No. 200.] 
113 
Radiaria. European localities. 
Caryocrinus loricatus, Say. 
ornatus, S. 
Testacea, ^ 
Pentaraerus elongatus, C. 
Delthyris lineata, S Dudley. 
Leptaena depressa, S do 
Atrypa affinis, S do 
Crustacea, 
Platynotus boltoni. 
Asaphus caudatus, Dudley. 
limulums, Green. 
Trimerus delphenocephalus, G. 
No trilobite of this or the preceding groups has been found in the in- 
ferior strata. 
4. " Saliferous sandrock" of Eaton. Red sandstone and shales oc- 
curring in the banks of Niagara river, and admirably developed at the 
falls of Genesee river. The organic remains consist chiefly of fucoides 
Harlani, nobis (F. Brongniartii, Harlan.) Veins of fresh water shells 
occur in it at Medina. I obtained very perfect casts of the hinge of the 
Unio, shewing the cardinal and lateral teeth so distinctly as to remove 
all doubt of the generic relations of the shell. 
Organic Remains op the Fourth Group. 
Plants. 
Fucoides Harlani, C. 
Dictuolites, Beckii, C. 
Polypharia, 
Catenipora escharoides, G. 
Testacea. 
Unio Jvrimigenius, C. 
Lingula cuneata, C. 
Orthocera 
Cyclostoma pervetusta, C. 
Planorbis trilobatus, C. 
5. The fifth group consists of olive sandstone and slate, cut through 
by Salmon river, in Oswego county. Intercalated strata of limestone oc- 
cur in the lowest portion of the series, full of brachiopodous bivalves. 
This and the preceding red sandstone group correspond in geological 
[Assem. No. 200.J 11 
