142 
1CHTHY0D0RTTLITES. 
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. Enniskillen Coll. 
P. 6234. Fragment labelled by Agassiz ; Leeds. Egerton Coll . 
P. 4178. Much broken spine ; Ruabon, Denbighshire. 
Enniskillen Coll. 
Fig. 10. 
Fin-spine of Gyraccmthus 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. Enniskillen 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. Enniskillen 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. Barkas . 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. 
