134 
ICHTHYODORULITES. 
Stichacanthus tortworthensis, Davis. 
1883. StichacantJius tortworthensis. J. W. Davis, Trans. Roy. Dublin 
Soc. [2] vol. i. p. 532, pi. lxv. fig. 2. 
Type. Earl of Ducie, Tortworth Court. 
Form. Sf Loc. Carboniferous Limestone: Gloucestershire and 
Shropshire. 
42234. Portions of a spine of similar proportions to the type speci¬ 
men ; Oreton, Shropshire. The concavely-arched margin 
is rounded, the opposite truncated by a flat area, which 
becomes channelled distall} 7 . 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 :•— 
StichacantJius (?) humilis , L. G. de Koninck, Eaune Calc. Carb, 
Belg. pt, i. (1878), p. 72, pi. vii. fig. 6.—Lower Carboni¬ 
ferous Limestone ; Soignies, Belgium. [Royal Museum Nat. 
Hist., Brussels.] 
