ROCKS. 45 



Names. Associated fossils, and localities. 



73 Limestone (with dogtooth spar). Lockport. 



74 do (with pearl spar). Lockport. 



75 do (with geode of dogtooth spar). Lockport. 



76 Sulphate of strontian. Lockport. 



77 Limestone (with pearl spar and dogtooth spar). Lockport. 



78 do (with geode of pearl spar with selenite). Rochester. 



79 Anhydrous gypsum. Lockport. 



80 SULFHATE OF STRONTIAN. Lockport. 



81, 82 Limestone (with pearl spar). Lockport. 



83 Limestone (with geode filled with bituminous coal). Lockport. 



84 do (with dogtooth spar). Lockport. 



85 do (wi,th pearl spar and dogtooth spar). Lockport. 

 86, 87 do (with dogtooth spar). Lockport. 



88 Pearl spar (a geode). Lockport. 



89 Pearl spar and dogtooth spar. Lockport. 



90 Pearl spar (rose-colored). Lockport. 



91 Limestone (with rose-colored pearl spar and dogtooth spar). Lockport. 



92 do (with dogtooth spar and sulphate of strontian). Lockport. 



93 do (with dogtooth spar). Lockport. 



94 Pearl spar in geode of limestone. Lockport. 



95 Dogtooth spar. Lockport. 



96 Dogtooth spar and pearl spar (replacing Astrocerium vennstum). 



Lockport. 



97 Brown spar. Lockport. 



98 Limestone (with Euomphalus he?nispherica) . Lockport. 



99 Concretionary limestone. North of Manchester. 



100 Limestone (with concretionary nodes upon surface). Niagara falls. 



101 Geode (with pearl spar and crystals of sulphate of strontian). First 



excavation of Erie canal, 1825. Lockport. 



102 Limestone (a concretion). Near Skonondoa, Oneida. 



103 Dark bituminous limestone. Between Lenox basin and Canastota. 



104 Limestone (with cavity showing laminae of growth of Astrocerium 



venustum). Rochester. 



105 Compact limestone (with Cytherina). Ham's quarry, Cayuga. 



