.")!() AXNALS OF THE CaRNEGIE MuSEUM. 



ments of encrinites and other organic remains, including Bolboporites 

 ainericamis, Cainarotcechia orientalis, a few of Camerella varians and 

 other s[)ecies. 13 feet. 



" Gray nodular limestones with Slylaraa parva, Monofrypel/a, Phyl- 

 lofiorina incepta, Rafinesqniiia iiicrassata, Ctenodonta 7iasiiia, Plecto- 

 ceras Jason, Plio7nerops canadensis, Eoharpes antiquatiis, lllcrnus 

 globostis. 20 feet. 



"Gray magnesian limestone \\\\\\ Lophospira aspera?, Maclurites 

 atlanticiis, Orthoceras iuulticameratuin, Orthoceras bilincaium, O. 

 7iatator, O. iiuiro, O. anteniv, O. ini/tgancnsis, O. s/iin/iardi, Ilkcniis 

 l>ayjie/di and other fossils." 12 feet. 



Total 78 feet^ 



Another section, occurring on Large Island, is given. It measures 

 171 feet 5 inches, and from the fact that it is almost devoid of fossils 

 it is suggested that it probably overlies the preceding beds. The 

 strata are nearly all limestone with a little shale, dolomite, and chert. 

 The total thickness of the Chazy, in that region, is estimated at about 

 300 feet. 



The following is the fauna of the Chazy at Mingan Islands, so far 

 as it can be determined from the published lists : 

 Bolboporites ainericanus, Plectoceras j a so 11 , 



Monotryprl/a sp., Ortlioccras biliiicatuni, 



Pliyl/oporina incepta, Ortlioceras antenor, 



Stylarcea pafva, Orthoceras niaro, 



Flctciieria incerta, Ortlioceras niinganensis, 



Rajinesqiiina incrassata, Ortlioceras miilticanieratiim, 



Orthis piger, Orthoceras natator, 



Camerella longirosfris, Orthoceras shiimardi, 



Camerella varians, Eoharpes antiqnatns, 



CainarotcTchia orientalis^ Plionierops canadensis, 



'/ Ctenodonta nasi/ la, Plhnuis globosus, 



Straparolliis sp., 1 1 ken us bayfieldi, 



Maclurites atlanticiis, Leperditia amygdalina. 



Lophospira aspera. 



Of these species, the following occur in the Chazy formation of the 

 Champlain valley : 



Bolboporites americanus, Orthoceras bilineatuni, 



Phxlloporina incepta, Orthoceras multicameratum, 



