408 Thirty-fifth .Report on the State Museum. 



combined collections, but are not here indicated for want of space for 

 a complete description of the species. The accompanying paper con- 

 tains descriptions of the Oyathophylloid forms which have been recog- 

 nized as new or not heretofore described. 



My thanks are especially due to Mr. George B. Simpson, without whose 

 efficient aid I could not, at the present time, have undertaken the prepa- 

 ration of this paper. He has already, during previous years, in con- 

 nection with myself, made critical studies of the species during their 

 examination for the selection of specimens for drawing, for the palae- 

 ontology of New York. He is therefore familiar with these forms, 

 especially of the Upper Helderberg group in all their varying aspects. 



More than eighty plates of original drawings of corals, for the Palae- 

 ontology of New York have been completed for more than two years 

 past (some of these having been published in 1876), but the delay in 

 the publication of that part of the Natural History of the State, renders 

 it important to present through other channels, some evidence of work 

 done. Unfortunately for that work and for the evidence of general 

 progress in the work of the State Museum, we have had no publication 

 (except a single separate paper*) since 1879. 



The present (35th) report contains the scientific papersf communi- 

 cated with the 33d and 34th Eeports of the State Museum, except 

 the Eeports of the State Botanist,, 



* The corals and Bryozoans of the Lower Helderberg Group. 



f The paper on the Bryozoans of the Upper Helderberg and Hamilton Groups, 

 communicated to thew33d Report of the State Museum having been published, in 

 abstract, in the Transactions of the Albany Institute, is for the present, with- 

 drawn from the Museum Report. 



