﻿ICHTHTODOEULITES. 143 



The following specimens exhibit a more tuberculated ornament 

 than those enumerated above, and are thus typical examples of the 

 variety tuberculatus : — 



P. 243. Very small imperfect spine ; Longton, Staffordshire. 



Weaver-Jones Coll. 



P. 5529. Small spine ; probably from the Black-shale Coal, Tibshelf 

 Colliery, near Alfreton, Derbyshire. 



Presented by Edward Wilson, Esq., 1888. 



P. 3143-4. Eight and left spines of large size, much worn at the 

 apex ; Low Main Seam, JNewsham, near ISFewcastle-on- 

 Tyne. Ennishillen Coll. 



P. 4176-7. A still larger specimen, 0'16 in circumference at the 

 base ; also an imperfectly preserved smaller spine ; News- 

 ham. Ennishillen Coll. 



36149. Spine 0*335 in length, with worn apex ; Airdrie, Lanark- 

 shire. Presented by Mr. Hair, 1857. 



21975 a. A comparatively slender spine, and a much worn larger 

 spine ; Carluke, Lanarkshire. Purchased, 1848. 



21975. Two small spines ; Carluke. Purchased, 1848. 



P. 3139-40, P. 3142, P. 3145. Five large spines ; Dalkeith. 



Ennishillen Coll. 



P. 6235. Fragment of spine ; Dalkeith. 



P. 4181. Basal portion of spine; Queen's Co., Ireland. 



Ennishillen Coll. 



The following examples of the broad triangular dermal spines of 

 Gyracanihus formosus are also contained in the Collection • — 



P. 2264. Small specimen measuring about 0*14 in height and 0-09 

 across the base • Knowles Shale, Fenton, K. Staffordshire. 



Egerton Coll. 



P. 3149. Larger specimen ; Longton, N*. Staffordshire. 



Ennishillen Coll. 



P. 3150. Three specimens, apparently exhibiting a few tubercles, 

 either in the form of a superficial ornament, or originally 

 imbedded in an investing integument ; Low Main Seam, 

 Newsham, near jSTewcastle-on-Tyne. Ennishillen Coll. 



