FIELD INVESTIGATIONS IN 1 92 1 843 



collected. We found the same kinds of Pentremites, shells, and corals — 

 one of the last so far observed only at this place — in precisely the same 

 kind of rock as in the collection donated to the Museum, but we found 

 no heads of crinoids and only a few pieces of their columns. Evidently 

 the collection made here by Mr. Schaefer represented, as is the rule with 

 crinoids, merely a small and little disturbed original colony, the riches 

 of which were completely exploited at the time of its discovery by the 

 collector. 



Upper Ohara fossils in Sainte Genevieve limestone south of Somerset, 

 Kentucky. — Proceeding with the discussion of the sections, the feature 

 that I wish particularly to bring out in the one to the south of Somerset, 

 Kentucky, is the fact that here at least the Sainte Genevieve limestone 

 includes beds at the top that contain unquestioned and, indeed, so far as 

 present knowledge goes, unquestionable Upper Ohara fossils. Of the 

 appended list of species found in these beds it doubtless will suffice to 

 mention Talarocrinus dewolft, T. buttsi, Pentremites princetonensis, 

 P. immaturus, P. butt si, and Mesoblastus glaber. Four of these six spe- 

 cies are wholly unknown to me in beds older than the Upper Ohara, and 

 the remaining two are constantly associated with them in western Ken- 

 tucky and southern Illinois. 



The following fossils were taken from top beds of the Sainte Genevieve 

 limestone in a quarry at Cedar Grove and in cuts one-fourth to one-half 

 a mile north, along the Cincinnati Southern Eailroad south of Somerset, 

 Kentucky : 



Triplophyllum spinulosum Girtyella indianensis 



T. spinulosum? small var. G. brevilobata 



Pentremites princetonensis- — by the Productus pileiformis 



million Diaphragmus montesana 



P. pulchellus Composita trinuclea 



P. buttsi (young) Cleiothyridina sublamellosa 



P. immaturus ? Spirifer cf. bifurcatus 



Mesoblastus glaber — very abundant S. cf. breclienridgensis 



Dizygocrinus persculptus Bellcrophon cf. sublcevis 



Talarocrinus buttsi Straparollus quadrivolvis 



T. dewolfi, Euomphalus similis 



Dichocrinus cf. girtyi, with two long Pleurotomaria aff. subglobosa 



basals, flaring at junction with . P. sp. 



column Orthoccras sp. — long, slender form. 

 Dielasma sp. 



This fossil evidence, I venture to say, will be accepted as substantiat- 

 ing the opinion expressed by me in 1917, that in its eastward and south- 

 ward extension from western Kentucky the shaly upper beds of the Sainte 

 Genevieve are gradually replaced by thinner deposits of purer and largely 



