ROCKS. 



37 



Names. Localities, etc. 



44 Medina sandstone. Martville, Cayuga. 



45 do (inclosing nodules of shale). Rochester. 



46 do (with Arthrophycus harlani). Wayne. 



47 do (variegated and shaly). Medina. 



48 do (shaly). Lewiston. 



49 do Redfield, Oneida. 



50 do (upper shaly layers). Medina. 



51 do (variegated). Lewiston. 



52 & 53 do (upper greenish layers). Lewiston. 



54 do (upper gray layers, witli Cytherina cylindrica): 



Medina. 



55 do (variegated). Near Martville, Cayuga. 



56 do (variegated). Lewiston, Niagara. 



57 do Rochester, Monroe. 



58 do (very shaly). Irondequoit bay, Monroe. 



59 do Medina, Orleans. 



60 do (with Lingula cuneata and Cytherina cylindrica). 



Medina. 



61 & 62 do (with nodules of shale enclosed); Medina. 



63 & 64 do (with Lingula cuneata). Lockport and Medina. 



65 do (with L. cuneata and Plcurotomaria percctusta). 



Medina. 



66 do (with L. cuneata). Medina. 



67 do Clarendon, Orleans. 



68 do (with tortuous lamination). Rochester. 



69 - 71 do (shaly variety). Lewiston. 



72 do (shaly). Rochester, Monroe. 



73 do (shaly). Martville, Cayuga. 



74 do (with C. cylindrica and L. citneata). Medina. 



75 do (with concretionary surface). Oswego. 



76 do (with Arthrophycus harlani). Medina. 



77 do (with A. harlani). Adams's basin, Monroe. 



78 do (with Fucoides? heteio\ihyllus). Adams's basin. 



79 & 80 do (with FJ helerophyllus). Medina. 



