'I'Rii.oni I'Es OK TiiK Chazv I.IMESTON'K. 



:579 



Chazy. PseudospJicerexochus vulcamis, which is the only trilobite com- 

 mon to the Calciferous and Chazy, occurs with the rest of the Fort 

 Cassin fauna at Standbridge, Quebec. Such species as are represented 

 by similar species in the Calciferous are given in the following table : 



Chaz)' species. 

 Hirpiiia ottinvaensis, 

 Remipleurides canadensis, 

 Bathyureli.us minor, 

 lsotelus iiarrisi, 

 Illanus erastusi, ) 

 Illcsmis globostis, j 

 Platymdopus viinganensis, 

 Aniphion canadensis, 



PsEUDOSI'H.KREXOCIIUS VUI.CANUS, 



Fort Cassin fauna of Calciferous. 

 Harpina cassinensis, 

 Remipleurides afkinis, 



BaTMYUREI.LUS VAI.IDUS, 

 ISOTEI.rS C.VNAI.IS, 



f Itlicmis incertus, 

 y Ilt(cniis tiimifrons, 



Platymetopus jiiksii, 



Aniphion salteri, 



PsKUDOSrH.KREXOCHl'S VUI.CANUS. 



The Fort Hunter fauna in the Little Falls dolomite of the Mohawk 

 Valley, which was discovered by Harris and described by Cleland, 

 has only one trilobite, Asaphns canalis{?) Cleland — an Isotelus \\'\\\\2, 

 spine-bearing genal angle — which resembles a Chazy form. The 

 Calciferous of the Ottawa valley also has an Isotelus of somewhat simi- 

 lar type, and the Upper Kittating limestone of New Jersey contains 

 an Isotelus which AV'eller refers to Isotelus canalis. The Calciferous of 

 central Pennsylvania, according to Collie, contains an Asaphns which 

 much resembles Asaph its mafgi/ialis Hall of the Chazy (not the 

 AsapJiiis Jiiariiiiialis of this paper). 



The next formation with which this fauna should be compared is the 

 Newfoundland section, and it will be seen that the fauna of Division 

 P, which has been referred to Lower Trenton time, contains .several 

 species which are closely related to species in our fauna. 



Chazy species. 



LONCHODOMAS HAl.LI, 



Remipleurides canadensis, 

 Bathyurellus brevispinus, 

 Illctnus bayfieldi, 

 IllcBntis erastusi, 

 Platyfiietopits ininganensis, 

 Cybele vitleourensis, 

 Amphion canadensis, 

 Ceraurus POMPILIUS, 

 PsEUDOSPH.^REXOCHUS VUI.CANUS. 



Newfoundland, iJivision P. 



f LONCIIODOMAS NORMALIS, 

 ] Lonchodomas SEMICOSTATUS, 

 Remipleurides schlotheimi, 

 . Bathyurellus formosus, 

 J IlLcmis fratermts, 

 \ lllicmis consobrimis, 

 Platymeloptis jukesii, 

 Cybele minis, 

 Amphion k.arrandei, 

 Ceraurus polydorus, 

 pseudosph.^rexociius vui.canus. 



