4° 



NEW YORK STATE MUSEUM 



D. putillus Hall from it. The former determination refers quite obvi- 

 ously to specimens of Hall's species D . p e o s t a, originally described 

 from this region but not figured until lately. We have before us a collec- 

 tion from the Maquoketa shale at Spencer, 20 miles south of St Louis 

 secured by Dr Ulrich and containing a small new Climacograptus (C. 

 u 1 r i c h i ), related toC. typicalis; and representative collections 

 from the better known graptolite localities in Minnesota, Wisconsin and 

 Iowa, kindly secured for us by Professor Sardeson. These indicate the 

 presence of a slightly greater faunule than has hitherto been recorded. 

 One of the beds of Maquoketa shale contains a small graptolite in such 

 numbers that it has been distinguished as the Diplograptus bed [see Sarde- 

 son, 1897, p. 24]. Specimens from the exposure of this bed at Graf, la. 

 contain D. peosta in plastic preservation, exactly like Hall's type of that 

 species (from Maquoketa creek) in the American Museum of Natural His- 

 tory. Fragments of the Diplograptus bed at Elgin, la. contain Glosso- 

 graptus ? eucharis in great number and typical development and a 

 few specimens of G. quadrimucronatus. The well known locality 

 at Granger, Minn, furnishes in Diplograptus bed no. 1 1 : 



Diplograptus peosta Hall, the prevailing Lasiograptus bimucronatus mut. timidus 



form. nov. 



Climacograptus putillus (Hall) 



A few rock specimens from the Triplecia bed (=no. 10) near Wykoff, 

 Minn, contain Diplograptus peosta and others from the Leptaena 

 bed (=no. 13) Glossograptus quadrimucronatus. 



The complete graptolite fauna of the Maquoketa beds would hence 

 consist of: 



Diplograptus peosta Hall C. putillus ( Hall) 



Glossograptus quadrimucronatus (Hall) Lasiograptus bimucronatus mut. timidus 



G. ? eucharis (Hall) nov. 



Climacograptus ulrichi nov. 



On the whole, this association can properly be considered as a frag- 

 mentary Utica shale fauna, but it is to be noted that the most frequent form, 



