822 E. O. ULRICH CORRELATIONS OF CHESTER FORMATIONS 



the Upper Ohara and Gasper limestones, and therefore to the Chester 

 group, which are held by him in opposition to those previously published 

 by me. His views on these questions can not be successfully maintained 

 if such fossils as Platycrinus huntsvillce, Dizygocrinus superstes, and 

 Pugnoides ottumwa, which he regards as entirely confined to and char- 

 acteristic of the Sainte Genevieve beds beneath the Upper Ohara, actually 

 do range upward into the Upper Ohara, as claimed by me. But I have 

 known for more than 30 years that these three fossils are not strictly 

 confined to pre-Upper Ohara zones in western Kentucky, where I found 

 them well up in the Ohara at three places — in Caldwell, Crittenden, and 

 Livingston counties. Moreover, I can now add that the two crinoids, 

 together with Globocrinus, are exceedingly abundant, though very locally 

 distributed, in the vicinity of Huntsville, Alabama, in beds now definitely 

 correlated with the Upper Ohara. 



But we know of other occurrences of this Upper Ohara crinoid fauna 

 which may be recognized even when the Platycrinus is lacking, as happens 

 locally in southeastern Kentucky. Among the most important of these 

 occurrences is one in Owen County, Indiana, where an excellent but very 

 local development of this fauna, including Platycrinus penicillus, was 

 found. It occurs also in Monroe County, Illinois, near Burksville, in a 

 shaly bed that was and may yet be referred by Weller to his Renault 

 formation. I shall have more to say of these occurrences and also give 

 lists of fossils on following pages. 



Regarding the presence of both Platycrinus penicillus and Pugnoides 

 ottumwa in beds regarded by me as corresponding to some part of the 

 Upper Ohara or possibly to an even younger horizon than the Shetler- 

 ville, I shall add here only a few words concerning recent observations 

 in Sainte Genevieve County, Missouri, namely : During the past summer 

 Mr. Butts and I found these two species, together with a pentremite of 

 the type of P. butt si, which is 'a highly characteristic Upper Ohara fossil, 

 a short distance south of Aux Yases River, in limy shale making the 

 upper 5 feet of the Sainte Genevieve, as delimited by me. This. observa- 

 tion was quite in harmony with views previously held as to the compo- 

 nents of this formation in Sainte Genevieve County: but the discovery, 

 at the same time and place, of a limestone and shale horizon within the 

 Aux Vases sandstone, out of which we procured a fauna of -11 species, 

 among which again are bases and columnals of Platycrinus huntsvillm 

 and typical Pugnoides ottumwa, was altogether unexpected. In fact, it 

 was distinctly shocking to my idea of the proprieties to find that these 

 excellent and elsewhere steadfast Sainte Genevieve guide fossils had here 

 apparently transgressed their allotted ranges. But what can the dis- 



