into the edge, being obsolete in the upper third of the cone ; 
lateral cones two, robust, sub-cylindrical, striated like the principal one. Height of 
principal cone, one inch two lines; width of whole tooth, one inch three lines ; 
width at base cight lines ; height of side cone five lines ; width at base three and a 
half lines ; lateral breadth of base six lines ; lateral breadth or thickness of principal 
cone four lines.’—(M‘Coy.) 
This example, from the Lower Carboniferous schists of Kettlewell and Kendal, 
located in the Woodwardian MuseumatCambridge, still remains unique. As already 
pointed out, it differs very materially from the type species, P. dentatus. It isa 
rounded, robust tooth, with strong secondary cusps, whilst P. dentatus is deeply 
compressed, and has no secondary cusps. ‘The lateral denticulations of the median 
3Q 2 
