﻿ICRTHYODORULITES. 133 



vol. vi. p. 468), are perhaps of the same type as Physonemus. Two 

 species are recognized : — B. baculiformis, St. John & Worthen 

 (ibid. p. 469, pi. xxi. figs. 4-8), from the Keokuk Limestone of Mis- 

 souri, Iowa, and probably Illinois ; and B. stellatus, St. John & 

 Worthen (ibid. p. 470, pi. xxi. figs. 1-3), previously named Drepa- 

 nacanthus? stellatus, Newberry & Worthen (Pal. Illinois, vol. ii. 

 1866, p. 125, pi. xii. fig. 7), from the Keokuk Limestone of Illinois. 

 A third spine is also doubtfully placed here, namely, B. ? necis, St. 

 John & Worthen (op. cit. vol. vii. p. 253, pi. xxv. fig. 4), from the 

 Keokuk Limestone of Iowa ; and it is suggested (op. cit. vol. vi. 

 p. 468) that the so-called Myriacanihus semigranulatus, H. Roman- 

 owsky (Bull. Soc. Imp. Nat. Moscou, 1864, pt. ii. p. 167, pi. iv. 

 fig. 34), may be of the same generic type. 



Genus STICHACANTHUS, Koninck. 

 [Faune Calc. Carb. Belg. pt. i. 1878, p. 70.] 



Spines much laterally compressed, straight or slightly arched, 

 broad and triangular, or narrow and elongated ; sides of exserted 

 portion ornamented with longitudinal series of rounded tubercles 

 placed upon low ridges, except towards the base, where the ridges 

 disappear. 



Stichacanthus coemansi, Koninck. 



1878. Stichacanthus coemansi, L. G. de Koninck, Faune Calc. Carb. 

 Belg. pt. i. p. 71, pi. vii. figs. 4, 5. 



Type. Boyal Museum of Natural History, Brussels. 

 The type species. 



Form. 6f Loo. Lower Carboniferous Limestone : Belgium, Shrop- 

 shire, and Gloucestershire. 



38197. Portion of spine noticed by de Koninck, op. cit. p. 71 ; 

 Oreton, Shropshire. Purchased, 1861. 



P. 229-30.' A much-abraded specimen, and an imperfect spine, with 

 finer ornament, doubtfully of this species ; Oreton. 



Weaver-Jones Coll. 



42240. Terminal portion of spine similar to No. P. 230 ; Oueton. 



Baugh ColL 



