REPORT OF THE DIRECTOR I9O4 



23 



the various officers referred to in the preparation of reports upon 

 their work. Work that has been more strictly independent of 

 immediate field operations is the following: 



Paleontology 



Faunas of Beekmantown and Chazy limestones. During sev- 

 eral seasons past Dr Ruedemann has carried on investigations 

 relating to the faunas of the Beekmantown and Chazy forma- 

 tions of the Lake Champlain basin. The elaboration of these 

 faunas, specially the study of the Cephalopoda, has occupied 

 much of his attention and reports relating to these subjects are 

 in course of publication. It is well to note here that since the 

 date of Professor Hall's account of these early Siluric faunas in 

 1847 little has been done to revise or bring the knowledge up to 

 date. It was one of Professor Hall's unrealized purposes to re- 

 consider this early work in the light of later acquisitions and we 

 have undertaken this series of investigations in the hope of 

 bringing together all the added knowledge of the long interval 

 from 1847 to the present. 



Graptolites. Mr Ruedemann has completed during the past 

 year a memoir on the graptolites of the early formations which 

 constitutes a very valuable addition to the series of publications 

 on New York paleontology. 



Type specimens. Mr Ruedemann has also had in charge the 

 listing of the type specimens of fossils supplementary to the long 

 list which appeared in the type catalogue published in 1903. 

 This supplementary list is appended to this report and serves 

 to show the importance of the additions annually made to this 

 class of our collections. 



Devonic fishes. Agreeable to an arrangement made for the 

 study of the Devonic fishes of New York, Dr C. R. Eastman of 

 Cambridge Mass. has carried on investigations designed to bring 

 together all extant information upon this subject with a notice 

 of such undescribed material as is obtainable. It has further- 

 more seemed of importance to consider the relations of the 

 New York or eastern faunal province to the other geographic 

 provinces in order that we may get light upon problems of distri- 

 bution and succession. From the greater mobility of these vertebrate 

 creatures as compared with invertebrates it may be expected that 

 the evidence afforded by the former will be pertinent and circum- 

 stantial in indicating the direction in which migration has taken 



