﻿100 ICHTHYODORUL1TRS. 



Ctenacanthus denticulatus, M'Coy. 

 L848. Ltenacanthus denticulatus, F. M'Coy, Ann. Mag. Nat. Hist. [2] 



vol. ii. p. 116. 

 1855. Ctenacanthus denticulatus, F. M'Coy, Brit. Paheoz. Foss. p. 625 



pi. iii. k. fig-. 16. 

 1883. Ctenacanthus denticulatus, J. W. Davis, Trans. Roy. Dublin Soc. 



[2] vol. i. p. 338, pi. xliv. fig. 4. 



Type. Woodwardian Museum, Cambridge. 



Form. § Loc. Lower Carboniferous Limestone : Armagh and 

 Shropshire. Lower Carboniferous : Monaduff, Drumlish, N. Ireland. 



41193-94. Two imperfect small spines ; Oreton, Shropshire. 



Purchased, 1868. 



42237. Fragment ; Oreton. Baugh Coll. 



Ctenacanthus brevis, Agassiz. 



1837. Ctenacanthus brevis, L. Agassiz, Poiss. Foss. vol. iii. p. 11, pi. ii. 



fig. a. 



1883. Ctenacanthus brevis, J. W. Davis, Trans. Roy. Dublin Soc. [2] 



vol. i. p. 337, pi. xliii. fig. 3. 

 1883. Ctenacanthus limaformis, J. W. Davis, ibid. p. 339, pi. xliv. fig. 5. 



[British Museum.] 



Type. Bristol Museum. 



Form. Sf Log. Lower Carboniferous Limestone : Bristol. 



22665. Two partially broken spines, naturally associated, the hinder 

 being smaller and narrower than the foremost. 



Purchased, 1848. 



34982. Imperfect example. Purchased, 1860. 



P. 2226. Spine, and fragment labelled by Agassiz. Egerton Coll. 



P. 3111-2. Spine figured and described by J. W. Davis, torn. cit. 

 p. 337, pi. xliii. fig. 3 ; also a fragment labelled by 

 Agassiz. Enniskillen Coll. 



P. 6231. Fragmentary specimen. Purchased. 



P. 2535. Type specimen of C. limaformis, J. W. Davis, loc. cit. 

 p. 339, pi. xliv. fig. 5. This is a much brokeu spine, and 

 so far as its characters*are distinguishable cannot be sepa- 

 rated from C. brevis; the published figure is misleading. 



Enniskillen Coll. 





