COCHLIODONIID^. 
203 
(i.) Rounded variety (? upper jaw). 
P. 2457-8, P. 2460. Three dental plates, deseribed and figured by 
J. W. Davis, loc. eit. 1883, as P.jonesH ; Armagh. 
EnnisTcillen Coll. 
P. 2456. Thirty similar plates ; Armagh. EnnisMllen Coll. 
P. 1412. Ton examples ; Armagh. Eyerton Coll. 
P. 2456 a. Impression of a dental plate, of which only the anterior 
part is preserved; Armagh. This is the type specimen of 
P. transversus, Agassiz MS., and bears the following 
labels. “ This specimen convinces me that Mens. Agassiz’s 
species Pcecilodtis transversus is a bad one. I consider it 
to he a divided tooth of Poecilodus Jonesii. [Signed] 
Enniskillen, Florence Court, Feb. 4th, 1858.’’—“ I was 
certainly mistaken in distinguishing a Paicilodus trans- 
versus as distinct from P. Jonesii. [Signed] Agass.” 
Enniskillen Coll. 
28738. Seven dental plates ; Armagh. Purchased, 1853. 
26039, 28741. Six fragments of dental plates similar to those from 
Yorkshire described as P. corrugatus, Davis ; Armagh. 
Purchased, 1851, 1853. 
46038. Typical dental plate ; Boith, Ayrshire. 
Presented hy Robert Craig, Esq., 1874. 
P. 4902. Two fragments; Yoredale Bocks, Wen sloy dale, Yorkshire. 
Home Coll. 
49615. Similar fragment ; Kichmond, Yorkshire. Purchased, 1878. 
46819. Imperfect dental plate ; Derbyshire. GiUertson Coll. 
P. 5356. Seven fragments of dental plates, one figured (I’l. I. fig. 25); 
Ticknall, near Melbourne, S. Derbyshire. Wilson Coll. 
P. 5355 a. Small imperfect example ; Ticknall. Wilson Coll. 
(ii.) Angulated variety (? lower jaw). 
P. 2461. Dental plate described and figured hy J. W. Davis, loc. cit. 
1883, as P. obliquus ; Armagh. Enniskillen Coll. 
P. 2462. Thirty dental plates, some much abraded ; Armagh. 
Enniskillen Coll. 
