﻿W. S. Shaler — Geology of Cdbscooh Bay District, Me. 57 



Niagara in New York. The dozen or more, less well deter- 

 mined forms, the names of which are not given in this list, 

 probably belong in the same series of strata. 



As the collections made at this locality came from about one 

 hundred feet in thickness of beds and contain several thousand 

 specimens, they may fairly be taken to represent the general 

 nature of the life of the Clinton and Niagara epochs in the sea 

 of this region. It is interesting to note the fact that several 

 very important and elsewhere abundant genera and families 

 of animals are not represented here. Not a trace of a coral 

 and no bryozoan has been found in the collection. Crinoids are 

 extremely rare and are represented by a few small fragments of 

 stems. Among the Brachiopoda the Strophomenas are repre- 

 sented by only one obscure species, and the characteristic Stro- 

 phodontas do not appear; the genus Orthis is very scantily 

 represented. The most abundant group in number of species 

 is that of the Lamellibranchiata. 



So far not one of the species in this locality has proved to 

 be clearly identical with those collected at the previously 

 described locality in Orange Bay, but it is not impossible that 

 among the undetermined forms some species common to both 

 may be found. 



The next set of beds in order of importance, which permit 

 of approximate identification, are those which are exposed at a 

 point about one mile northeast of Dennysville. These beds 

 are scantily exposed in the belt below the high tide level, 

 where they appear in the form of low glacially worn ridges. 

 The specimens collected from this locality probably represent 

 in a very inadequate way the fauna found in the rocks. 



The total number of species collected is about twenty, of 

 which the following are approximately identified. 



List of Species. 

 Pleurotornaria percarinata, var. Trenton. 

 Atrypa nitida, var. Niagara. 

 " aprinis, var. Niagara. 



P t( 1 *i i - f not distinctly separable. Niagara. 



Syringopora multicaulus ? Niagara. 

 Heliolites spinipora. Niagara. 



All the unidentified forms from the preceding locality seem 

 to be related to Niagara species. Thus, as far as this limited 

 evidence goes, these beds are to be taken as belonging to the 

 Niagara limestone, or at least having a close relation to the 

 beds of that horizon. 



By far the most important section of the paleozoic series of 

 rocks as regards its thickness or its geological significance 



