PALEONTOLOGY. 275 



1880. The following new genera, species, and varieties appear in this 

 volume: 



Tentaculites Niagarcnsis (Hall), var. Ciimberlandia; u. var., p. 5, pi. cxiv, f. 3-6. 



Tentacitlites acitla, p. 6, pi. cxiv, f. 15-17. 



Tentaculites Dexithea, p. 6, pi. cxiv, f. 18, 19. 



HyoUthcs heros, p. 7, pi. cxiv, f. 24-27. 



Styliola spica, p. 7, pi. cxiv, f. 28. 



Coleolus Hvrzori, p. 7, pi. cxiv, f. 29. 



Pharctrella, uov. gen., p. 7. 



Pharetrella tenebrosa, p. 7, pi. cxiv, f. 30, 31. , 



Cornulites immaturits, p. 18, pi. cxv, f. 40. 



CornuUtes, sp. ?, p. 19, pi. cxvi, f. 24,25. 



ConiuUtes chrysalis, p. 20, pi. cxvi, f. 26-28. 



CornulHes cingulatus, p. 20, pi. cxvi, f. 29. 



Cornulites tribuUs, p. 20, pi. cxvi, f. 30. 



James Ball (95) publishes in the Sixth Annual Eeport of the State 

 Geologist (lescriptionsofFenestellidiB of the Hamilton group. Eighteen 

 species were previously described, but not figured, in the Thirty-sixth 

 Annual Eeport of the New York State Museum, 1884, and are here re- 

 described and figured. Two new species from the Hamilton are de- 

 scribed, one of which is figured ; two new species are from the Waverly 

 of Ohio ; the new species are as follows : 



Fenestdla albida, p. 48, pi. vii, f. 1-7, Waverly group, Richfield, Summit County, 

 Ohio. 



Fenestella bemicycla, p. 55, pi. vii, f. 12-16, Darieu, New York, and West Will- 

 iams, Canada. 



Fenestella aperta, p. 58, pi. iv, f. 1-5, Waverly group, Richfield, Ohio. 



Fenestella spissa, p. 59 (no figure), Hamilton, West Bloomfield, New York. 



Samuel G. Williams (304) contributes a paper with the title " The 

 Tully limestone, its distribution and its known fossils." The author 

 offers a list of over a hundred species, the majority of which are com- 

 mon in the Hamilton shales immediately below the Tully limestone. 

 The indefinite notion the author has of the limits of the Tully limestone 

 is showu by his statement on page 20, that the estimate of the thick- 

 ness varies " according as one includes or excludes the impure mixed 

 top and bottom portions." This easily explains the length of the list 

 of " known " Tully species. The transition from the richly fossiliferous 

 fauna of the upper layers of the Hamilton to the comparatively barren 

 Tully limestone is so sharp that it is not safe to include even the species 

 found in the shale adhering to the bottom of the heavy blocks as 

 " known fossils" of the Tully fauna. 



C, S. Prosser (222) read an interesting paper before the American 

 Association for the Advancement of Science on the U[)per Hamilton of 

 Chenango and Otsego Counties ; the order and composition of the fau- 

 nas of these rocks have been carefully studied by the author. 



Charles R. Keyes (135) describes the following two new fossils from 

 the Devoniou of Iowa : 



Conocardium altum, p. 26, pi. xii, f. 4a, Ab, Iowa City, Iowa. 

 Cyrtoceraa opimum, p. 26, pi. xii, f. 5, Johnsou County, Iowa. 



