514 On the Fossil Fishes of the Carboniferous Limestone Series of Great Britain. 
a short, sharp, crested carina, and by its possession of a single fold of enamel only 
along the base of the crown. 
Formation and locality : Carboniferous Limestone, Wensleydale. 
Ex coll. Wm. Horne, Esq., Leyburne. 
Genus.—Harpacodus, Agass. MSS. 
Ref.: “Annals and Magazine of Nat. Hist.,” Dec. 1881, p. 424. 
Teeth small ; crown slightly convex, strong ; cutting edge very slightly circular, 
divided into 5-8 deeply-cut, broad and strong denticulations; base of crown promi- 
nent, with a single broad fold of ganoine, deeper posteriorly than in front ; root at 
its junction with the crown much constricted ; lower it is expanded, large and 
tumid. 
Harpacodus dentatus, Agass. MSS. 
GPL, IDX, 1% ILO.) 
Ctenoptychius dentatus—L. Agassiz, 1833. “Rech. s. |. Poiss. Foss.,” Vol. III., pp. 173 
and 383. 
a5 macrodus, 3 1833. “Rech. s. 1. Poiss. Foss.,” Vol. III., pp. 173 
and 383. 
Petalodus dentatus— R. Owen, 1840. ‘“ Odontography,” p. 62. 
Ctenoptychius macrodus—J. E. Portlock, 1843. “Geol. Rept.on Londonderry,” p. 467, pl. xiv., 
fig. 7. 
Petalodus dentatus, % 1843. ‘Geol. Rept. on Londonderry,” p. 467. 
Ctenoptychius a C. G. Giebel, 1848. “ Fauna der Vorwelt,” Vol. I., pt. 3, p. 345. 
- macrodus s5 55 5 s 59 96 
*s “3 H. G. Bronn, 1848. “ Nomencl. Paleont.,” p. 356. 
a dentatus . +p $5 3 0 
is . - 1849. “ Enumerator Paleont.,” p. 646. 
5 macrodus ts 5 ri A an 
aa Fe J. Morris, 1854. “Catal. Brit. Foss.,” p. 324. 
es dentatus * 3 yy ss a 
5 sy F. J. Pictet, 1854, “ Traité de Paléont.,” Vol. II., p. 264. 
" macrodus 5 55 59 5 a os 
Harpacodus dentatus— LL. Agassiz, 1859. “ Enniskillen Coll. MSS.” 
os 5 Morris and Roberts, 1862. ‘ Quar. Journ. Geol. Soc.,” Vol. X VIIT., p. 100. 
ey s Enniskillen, 1869. “Catal. Type Spec.,” p. 5. 
Ctenoptychius ,, Young & Armstrong, 1871. “Trans. Geol. Soc., Glasgow,” Vol. ill, 
Supt., p. 71. 
| Armstrong, Young, 
and Robertson, 
5 3 £ J. J. Bigsby, 1878. “ Thes. Devon.-Carb.,” p. 353. 
Harpacodus __,, J. W. Davis, 1881. “ Ann. and Mag. Nat. Hist.,” p. 426. 
,, (Harpacodus) ,, f 1876. “ Cat. W. Scot. Foss.,” p. 61. 
Teeth small, strong, *4 inch in lateral diameter, *4 inch in height ; height 
divided equally between the base and the crown. Crown oval in outline, laterally 
