A HISTORY OF HEREFORDSHIRE have not yet been specifically determined." Finally, another genus of fringe- finned ganoids, representing a family (Onychodontidae) by itself, and known otherwise only by two or three American species, and by one from Spitz- bergen, occurs in the Lower Old Red Sandstone of the county. Of the two known specimens of the English species, Onychodus anglicus^^'^ obtained at Ledbury, one is preserved in the British Museum, and the other in the museum at Oxford. Each consists only of the extremity of the lower jaw, with its few teeth, which are however perfectly characteristic, showing the large size and spiral arrangement distinctive of this genus of ganoids. " Cat. Foss. Fish. Brit. Mus. ii, 330. " Ibid. 392. 38
