﻿133 ICHTHY0D0RULITE3. 



P. 2878. Elongated bilaterally-symmetrical plate pointed at one 

 extremity, figured, loc. cit. pi. lxii. fig. 3 ("jugular plate ? 

 or sphenoid bone "). 



P. 2886. Much- broken plate, figured, loc. cit. pi. lxii. fig. 12 (" jugular 

 plate ? "). 



P. 2881. Unsymmetrical plate, figured, loc. cit. pi. lxii. fig. 6 ("cheek- 

 plate or operculum "). 



P. 2879. Nearly similar smaller plate, figured, loc. cit. pi. lxii. fig. 4 

 (" upper jaw ? "). 



P. 2882. Elongated unsymmetrical pointed plate, figured, loc. cit. 

 pi. lxii. fig. 7 (" lower jaw "). 



P. 2880, P. 2883-5. Irregularly shaped plates, figured, loc. cit. 

 pi. lxii. figs. 5, 8, 10, 11 ("head-bones"). 



P. 2888, P. 2901. Imperfect small dermal plates or spines, mostly 

 triangular. 



Oracanthus pustuloses, Agassiz. 



3837. 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. 6f 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, fy Loc. Lower Carboniferous (Keokuk Limestone) : Iowa 

 and Illinois, U.S.A. 



P. 2900. Imperfect specimen, probably of this species; "Warsaw, 

 Illinois. Ennishillen Coll. 



