Rathbun.) S8 fMay 15, 



only from the Corniferous limestone and Schoharie grit of North 

 America, and Strophodonta perplana is found in the same formations 

 and also in the Hamilton and Chemung groups. Of species much 

 more abundant in the Maecurii than the Erere beds; Tropidoleptus 

 caj-t/ia^us is essentially a Hamilton group form; C/wnetes Freilasii in 

 its younger stages resembles C. dejlecta of the Hamilton, but the larg- 

 er, more abundant forms are represented in New York State by the 

 larger type of Chonetes of the Corniferous limestone. Rhynchonella 

 dolls of the Maecurii is probably as closely related to some of the 

 Corniferous Rhynchonellse as to any of the Hamilton. I have been 

 unable to make satisfactory comparisons of the Orthes, but they are 

 of North American Devonian types. 



Of the new species of Maecuru Spiriferae; Spirifera mcecxiruensis is 

 closely allied to S. disparilis of the Corniferous, and S. Derhyi re- 

 sembles .5. raricosta of the same formation. 



Of the species peculiar to the Erere beds, or most abundant there; 

 Spirifera Pedroana appears to have related species in both the Cor- 

 niferous and Hamilton groups of N. America; Chonetes Comstockii 

 represents C. coronnta of the Hamilton group; and Retzia Jamesiana 

 is most like R. lepida of the same formation. Spirifera yramUifera 

 of the Hamilton group of N. America is represented at Erere by a 

 similar species, and Lingula spalulato. is a Hamilton group species. 

 As might be expected, Streptorhynchus Agassizii is as common to both 

 the Maecuru and Erere beds as the North American species, which it 

 represents, is common to the Corniferous, Hamilton and Chemung 

 groups of New York State, etc. 



It would appear from the preceding comparisons that the Erere 

 beds, as determined by their fossils, and as before indicated in my 

 previous paper on the Erere Brachiopods, are more closely related to 

 the Hamilton group than to any other North American formation ; 

 but the Maecuru and Curud fossiliferous beds, although they contain 

 a sufficient number of Erere species to prove their close connection 

 with the deposits at the latter place, yet they also bear a nearer rela- 

 tionship to the Corniferous group of New York State, than do the 

 Erere beds. In Pard we have the same general order of succession 

 of species as in the Corniferous and Hamilton groups of N. America, 

 and a similar intermingling of forms. The number of species of 

 Brachiopods recorded from the Brazilian Devonian is so much small- 

 er than that known from N. America, and the fossiliferous localities 

 visited are so few, that we must expect further explorations to more 



