13S 
ICHTHT0D0ET7LITES. 
P. 2878. Elongated bilaterally-symmetrical plate pointed at one 
extremity, figured, loc. cit. pi. Ixii. fig. 3 (“jugular plate ? 
or sphenoid bone ”). 
P. 2886. Much-broken plate, figured, loc. cit. pi. Ixii. fig. 12 (“ jugular 
plate ? ”). 
P. 2881. Fnsymmetricalplate, figured, loc. cit. pi. Ixii. fig. 6 (“cheek- 
plate or operculum ”). 
P. 2879. Nearly similar smaller plate, figured, loc. cit. pi. Ixii. fig. 4 
(“ upper jaw ? ”). 
P. 2882. Elongated unsymmetrical pointed plate, figured, loc. cit. 
pi. Ixii. fig. 7 (“ lower jaw ”). 
P. 2880, P. 2883-5. Irregularly shaped plates, figured, loc. cit. 
pi. Ixii. figs. 5, 8, 10, 11 (“head-bones”). 
P. 2888, P. 2901. Imperfect small dermal plates or spines, mostly 
triangular. 
Oracanthus pustulosus, Agassiz. 
]837. Oracanthus pustulosus, L. Agassiz, Poiss. Foss. vol. iii. p. 15, 
pi. ii. figs. 3, 4. 
1883. Phoder acanthus grandis, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i. p. 534, pi. lxv. fig. 1. [British Museum.] 
Type. Bristol Museum. 
Form. Loc. Lower Carboniferous Limestone: Bristol, Glouces¬ 
tershire. 
P. 4716. Type specimen of Phoderacanthus grandis , Davis, described 
and figured, loc. cit. Presented by the Earl of Ducie , 1884. 
Oracanthus pnigeus, Newberry & Worthen. 
1866. Oracanthus pnigeus, Newberry & Worthen, Pal. Illinois, vol. ii. 
p. 117, pi. xii. fig. 3. 
1875. Pnigeacanthus deltoides, St. John & Worthen, Pal. Illinois, 
vol. vi. p. 480. 
1883. Pnigeacanthus pnigeus , St. John & Worthen, op. cit. vol. vii. 
p. 260. 
Form. Loc. Lower Carboniferous (Keokuk Limestone): Iowa 
and Illinois, I7.S.A. 
P. 2900. Imperfect specimen, probably of this species; Warsaw, 
Illinois. Enniskillen Coll. 
