07 



In the lower part of this drift, which is finer than the upper drift, gold 

 has been found, more particularly, however, on the Indiana side. 



The fossil remains in the county are rich, and a fuller report may be given 

 at some future time. Only a few can receive our attention in this paper. 

 Near Aurora and Lawrenceburgh numerous bones of the mastodon and 

 mammoth have been found. The bones of a sloth and the skull of a black 

 bear have also been found, and a few other mammals. Brachiopods, crin- 

 oids, trilobites, mollusks, bryozoa, corals, etc., are found in great abundance. 

 The trilobites are not so numerous as they used to be, for most of the speci- 

 mens have been collected — that is, the surface specimens. While exploring 

 a mound four miles north of Moore's Hill several large specimens of the 

 coral, tetradium fibratum were found. One of them required four men to 

 place it in the wagon. One little ravine seemed to be literally filled with 

 it. Prof. Gorby pronounced these the finest specimens of the kind in the 

 state. They are now in the museum at Moore's Hill College. 



The cystidiaxs of Jefferson couxtv, Ind. — By Geo. C. Hubbard. 

 These fossils form an order of the crinoids, and are most abundant in the 

 Niagara group. About thirty species, up to this time, have been found in 

 Jefferson county, which proves it to be the richest locality in this respect 

 in North America, if not in the world. Fifteen new species will be described 

 and figured in the 17th report of the Geological Survey of Indiana, most of 

 which, if not all, were collected by Mr. John Hammel. Those found be- 

 long to the genera holocystites, caryocrinus and allocystites. These fossils 

 are uniformly found in shale or soft limestone, near the bottom of the Ni- 

 agara group. Near Madison few have been found and these are in poor 

 condition; but along Big creek, in the northern part of the county, they 

 are more numerous and are well preserved. On two or three occasions I 

 had the pleasure of accompanying Mr. Hammel to Big creek. Numerous 

 other fossils were found, but few cystidians. If an experienced collector 

 finds two or three good specimens in a day's search he may consider him- 

 self fortunate. A few are found in the debris at the base of the low cliffs or 

 in the bed of the creek ; more are obtained, however, by moving along on 

 hands and knees and closely examining the various strata known to con- 

 tain them, as well as the bottom of the projecting rocks above, for they are 

 often found adhering to the lower surface of certain strata. 



