COCHLIODONTIDa;. 
221 
P. 2615. Throo teeth of the form named Helodm anffidatus, New- 
berry & Worthen'; Burlington Limestone, Quincy, Illi- 
nois. Ennishillen Coll. 
P. 2603. Tooth of the form named Jlelodus sulcatiis, Newberry & 
Worthen “ ; Keokuk Limestone, near Warsaw, Illinois. 
Enniskillen Coll. 
II. Large laterally compressed teeth, with a median eminence. 
P. 2633-4. Two typo specimens of Ilelodus tenuis, J. W. Davis, 
Trans. Koy. Dublin Soc. [2] vol. i. p. 454, pi. lix. figs. 3, 
4 ; Armagh. Enniskillen Coll. 
P. 2635. About forty similar teeth, only differing from those of 
Ilelodus entssus, Davis, in their extremo lateral com- 
pression ; Armagh. Enniskillen Coll. 
P. 2608-9. Two teeth, forming the ty[)o specimens of Ilelodus 
elavatus, J. W. Davis, Trans. Hoy. Dublin Soc. [2] vol. i. 
(1883), p. 455, pi. lix. figs. 5, 6 ; Armagh. 
Enniskillen Cull. 
111. Small conical teeth. 
P. 2636. Type specimen of Ilelodus richmondiensis, J. W. Davis, 
Trans Hoy. Dublin Soc. [2j vol. i. p. 450, pi. lix. fig. 8 ; 
Upper Carboniferous Limestone, Hichmond, Yorksliiro. 
Enniskillen Coll. 
P. 4900. Similar, but slightly larger tooth ; Yoredalc Hooks, Wens- 
leydale, Yorkshire. llome Coll. 
P. 2606. Type specimen of Ilelodus triangularis,!. W. Davis, Trans. 
Hoy. Dublin Soc. [2] vol. i. p. 450, pi. lix. fig. 9 ; Lower 
Carboniferous Limestone, Armagh. Enniskillen Coll. 
P. 2612. Similar tooth ; Armagh. Enniskillen CoU. 
P. 4191 a. Smaller tooth, with crimped margin ; Armagh. 
Enniskillen Coll. 
P. 2607. Type specimen of Ilelodus acutus, J. W. Davis, Trans. Hoy. 
Dublin Soc. [2] vol. i. p. 455, pi. lix. fig. 7 ; Armagh. 
Enniskillen Coll. 
' Pal. Illinois, vol. ii. (1866), p. 83, pi. v. figs. 9-15. 
“ Tom. cit. pi. V. fig. 16. 
