GRAPTOLITES OF NEW YORK, TART 2 387 



and Gl os so or. ? eu char is. It is now known to be the most com- 

 mon biserrate graptolite of the Utica formation in Canada and in the belt 

 girdling the Adirondacks. In the slate belt along - the I liaison river a variety 

 has been found in great numbers and exquisite preservation in the quarries 

 at the Rural cemetery between Albany and Troy and another in the out- 

 crops of the Utica formation to the north and south of this locality (as 

 at the Normanskill above Normansville, at the penitential')' in Albany, 

 Black creek near Yoorheesville, etc.). In New York State it also enters the 

 Lorraine formation and occurs, in the lowest part of the formation at least, 

 in a well defined mutation but has as yet not been found below the Utica 

 formation. In the west it appears to occur in a variety in the Utica shale 

 at Cincinnati. 



Ami states that it is the most common graptolite in the Utica shale of 

 Canada and is found almost invariably in all collections from that formation. 

 He records it from numerous localities of the Canadian belt of Utica strata, 

 notably the neighborhood of Quebec, Montreal, and the north shore of Lake 

 Huron, and besides from the basins of Lake St John and Ottawa. He does 

 not cite it from the Lorraine beds. 



The form from Belmont, Nev., identified by White [Wheeler's Rep't] 

 with G. quadrimucronatus is, according to Gurley [1896, p. 306], 

 not identifiable. 



In Great Britain it has been recognized by Nicholson in the shales at 

 Dobbs Linn in Scotland and is recorded by Lapworth (1880, p. 359) as 

 occurring in the Pleurograptus-linearis zone which is the highest of the 

 Lower Hartfell shales and also in the Tralodden beds in the Girvan district. 

 In Scandinavia it is the characteristic form of a graptolite zone in the 

 Trinucleus-beds of the Middle Graptolite shales in Scania. 



T. S. Hall has this year also announced the occurrence of this species 

 in the rocks of Victoria, Australia. It is distinguished there by the pres- 

 ence of four prominent spines at the level of about the seventh or eighth 

 thecae, a feature which it has in common with Scottish and Irish forms. 



Remarks. In his paper in the Report and Proceedings of the Belfast 



