REPORT OF THE DIRECTOR I918 1 53 



why the fossils here identified can not belong to the Cambrian era. 

 There are furthermore several Globigerinae which appear to be iden- 

 tical with the forms described by Matthew from the Middle Cam- 

 brian of Hanford Brook, St Martin's, N. B. 



On the other hand, we find numerous Lagenae which are well 

 known from the Silurian and have been desjcribed in several reports. 

 Verneuilina has been recognized from the Cambrian and it is not 

 impossible that some of the Virgulina or Bulimina — like types we 

 have identified belong to this genus, but this is not likely. We 

 believe, all things considered, that these cherts came from late 

 Cambrian and early Ordovician formations, with the greater proba- 

 bility that they are Ordovician. We might argue: if they are so 

 highly developed and in such profusion why not place them in the 

 Devonian. In the first place, we do not find many Foraminifera in 

 that era and no typical Devonian species like Lagenulina or Fusulina 

 are known among this group. Many of the Devonian formations 

 are now thought to have been either terrestrial, wind-blown sands or 

 fresh and brackish water deposits; and in some cases, like the horn- 

 stone of the Corniferous, fresh water desmids occur. 



Our belief is, therefore, that, with all evidence considered both 

 from Foraminifera and other organisms, these cherts came most 

 likely from deposits of Ordovician age. If from other evidence 

 they can be traced to Cambrian we would not be surprised, as cer- 

 tainly many of the types we recognize are present in Cambrian forma- 

 tions. The seas were of considerable depth and the Foraminifera 

 deposited far from land. The waters were clear and free from much 

 terrigenous material. These facts are shown in the very minute, 

 but abundant, Textulariae and Bolivinae, genera whose shells 

 were built of delicate hyaline calcareous material. 



A partial bibliography of the works most helpful in this study is 

 given below. 



Bibliography of Some of the Principal Works Consulted in this 



Report 



A Monograph of Carboniferous and Permian Foraminifera (The genus Fusulina 



excepted). H. B. Brady, Paleontographical Soc, v, 30 (for 1876), 166 p. Pis. 



1-12 

 Note on Some Silurian Lagenae. H. B. Brady. 1888, Geol. Mag., n. s., Dec. 



Ill, V. V, p. 481-84, pi. 13 

 On Phosphatic Nodules from the Cambrian of Southern New Brunswick. W. D. 



Matthew. Trans. N. Y. Acad. Sci., 1893, 12: 108-20, pis. 1-4 

 The Protolenus Fauna. G. F. Matthew. Trans. N. Y, Acad. Sci., 1894, 14: 



101-53. pis, i-ii 



