Report of tee State Geologist. 379 



trations of the volume. The New York Niagara Brachiopods are 

 rarely in a condition to obtain a knowledge of the interior append- 

 ages or apparatus, and heretofore it has been only from the more 

 solid or crystalline specimens from Waldron, Indiana, that we have 

 been able to obtain a knowledge of the interior of the Niagara 

 forms. 



Besides this very extensive and magnificent collection of the 

 Niagara group, Mr. Greene has also a large one, chiefly of Brachio- 

 poda and Cephalopoda from the Hamilton group in its exposures 

 near Milwaukee. Of these I have obtained specimens of Spiri- 

 fera and of Lingula and Discina. 



One of the most interesting and instructive features of Mr. 

 Greene's great collection is the fact that it is strictly of local 

 origin, and one is able to get a clear and comprehensive view of 

 the Silurian fauna of this region without being embarrassed by 

 the presence of species from distant localities. 



Mr. E. E. Teller, of Milwaukee, has a very good collection of 

 the Niagara group fossils of the country around Milwaukee. 

 From this collection I obtained the loan of some Spirifers for 

 study, and also some specimens preserving the internal spiral 

 appendages of Spirt/era nobilis, which I had not before seen. 

 These will be illustrated in the forthcoming volume. 



Mr. W. C. Egan, of Chicago, possesses a very good local collec- 

 tion of the Niagara fossils, including Chicago and its vicinity and 

 the neighborhood of Milwaukee. His collection also embraces 

 Lower Silurian, chiefly of the age of the Hudson Biver group, 

 and also Devonian and Carboniferous species. I obtained from 

 Mr. Egan the loan of a number of specimens which will add to 

 our means of illustrating the volume on the Brachjopoda. 



I should in this place make my acknowledgments to Miss Mary 

 E. Holmes, of Bockford, Illinois, a graduate of the University of 

 Michigan, and the author of an interesting and valuable paper on 

 " The Morphology of the Carinae on the Septa of the Bugose Corals." 



Early in the spring I wrote to Miss Holmes of my plans 

 regarding the work on the Brachiopoda, and she entered at once 

 into the spirit of my scheme and wrote to many of her friends in 

 behalf of the object. By this means I became acquainted with 

 the names of many persons and institutions possessing local or 

 general collections. Some of these I have visited and others 

 remain to be examined in the future. 



