DESCRIPTIONS OF NEW SPECIES OF FOSSILS FROM THE 

 NIAGARA FORMATION AT WALDRON, INDIANA. 



By James Hall. 



[Read before the Albany Institute, March 18, 1879.] 



In the 4th volume of the Transactions of the Albany Institute^ I 

 have described a considerable number of new forms from the above 

 named locality of the Niagara group, and also noticed the occur- 

 rence of other known species in the same association. The 

 Corals and Bryozoa which, without a critical examination, I then es- 

 timated as " at least twelve sjDecies," have been subsequently illus- 

 trated in the 28th Report of the New York State Museum of 

 NaturalHistory^ and these together with other new or before unrec- 

 ognized forms amount to more than forty species. The entire 

 number of species now known to me from this locality is upwards of 

 150, including varieties. 



In the autumn of 1877, Mr. Charles D. Walcott with the aid of 

 Mr. C. Vandeloo made large collections of fossils from the Waldron 

 locality, which have furnished the following new forms, together 

 with an additional number of known Niagara species, not before 

 recognized at that place. 



In the preparation of this paper I have been very ably assisted by 

 Mr. George B. Simpson who has carefully studied the Bryozoa and 

 ■ separated the species here described from the previously illustrated 

 forms (in the 28th Museum Report) indicating their distinctive 

 characters. Mr. C. E. Beecher has likewise selected and arranged 

 the remaining species of the entire collection, enabling me to add 

 several new species of crinoidea and other fossils. 



PROTOZOA. 



Receptaculites sacculus n. sp. 



Body longitudinally subcylindrical, hollow, open at one end (the 

 base ?), length less than twice the diameter. Cells irregular in size 

 and arrangement, somewhat smaller near the base, expanding at 

 the aperture to twice the diameter below. Distance between the 



Trans, x.] 8 



