NO. 8 



SMITIISOMAX KXl'LOKATIONS, iyi3 



^5 



The investigations of the i)ast summer were confined to the Kas- 

 kaskia rocks of Afonroe and Randoli)h Counties, Illinois. They were 

 systematically carried on in connection with the geological work 

 for the State of Illinois, in progress at the .same time under the direc- 

 tion of Professor W'eller, in order to have the l)eneht of accurate 

 determinations of the horizons from which the collections were made, 

 with reference to the several suhordinate formations intcj which the 



Fk;. 17. — Portion of a slab of fossil Crinoids In mi Illinois. 

 Photograph by National Museum. 



Kaskaskia of that region is divided. In this way it was hoped to 

 rectify some confusion as to the stratigraphic relation of a numl)er 

 of species descrihed in the (ieological Reports of Illinois and Iowa. 

 The oi^erations were successful in this respect, and at the same time 

 six large hoxes of tine specimens were obtained. Among the speci- 

 mens there are a number of slabs covered with Crinoids not hitherto 

 found in that formation, in an excellent state of preservation. A por- 

 tion of one slab, containing 22 specimens of 9 different species, is 

 shown in the accompanying illustration (fig. 17). This s])ecimen and 



