ICHTHYODORULITES. 
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 Brepa- 
nacanthus '? stellatus, Newberry & Worthen (Pal. Ilfinois, 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 Myriacanthus semigranulatus , H. Roman- 
owsky (Pull. Soc. Imp. Nat. Moscou, 1864, pt. ii. p. 167, pi. iv. 
fig. 34), may be of the same generic type. 
Genus STICHACANTHUS, Koninck. 
[Paune Calc. Garb. 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 cesmansi, Koninck. 
1878. Stichaccmthus ccemansi, L. G. de Koninck, Faune Calc. Carb, 
Belg. pt. i. p. 71, pi. vii. figs. 4, 5. 
Type. Royal Museum of Natural History, Brussels. 
The type species. 
Form. Sf Loc. Lower Carboniferous Limestone: Belgium, Shrop¬ 
shire, and Gloucestershire. 
36197. 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. r J lerminal portion of spine similar to Ao. P. 230 ; Oreton. 
Baugh ColP 
