Two of the specimens are compressed, circular in form; one is two inches in length, and the greatest breadth is three-fourths of an inch; its two edges run parallel near, one-fourth of an inch from where it tapers rapidly to a point. These specimens may represent rays. Another specimen appears to be part of a disk, and judging from its form it seems possible that it was possible that it was supplied with such rays as those described. Two other fragments were observed, in which some small specimens of Bellero-phora vibratus were found within the envelope of the plates. Locality and Position: From the Cincinnati Group at Carthage, Ky., at an elevation of about 275 feet above low water mark in the Ohio River. Found by Mr. H. Dickhant and the author. Lepidolites dickhanti, White, No. 21 All the specimens of this species examined are exceedingly flattened; but their original form undoubtedly was either sub-spherical or sub-pyramid with the lower portion considerably indented. The curved edge of scale-like plates is very thin, being little more than one-hundredth part of an inch in thickness, and appears to have been slightly flexible. The plates are brittle with the exposed margin rounded, and arranged in concentric lines crossing each other in a grain manner; they are much smaller about the indented portion, gradually becoming larger as the discs approach the upper portion. The appearance presented by a specimen that is flattened vertically, is very like that style of ornamental work or watch-cases called "one-barrel turning". In the largest plates observed, the exposed portion has a diameter that is not more than one-thirty-second of an