MISSISSIPPIAN OF PHELPS COUNTY, MISSOURI 571 



This bowlder is so completely weathered that the original texture 

 is entirely gone, and in its place is a porous siliceous mass which 

 powders and crumbles and breaks irregularly. The original bedding 

 of the formation to which this bowlder belonged is well preserved 

 in the specimen and is indicated by a slight lithologic change and a 

 more marked faunal change. Crinoid fragments and pieces of 

 bryozoans are to be found in all parts of the mass, but the former 

 are much more abundant on one side and the latter on the other, 

 and the dividing line is plainly marked. At first an attempt was 

 made to keep the faunas of the two sides separate, but it was soon 

 found that specimens of practically all the species represented were 

 found on both sides of the bowlder. The two faunas are therefore 

 treated as one. 



Fauna of Bowlder 102 — Locality i 

 Coelenterata 



Amplexus fragilis White & St. John 

 Monolipora beecheri Grabau 

 Gen. ? sp. ? 



Echinodermata 



Codaster sp. nov. 



Platycrinus hemisphericus M. & W. 



Platycrinus pratteni Worthen ? 



Platycrinus sp., at least five species, probably more 



Dichocrinus scilulus Hall ? 



Dichocrinus sp. 



Fragments 



Molluscoidea 



Fenestetta cestriensis Ulr. ? 



Fenestella cingulata Ulr. 



Fenestetta compressa Ulr. 



Fenestella compressa var. elongata Cumings 



Fenestetta compressa var. nododorsalis Ulr. 



Fenestella exigua Ulr. ? 

 ^Fenestella filistriata Ulr. 

 ^Fenestella filistriata Ulr. ? 



Fenestella funicula Ulr. 



Fenestella limitaris Ulr. 



Fenestella multispinosa Ulr. 



Fenestella multispinosa Ulr. ? 



Fenestella regalis Ulr. 



Fenestella rudis Ulr. 



