﻿134 ICHTHYODORULITES. 



Stichacanthus tortworthensis, Davis. 



1883. Stichaca}it/ms torticorthensis. J. W. Davis, Trans. Roy. Dublin 

 Soc. [2] vol. i. p. 532, pi. lxv. fig. 2. 



Type. Earl of Ducie, Tortworth Court. 



Form. $• Loc. Carboniferous Limestone : Gloucestershire and 

 Shropshire. 



42234. Portions of a spine of similar proportions to the type speci- 



men ; Oreton, Shropshire. The concavely-arehed margin 

 is rounded, the opposite truncated by a flat area, which 

 becomes channelled distally. Upon one edge of the flat- 

 tened area there is a series of relatively large denticles ; 

 and on the sides near the base the longitudinal ridges 

 connecting the tubercles disappear. Baugh Coll. 



42234 a. Basal portion of a similar broad spine ; Oreton. 



Baugh Coll. 



42236. A much more slender spine of a similar type ; Oreton. 



Baugh Coll. 



The following specimens only differ from the typical Stichacanthus 

 in the fact that the superficial tubercles are not connected even by 

 faint ridges : — 



42235. An imperfect small broad spine ; Oreton. Baugh Coll. 



14195. Portion of a small spine, perhaps narrower ; Oreton. 



Purchased, 1868. 



42245. Proximal portion of a small spine showing a large base of 

 insertion; Oreton. Baugh Coll. 



The following species is also doubtfully placed here : — 



Stichacanthus (?) humilis, L. G. de Koninck, Paune Calc. Carb. 

 Belg. pt. i. (1878), p. 72, pi. vii. fig. 6. — Lower Carboni- 

 ferous Limestone ; Soignies, Belgium. [Eoyal Museum Nat. 

 Hist., Brussels.] 



