22 
ICHTHTOTOMI. 
Cladodus spinosus, Newberry & Worthen. 
1866. Cladodm spinosus, Newberry & Worthen, Pal. Illinois, vol. ii. 
p. 22, pi. i. fig. 3. 
Tiji>e. Detached tooth. 
Principal cone of tooth long and slender, circular in section below, 
compressed near the apex, delicately striated; lateral cones 6-7 
on either side, the outer pair much the largest. Anterior base-line 
of crown beset with numerous minute pointed prominences. 
Form. ^ Loc. Lower Carboniferous (St. Louis Limestone) : Mis- 
souri, U.8.A. 
P. 2949. Tooth showing posterior aspect ; St. Louis, Missouri. 
Enniskillen Coll. 
Cladodus springeri, St. John & Worthen. 
1876. Cladodus springeri, St. John & Worthen, Pal. Illinois, vol. vi. 
p. 259, pi. ii. figs. 1-13. 
1878. Cladodus springeri, L.G. deKoninck,Faune Calc. Carb. Belg.(Ann. 
Mus. Koy. d’Hist. Nat. Belg.) vol. ii. pt. i. p. 28, pi. iii. figs. 6-6. 
Type. Detached teeth. 
Principal cone of tooth long and slender, slightly compressed, with 
sharp lateral edges throughout its length. Lateral denticles long 
and slender, not more than four in number on each side, and 
alternating in size ; the outer pair generally the largest and di- 
verging. The anterior base-line of the crown is often beset with 
numerous minute pointed prominences ; the principal cone is marked 
nearly to the apex by few, irregular, delicate sharp strice, the 
lateral cones also with the bolder striae extending to the apex. 
L. G. de Koninck ’ has suggested that the teeth named C. alter- 
natus, C. succinctus, and C. wachsmuthi, not improbably belong to 
this species — a suggestion which the respective figures and descrip- 
tions appear to the present writer to render most justifiable. It is 
also not unlikely that some of the Russian teeth referred by Traut- 
schold “ to C. lamnoides truly pertain to C. springeri. The original 
of Trautschold’s fig. 3 6, pi. xxviii. loc. eit., is evidently much 
abraded, and this fact may account for some of the differences to be 
observed. 
Form. ^ Loc. Lower Carboniferous (Kinderhook Formation) : Iowa, 
U.S.A. Carboniferous Limestone : Tournai, Belgium ; Mjatsch- 
kowa, Russia. 
’ Op. dt. pt. i. p. 29. 
> Nouv. M^m. Acad. St. P^tersb. vol. liii. 1874, p. 286, pi. xirin. figs. Za-e. 
