WELLBURN : FISH FAUNA OF LOWER CARBONIFEROUS ROCKS. 385 
Genus Pcecilodus M'Coy (emend. A. S. Woodward), Brit. 
Pal. Foss., 1855, p. 638. 
P. Jonesii (M'Coy). 
Syn.: P. corrugatus Davis, I.e., p. 625. 
Dental Plates : York and Brit. Mus. 
Form and Loc: Carbonif. limestones, Wensleydale and 
Richmond. 
Genus Cochliodus Agassiz, Pois. Foss., vol. iii., 1838, p. 113. 
C. contortus Agassiz. 
Dental Plates : York and Brit. Mus. 
Form and Loc.: Carbonif. limestones, Wensleydale. 
Genus Deltoptychius Agassiz (Morris and Roberts, ex Agassiz 
MS.), Quart. Journ. Geol. Soc, vol. xviii., 1862, p. 100 
(name only). 
D. acutus (M'Coy) Morris and Roberts, I.e. (name only). 
Syn.: D. plicatus Davis, I.e., p. 628. 
Small Dental Plates : York and Brit. Mus. 
Form and Loc: Carbonif. limestones, Wensleydale. 
Genus Diplacodus Davis, I.e., p. 632. 
D. bulboides Davis, I.e., p. 633. 
Dental Plate : York and Brit. Mus., Author's col. 
Form and Loc: Carbonif. limestones, Wensleydale. 
Genus Cyrtonodus Davis, I.e., 631. 
C hornei A. S. Woodward, Cat. Foss. Fishes, Brit. Mas., 
pt. i., p. 631. 
Teeth : Brit. Mus. 
Form and Loc: Carbonif. limestones, Wensleydale and 
Richmond. 
C. gibhosus Davis, I.e., p. 631. 
Teeth : York. Mus. 
Form and Loc: Carbonif. limestones, Wensleydale. 
Family Cestraciontid^. 
Genus Orodus Agassiz, Pois. Foss., vol. iii., 1838, p. 96. 
0. moniliformis Davis. 
