574 JOSIAH BRIDGE 



Bowlder 34 — Locality 6 



Fenestella rudis Ulrich ? 

 Archimedes grandis Ulrich 

 Productus ovatus Hall 

 Productus setigerus Hall 

 Rhynchopora beecheri Greger 

 Pseudosyrinx keokuk Weller 

 Camarophoria? sp. 



The exact correlation of these faunas is a difficult matter, since 

 nearly all of the species represented are common to both the Keokuk 

 and the Lower Warsaw. Archimedes owenanus is a common 

 Keokuk form, but it also appears in the Lower Warsaw. A. 

 grandis is less common, but its stratigraphic range is believed to be 

 about the same as that of A. owenanus. A. wortheni, which is so 

 characteristic of the Warsaw faunas, has not been found. These 

 faunas are probably best classed as Keokuk. No trace of the 

 recurrent fauna mentioned on page 573, has been found in any of 

 them. 



Missouri Bureau of Geology and Mines, Collection No. 5 



Fenestella serratula Ulrich 

 Fenestella serratula var. 

 Fenestella serratula Ulrich ? 

 Fenestella exigua Ulrich 

 Fenestella cf. exigua Ulrich 

 Fenestella exigua Ulrich ? 

 Fenestella sp. (3) 

 Polypora varsoviensis Prout 

 Polypora striata Cumings 

 Polypora spininodata Ulrich 

 Cystodictya lineata Ulrich 

 Hemitrypa sp. 

 Schizophoria sp. 

 Cypricardinia sp. 



This is apparently the youngest fauna which has been found 

 thus far. It is characterized by Polypora varsoviensis, the large 

 forms of which are found in great abundance in almost every 

 fragment. This species is common in the Warsaw and younger 

 beds. The specimens referred to Cypricardina sp. do not appear 

 to belong to the same species as the ones found in bowlder No. 102, 



