GRAPTOLITES OF NEW YORK, PART 2 39 



The collection from the Utica shale of Cincinnati kindly loaned to me 

 by Dr Ulrich contains: 



Dictyonema arbuscula ( Ulrich) Climacograptus typicalis Hall 



Mastigograptus tenuiramosus (Walcott) C. putillus {Halt) 



M. gracillimus (Lesqusreux) Lasiograptus bimucronatus mut. (Diplo- 



Chaunograptus gemmatus sp. nov. graptus whitfieldi et spinulosus auct.) 



Leptograptus annectans (Walcott) 

 Dicranograptus nicholsoni Hopkinson 

 (Dicr. ramosus auct.) 



It will be observed that this is in all respects a true though greatly 

 depauperated Utica graptolite fauna. Especially notable is the absence of 

 Glossograptus quadrimucronatus, G. ? eucharis, Climaco- 

 graptus bicornis and of the later mutation of Diplograptus 

 foliaceus. According to Nickles [1902, p.68 ff] 



Mastigograptus gracillimus (Lesquereux) C. putillus (Hall) 



Climacograptus typicalis Hall 



range through the formation while 



Mastigograptus tenuiramosus (Walcott) Lasiograptus bimucronatus mut. timidus 



Dicranograptus nicholsoni Hopkinson nov. 



are restricted to the lower Utica and Dictyonema arbuscula to 

 the middle third of the formation. 1 



On the other side of the Cincinnati geanticline or parma, in Wisconsin, 

 Minnesota, Iowa and Missouri, the Maqicoketa shale is currently considered 

 as the equivalent of the Utica shale of New York. Winchell and Schuchert 

 [1895, p.81 ff] cite Diplograptus pristis ? (Hisinger) Hall and 



•Ulrich and Schuchert [1901, p. 645] consider the middle and upper Utica of Nickles's 

 Cincinnati section as equivalent to the Frankfort shales, "the typical Utica barely reach- 

 ing that point, though something like 300 feet thick in northwestern Ohio." The presence 

 of Climacograptus typicalis and C. putillus in these beds does not seem 

 to support this view, since the former is not known here to pass beyond the Utica s'hale 

 and the latter only enters the lower or transitional Frankfort beds. It must, however, be 

 conceded that the graptolite faunas of the Frankfort and Lorraine shales in New York are 

 still very imperfectly known, and that both forms may possess longer ranges than hitherto 

 observed. 



