ROCKS. 

 Names. Associated tbssils, and localities. 



8 Shale (with Leptcena subplana). Lockport. 



9 do (with Atrypa nitida). Lockport. 



10 Limestone composed of crinoidal joints. Lockport. 



11 Anhydrous gypsum. 



12 White gypsum (or alabaster). Lockport. 



13 Encrinal limestone (polished). Lockport. 



14 Limestone (with crystallized coral). Lockport. 



15 Siliceous limestone. Niagara falls. 



16 Dark limestone (with Cytherina). Wayne county. 

 17, 18 Dark bituminous limestone. Wayne. 



19 Pearl spar. Lockport, Niagara. 



20 Dogtooth spar. Lockport, 



21 Pearl spar and dogtooth spar. Lockport. 



22 Dogtooth spar. Lockport. 



23 Limestone (with small geodes of pearl spar). Lockport. 



24 do (with galena, sulphuret of lead). Rochester. 



25 do (with zinc blende). Niagara falls. 



26 do (with crystals of zinc blende). Niagara falls. 

 27, 28 Fragments of Orthocera. Wayne county. 



29, 30 Sulphate of strontian. Lockport. 



31 Pearl spar with dogtooth spar. Lockport. 



32 Dark limestone (with cavities). Barre, Orleans. 



33 Dark limestone (upper part of rock). Niagara falls. 



34 Encrinal limestone. Niagara falls. 



35 Libiestone (with Cladopora seriata). Lockport. 



36 Dark limestone. Near Lenox, Madison. 



37 Brecciated limestone. Oneida county. 



38 Brecciated limestone. Ham's quarry. 



39 - 42 Conglomerate limestone. 



43 Conglomerate limestone. Ham and Bigelow's quarries. 



43 



