﻿11 2 ICHTTIYODCmiTLTTES. 



Cosmacanthus marginalis, Davis. 



L888. Cosmacanthus marginalis, J. W. Davis, Trans. Roy. Dublin Soc. 

 [2] vol. i. p. ooo, pi. xlviii. fig. 3. 



Type. British Museum. 



Form, 6f Loe. Lower Carboniferous Limestone: Armagh, Ireland. 



P. 2894. Type specimen. Ennishillen Coll. 



P. 2894 a. More complete but much abraded and broken spine. 



Ennishillen Coll. 



Cosmacanthus carinatus, Davis. 



1883. Cosmacanthus carinatus, J. W. Davis, Trans. Roy. Dublin Soc. 

 [2] vol. i. p. 356, pi. xlviii. fig. 4. 



Type. British Museum. 



Form. Sf Loc. Lower Carboniferous Limestone : Armagh. 



P. 2893. Type specimen. Ennishillen Coll. 



Cosmacanthus priscus (M'Coy). 



1843. Leptacanthus priscus, L. Agassiz, Poiss. Foss. vol. iii. p. 176 



(name only). 

 1848. Nemacanthus priscus, F. M'Coy, Ann. Mag. Nat. Hist. [2] vol. ii. 



p. 120. 

 1883. Cosmacanthus priscus, J. W. Davis, Trans. Roy. Dublin Soc. [2] 



vol. i. p. 358, pi. xlviii. figs. 1, 2. 



Type. Geological Society of London. 



Form. 4" Loc. Lower Carboniferous Limestone : Armagh. 



P. 2237. Fragment of spine. Eyerton Coll. 



The following species have also been described, but there are no 

 examples in the Collection : — 



Cosmacanthus bidlatus : Geisacanihus bullatus, St. John & Worthen, 

 Pal. Illinois, vol. vi. (1875), p. 441, pi. xvii. figs. 3, 4.— 

 Lower Chester Limestone ; Illinois. 



Cosmacanthus carbonarius, F. M'Coy, Ann. Mag. Nat. Hist. [2] 

 vol. ii. (1848), p. 119 ; J. W. Davis, Trans. Roy. Dublin 

 Soc. [2] vol. i. (1883), p. 357. — Lower Carboniferous 

 Limestone; Armagh. 



Cosmacanthus malcolmsoni, L. Agassiz, Poiss. Foss. Yieux Gres 

 Rouge (1845), p. 121, pi. xxxiii. fig. 28.— Upper Old Red 

 Sandstone ; Scat Craig, Elgin, Scotland. [The type 

 species ; collection of James Powrie, Esq., Reswallie.] 



