408 NEW YORK STATE MUSEUM 



chert from the Galena limestone of Minnesota and Wisconsin (?J and the 

 Cincinnati group at Cincinnati; Ulrich [1888] assigns it to his beds XI a 

 and b, and Gurley to the Utica and lower Cincinnati and Nickles lists it, in 

 his Geology of Cincinnati, among the forms ranging through the Utica, but 

 does not cite it from the Lorraine group. In this State it is also restricted 

 to the Utica shale and is there one of the most common and characteristic 

 graptolites. It is as frequent in the belt of Utica slate paralleling the Hud- 

 son as in that girdling the south and west of the Adirondacks. It seems to 

 be absent in the beds transitional from the Trenton to the Utica, but has 

 been observed in the late Utica horizons where Lorraine forms make their 

 appearance [Ruedemann, Bui. 42, p. 526]. 



The Canadian geologists do not mention this species in their fossil 

 lists, but it is quite possible that it is hidden under the designation 

 C. bi corn is; for it extends through the Champlain basin where I 

 collected it at the south end of Grand isle. 



In the West C. typicalis has a greater range than has been 

 observed here for it may occur in the Galena limestone, and I have before 

 me typical specimens from the lower third of the Eden shale in Covington, 

 Ky. [Ulrich coll.] 



A " ( ?) C . aff. typicalis Hall ou confertus Lapworth " is cited 

 by Flamand [1905] among the graptolites from the central Sahara. Since 

 it is associated with Siluric forms, identity with our species is out of 

 question. 



Remarks. It is peculiar that this species though frequently illustrated 

 has never yet been described. At first Hall probably comprised it under 

 his Graptolithus scalar is [Pal. N. Y., v. 1, pi. 73. tig. 4c]; in the 

 Canadian Organic Remains it is full)- illustrated in all its characters, but in 

 the text only mentioned in the table showing the geologic distribution of 

 the species. 



This type is easily recognized by its slender, whiplike sicular end and 

 the very small overlap of the early thecae, giving them the appearance o\ 

 being freely suspended or of rectangular hooks. Also the aspect of the 



