- •» ' 
. 
rLEXJEACANIHIDJS. y 
P. 3177. Small, much-abraded spine ; Bassy-mine Ironstone, Long- 
ton, N. Staffordshire. Enniskillen Coll, 
P. 244, P. 5447. Fragments of large spines; New Ironstone, Fen¬ 
ton, N, Staffordshire. Purchased , 1880, 1886. 
The following species have also been founded upon detached 
spines, but there are no examples in the Collection :— 
Pleuraccinthus alatus, J. W. Davis, Quart. Journ. Geol. Soc. 
vol. xxxvi. (1880), p. 329, pi. xii. fig. 4.—Middle Coal- 
Measures ; Tingley, Yorkshire. 
Pleuraccinthus alternidentatus , J. W. Davis, tom. cit. p. 328, pi. xii. 
fig. 3.—Coal-Measures ; near Leeds, Yorkshire. 
Pleuracanthus biserialis, J. S. Newberry, Proc. Acad. Nat. Sci, 
Philad. 1856, p. 100.—Coal-Measures; Ohio. 
Pleuracanthus bohemicus : Orthacanthus bohenncus, A. Fritsch, 
Sitzungsb. konigl. bohm. Gesell. Miss. 1877, p. 47 ; 
loc. cit. 1879, p. 189 ; K. A. Zittel, Handb. Pakeont, 
vol. iii. pt. i. (1887), p. 90, woodc. fig. 101.—Lower 
Permian; Bohemia. 
Pleuracanthus denticulatus, J. W. Davis, tom. cit. p. 334, pi. xii. 
fig. 7.—Lower Coal-Measures ; near Halifax, Yorkshire. 
Pleuracanthus clilatatus, J. S. Newberry, Proc. Acad. Nat. Sci. 
Philad. 1856, p. 100.—Coal-Measures ; Ohio. 
Pleuracanthus elegans, It. H. Traquair, Geol. Mag. [2] vol. viii. 
(1881),p.36.—L. Carboniferous; Borough Lee, Edinburgh, 
Pleuracanthus frossarcli, A. Gaudry, Nouv. Archiv. Mus. vol. iii. 
(1867), p. 39, pi. iii. fig. 5.—Middle Permian; Autun,^\ p ^'^ i 
Saone-et-Loire, France. e & 7 "> w ^ ** Xrv> ' n 
Pleuracanthus gaudryi, C. Brongniartq Comptes Pend., vol. cvi. rP./^n 
(1888), p. 1240.—Coal-Measures; Commentry, Allier. ePf. t% c lo r pio 
Pleuracanthus gracillimus , P. H. Traquair, Geol. Mag. [2] vol. ix. 
(188^), p. 540.—Lower Carboniferous; Borough Lee, near 
Edinburgh. 
Pleuracanthus horriclulus, P. H. Traquair, tom. cit. p. 541.—Lower 
Carboniferous ; Borough Lee, near Edinburgh. 
Pleuracanthus lavis : Compsacanthus la vis, J. S. Newberry, Proc. 
Acad. Philad. 1856, p. 100, and Pep. Geol. Surv. Ohio, 
vol. i. pt. ii. (1873), p. 332, pi. xl. fig. 5 ; (?) Orthacanthus 
gracilis, id. op. cit. vol. ii. pt. ii. p. 56, pi. lix. fig. 7.— ' 
Coal-Measures; Ohio. 
Pleuracanthus quadriseriatus : Orthacanthus quadriseriatus, E. D, 
Cope, Proc. Amer. Phil. Soc. 1877, p. 192.—Permian; 
Eastern Illinois. 
