WELLBURN : FISH FAUNA OF LOWER CARBONIFEROUS ROCKS. 383 
P. benniei (R. Etheridge, jun.), Traquair, I.e., p. 101. 
Syn.: Petalorynchiis (?) benniei Etheridge, jun., Geol. Mag., 
vol. ii., p. 243, 1875. 
Tooth : Brit. Mus. 
Form and Loc.: Carbonif. limestones, Richmond. 
Family Psamodontid^. 
Genus Copodus J. W. Davis (ex Agassiz MS.), Trans. Roy. 
Dub. Soc., vol. i., p. 464. 
Syn.: Lahodus Davis, I.e., p. 468. 
C. prototypus (Davis). A. S. Woodward, I.e., p. 97. 
Tooth : York Mus. 
Form and Loc.: Carbonif. limestones, Wensleydale. 
C. cornuatus J. Morris and J. E. Roberts (ex Agassiz MS.), 
Quart. Jour. Geol. Soc, vol. xviii., p. 100. 
Teeth : York and Brit. Mus. 
Form and Loc: Carbonif. limestones, Wensleydale and 
Richmond. 
Genus Psamodus Agassiz Pois Foss., vol. iii. (1838), p. 110. 
P. rugosus Agassiz, I.e., p. 111. 
Teeth : York Mus., Author's col. 
Form and Loc: Carbonif. limestones, Wensleydale. 
P. expansus (Davis), A. S. Woodward, I.e., p. 105. 
Syn.: Astrahodus expansus Davis, Quart. Jour. Geol. Soc, 
vol. xl., p. 629 (1884). 
Teeth : York Mus. 
Form and Loc: Carbonif. limestones, Wensleydale. 
Family Cochliodontid.?:. 
Genus Helodus Agassiz, I.e., p. 104. 
H. reticulatus ? Davis, Trans. Roy. Dub. Soc, vol. i., p. 407. 
Syn.: Lophodus reticulatus Davis, I.e., p. 407. 
H. angularis Davis, Quart. Jour. Geol. Soc, vol. xl., p. 628. 
Syn.. Lophodus angularis Davis, I.e., p. 628. 
H. conicus Davis, I.e., p. 627. 
Syn.: Lophodus conicus Davis, I.e., p. 627. 
