ROCKS. 39 



Names. Associated fossils and localities. 



17 Shaly sandstone (with L. sericea). South of Verona, Oneida. 



18, 19 Limestone (with Ptntamerus oblongus). Rochester, Monroe. 



20 Siliceous limestone (with P. oblongus). Wolcott, Wayne. 



21 Limestone (with Atrypa hemispherica) . Below Martville, Cayuga. 



22 Limestone (with fragments of P. oblo?igus). Sodus, Wayne. 



23 Oolitic iron ore. Rochester. 



24 Oolitic iron ore (2 specimens). Stebbins's creek, Oneida. 



25 Limestone (with Leptana rugosa). Donnelly's quarry, Madison. 



26 Oolitic iron ore. Wolcott, Wayne. 



27 do (with fragments of shells). Donnelly's quarry. 



28 do (with Ptntamerus oblongus). Donnelly's quarry. 



29 & 30 do (with Spirifer radialus). Donnelly's quarry. 

 31 Ferruginous limestone (with P. oblongus). Donnelly's quarry. 

 32, 33 Shaly sandstone (with Rusophycus pudicus). Gaylord's quarry. 



34 Atrypa congesta. Reynale's basin, Niagara. 



35 Atrypa plicatella. Reynale's basin. 



36 Shale (with Graptolithus clintonensis). Sodus. 



37 Limestone (with Atrypa hemispherica). Rochester. 



38 Limestone (with A. reticularis and P. oblongus). Donnelly's quarry. 



39 Gray sandstone (with fragments of Homalonotus delphinocephalus). 



Steel's creek, Herkimer. 



40 Gray sandstone (upper mass of group). Steel's creek. 



41 Shale (with Atrypa congesta). Reynale's basin, Niagara. 



42 Atrypa plicatella. Reynale's basin. 



43 Chcetetes lycoperdon. Reynale's basin. 



44 Upper gray sandstone (with Modiolopsis ovata). Remington's quarry. 



45 Limestone (with Atrypa congesta). Medina. 



46 Caninia bilateralis (2 specimens). Reynale's basin. 



47 Atrypa congesta. 



48 Fibrous sulphate of strontian. Stark, Herkimer. 



49 Fibrous sulphate of strontian (with carbonate of lime, etc.). Stark. 



50 Crystallized sulphate of strontian. Stark. 



51 Gypsum. Stark, 



