﻿142 1CHTHT0D0RULITES. 



P. 2235. Imperfect spine of moderate size, showing part of a 

 posterior series of small denticles ; Lower Coal-Measures, 

 Lowmoor, Yorkshire. Egerton Coll. 



P. 4179. Fragment; Lowmoor. EnnisJc Men Coll. 



P. 6234. Fragment labelled by Agassiz ; Leeds. Egerton Coll. 



P. 4178. Much broken spine ; Ruabon, Denbighshire. 



EnnisJcillen Coll. 



Fig. 10. 



Fin-spine of Gyracanthus formosus, Ag. Coal-Measures ; Dalkeith. 



36174. Abraded spine of moderate size ; Dalkeith, near Edinburgh. 



Purchased^ 1861. 



P. 2219. Two spines of medium size, and three large specimens; 

 Dalkeith. Egerton Coll. 



P. 3148. Two similar spines ; Dalkeith. EnnisJcillen Coll. 



P. 2234. Nearly complete spine 0*405 in length ; Dalkeith. 



Egerton Coll. 



P. 3142 a. Base of a very large spine, and an imperfect spine of 

 moderate size, said to have been found associated ; Car- 

 luke, Lanarkshire. EnnisJcillen Coll. 



P. 3141, P. 3147. Spine 0*355 in length, and one of moderate size; 

 Carluke. Enniskillen Coll. 



P. 2290. Fragment of spine ; Govan, near Glasgow. 



„ Presented by George Griffiths, Esq., 1882. 



P. 4180. Imperfect basal portion of large spine, probably of this 

 species ; Castlecomer, Kilkenny, Ireland. Enniskillen Coll. 



41635. Two slabs of shale with dermal tubercles, probably of this 

 species ; Low Main Seam, Newsham, near Newcastle-on- 

 Tyne. Presented by T. P. BarJcas, Esq., 1869. 



P. 6239. Microscopical section of dermal tubercle, probably of this 

 species, the type specimen of Mitrodus quadricornis, 

 Owen; Newsham. 



Presented by Sir Richard Owen, K.C.B., 1890. 



