CLADODONTIDiE. 
21 
Cladodus grandis, Newbe^ 7 & Worthen. 
1866. Cladodus qrandis, Newberry & Wortken, Pal. Illinois, vol. ii. 
p. 29, pi. i. fig. 15. 
Type. Detached tooth. 
Teeth very large and robust. Principal cone broad, moderately 
compressed, with sharp lateral edges ; outermost lateral cones large, 
slender, diverging, others relatively small, 4-7 in number on each 
side. Coronal surface marked by numerous delicate vertical striae. 
Form. Sf Log. Lower Carboniferous (Chester Limestone) : Illinois, 
TJ.S.A. 
P. 2948. Two broken principal dental cones; Pope Co., Illinois. 
Enniskillen Coll. 
Cladodus robustus, Newberry & Worthen. 
1866. Cladodus robustus , Newberry & Wortken, Pal. Illinois, vol. ii. 
p. 20, pi. i. fig. 1. 
1866. Cladodus micropus, Newberry & Worthen, tom. cit, p. 21, pi. i. 
fig. 2. 
1866. Cladodus angulatus , Newberry & Worthen, tom. cit. p. 24, pi. i. 
figs. 7, 8. 
1866. Cladodus turritus , Newberry & Worthen, tom cit. p. 28. pi. i. 
fig. 14. 
Type. Detached tooth. 
Crown of tooth relatively high, base small. Principal cone elon¬ 
gate, sigmoidal, compressed, with sharp lateral edges, and delicately 
striated; lateral cones very small, not more than two on either side. 
Messrs. Newberry and Worthen have already suggested the possi¬ 
bility of the four forms of teeth, here assigned to C. robustus , per¬ 
taining to different parts of the mouth of one individual. It is 
inconvenient to separate them specifically by characters so slight as 
those referred to in the several diagnoses. 
Form, Log. Lower Carboniferous (Keokuk Limestone) : Illinois, 
U.S.A. 
P. 2950. Broken fragment of principal cone ; Warsaw, Illinois. 
Enniskillen Coll. 
P. 2946. Tooth of the form of “ C. micropus Warsaw, Illinois. 
EnniskiUen Coll. 
P. 2947. Similar, more perfect tooth ; Warsaw, Illinois. 
Enniskillen Coll. 
P. 2941. Fifteen fragmentary teeth, probably of this species : 
Warsaw, Illinois. Enniskillm Coll. 
