COCHLIODONTID-®. 
219 
Agassiz Helodtis gihbenilus, Agassiz Helodus rrassus, Davis , 
and Helodus e.vpansus, Davis 
P. 2918. Typo specimen of Chomatodm chictus, Aga.ssiz,^gnTcd tom. 
cit. pi. XV. fig. 13'; Lower Carboniferous Limestone, 
Bristol. Etiniskillen Coll. 
20573, 20575, 28537, 34974. Fifteen nearly similar teeth, with a 
more prominent coronal ridge ; Bristol. Purchased. 
32739-40. Two teeth named Uelodus iurgidus ; Bristol. 
Presented hy S. P. Pratt, Esy., 1857 . 
44853. Similar tooth ; Bristol. 
Presented hy Benjamin Bright, Esep, 1873. 
P. 1426, P. 1466. Ten similar teeth ; Bri.stol. Egerton Coll. 
50009. Detached tooth ; Bristol. Trevelyan Bequest, 1879. 
P. 2616, P. 2658. Twelve similar teeth ; Bristol. Ennislillen Coll. 
36467, 41189. Four teeth ; Orcton, Shropshire. Purchased, 1868. 
42217. Forty teeth ; Oreton. Baugh Coll. 
P. 1427. Similar tooth ; Settle, Yorkshire. Egerton Coll. 
P. 2617. Similar tooth; Upper Carboniferous Limestone, Eichmond, 
Yorkshire. Enniskillen Coll. 
P. 217. Six similar teeth, two with a sharp longitudinal ridge, 
approaching “ Uelodus expansus ” ; Oreton. 
Weaver-Jones Coll. 
35483. Abraded tooth ; Upper Carboniferous Limestone, Eichmond, 
Yorkshire. Purchased, 1860. 
P. 1474. Tooth of the same kind ; Lower Carboniferous Limestone, 
Hook Point, \V oxford, Ireland. Egerton Coll. 
P. 2618. Two teeth ; Hook Point. Enniskillen Coll. 
' Poisa. Foaa. toI. iii. p. 106, pi. xv. figs. 1-12. Also F. M'Coy, op. cit. 
p. 023 ; L. G. de Koninck, op. cit. pt. i. p. 39, pi. iv. figs. 13, 14, pi. vi. fig. 21. 
^ Tom. cit. p. 106, pi. xii. figs. 1,2; (?) also II. Trautschold, Nouv. Mem. 
Soo. Imp. Nat. Moscou, vol. xiii. (1874), p. 269, pi. xxvi. fig. 9. Lophodus 
gibbcrulus, J. W. Davis, Trans. Eoy. Dublin Soo. [2] vol. i. (1883), p. 405, 
pi. li. fig. 19 ; (?) also L. G. de Koninck, op. cit. pt. i. p. 34, pi. iv. fig. 7. 
^ J.W. Davis, loc. cit. p. 453, pi. lix. figs. 1, 2. Including duymatodns 
cinctus, Ag., in part. 
* J. W. Davis, loc. cit. p. 457, pi. lix. fig. U). Including Chamatodus linearis, 
Ag., in part. 
