818 E. O. ULRICH CORRELATIONS OF CHESTER FORMATIONS 



above the "Lower Ohara," the above list is an eminently characteristic 

 Shetlerville association. 



COMPARISONS AS TO RELATIVE ABUNDANCE AND QUALITY OF EVIDENCE 



Instances where Weller makes it appear that he has thoroughly inves- 

 tigated and considered all the evidence extant, whereas mv Kentuckv 

 report contains evidence that opposes his conclusions and which he either 

 overlooked or thought it best to ignore as untrustworthy, are numerous. 

 For most of the Chester formations that he describes in the report on 

 Hardin County the lists of fossils published by me in 191? comprise 

 more species than he cites. Thus my list of Fredonia fossils 10 mentions 

 151 species from localities in western Kentucky. His list from the same 

 limestone in Hardin Comity mentions only 54 species. Of my list of 

 151 species of Fredonia fossils 50 are marked as ranging into the Upper 

 Ohara and 56 as represented by close or undistinguished descendants in 

 the higher Gasper limestone. These upward-ranging Fredonia species 

 are almost entirely ignored by Weller, and regarding the few that he 

 takes into consideration at all he implies that, as he himself has not 

 found them in the Fredonia, I must be mistaken either in the identifica- 

 tion of the fossils themselves or in the age determination of the beds in 

 which they were found ; or if neither of these possibilities apply, then I 

 must have carelessly mixed the fossils from different zones and forma- 

 tions. That any of these three conditions may have obtained in rare 

 instances I will admit frankly enough; but that I was ever either careless 

 in locating my fossil collections or often in error in recognizing par- 

 ticular stratigraphic zones I can not concede, nor do I believe that many 

 geologists would accuse me of such shortcomings. Why, it is on the 

 quality of precision in the location of fossil zones and in their recogni- 

 tion from place to place that whatever of pride I have had in my work in 

 geology mainly rests. 



My 1917 list of the fossils found by me in the Upper Ohara also ex- 

 ceeds considerably the number of species credited to the same beds by 

 Weller. This list does not include all of the species in my collections 

 from these beds, but it comprises 93 of them, of which not more than 5, 

 two of even these being doubtfully identified in lower zones, are cited as 

 confined to zone 4, which Weller now refers to the Eenault formation. 

 This leaves 88 against 72 named in Weller's list of the fossils recognized 

 by him in his Shetlerville formation, which corresponds to my Ohara 

 zones 2 and 3. The 16 or more species in my list that are not given in 

 Weller's are all included among the 54 Upper Ohara species that I have 



10 Op. fit., pp. 133 to 137. 



