REPORT OP THE STATE PALEONTOLOGIST 1901 443 



•obstacles to the satisfactory execution of the undertaking 

 which have arisen. In the completion and final revision of this 

 work some serious difficulties have constantly recurred because 

 of the incertitude involving many of the specimens on which the 

 investigations have been based, partly with reference to their 

 actual geologic position and partly relating to their geographic 

 locality. The material with which it was expected that the 

 investigations would be continued belonged largely to the col- 

 lection of Prof. Hall, and only a small part of this material has 

 been since his death available for these studies. Notwithstand- 

 ing these and other difficulties pertaining to its execution, I be- 

 lieve it practicable to present this subject in a form useful to 

 students. 



During the last year the following publications have issued 

 from the department: 



The annual reports for the years 1899 and 1900. 



Museum bulletin 39, containing a number of papers relating 

 to paleontologic and stratigraphic problems, as follows: 



A remarkable occurrence of Orthoceras in the Oneonta beds 

 of the Chenango valley, N. Y.; 



Paropsonema cryptophya, a peculiar echinoderm 

 from the Intumescens-zone (Portage beds) of western New York; 



Dictyonine hexactinellid sponges from the Upper Devonic of 

 New York, and 



The water biscuit of Squaw island, Canandaigua lake, N. Y., 

 by John M. Clarke; 



Preliminary descriptions of new genera of Paleozoic rugose 

 •corals, by George B. Simpson; 



Siluric fungi from western New York, by Frederick B. Loomis. 



Museum bulletin 42, entitled the Hudson river beds near 

 Albany and their taxonomic equivalents, by R. Ruedemann. 



Museum memoir 3, entitled the Oriskany fauna of Becraft 

 mountain, Columbia co. N. Y., by John M. Clarke. 



Museum bulletin 45, Guide to the geology and paleontology 

 of Niagara falls, by A. W. Grabau. 



