GRAPTOLITES OF NEW YORK, TART 2 5 



During this investigation of the higher graptolite faunas it has been 

 found necessary to ask from the Director of the United States Geologic al 

 Survey the loan of the types of a number of new species, mostly from the 

 Normanskill shales of New York (Stockport, Columbia co. r N. Y.), which 

 had been described, but not figured, by Dr R. R. Gurley in the Journal of 

 Geology [v. 4, 1896]. Our request was most liberally granted by the 

 authorities of the United States Geological Survey and of the National 

 Museum, but with the specimens there was delivered to us the voluminous 

 unfinished manuscript of Gurley's monograph of the graptolites with the 

 understanding that we should use as much as possible of the same, and thus 

 assure to Dr Gurley's long labors, the credit to which they are entitled. 

 The author has gladly availed himself of Gurley's work, which even in its 

 fragmentary form bears witness not only of the admirable patience and 

 enthusiasm of its author, but also of his keen power of observation. 



In justice to both Dr Gurley and myself a full statement of what this 

 voluminous manuscript contains and what has been used for this memoir, 

 should be given in this place. 



The greater part of the manuscript consists of copies of the descrip- 

 tions, and translations of those in other than the English language, of all 

 foreign species of graptolites together with a full bibliography of all species 

 described up to 1896. It is obvious that it was the author's intention to 

 produce a monograph of all the graptolites of the world. 



Another part of the manuscript contains the history and synonymy of 

 the American species. In this work Dr Gurley had evidently made special 

 efforts to trace the history of many of the cryptic names of the earlier geolo- 

 gists, as those of the graptolites mentioned in the reports of the first geo- 

 logical survey of New York by Emmons and others. These notes arc fairly 

 complete ; they have been used here as far as the scope of our work allowed 

 and due credit given the author. 



In the description of the North American graptolites Gurley had not 

 proceeded beyond the Dendroidea and a part of the Graptoloidea of the 

 Lower Champlainic. The former consist in the large majority of the 



