846 E. O. ULRICH CORRELATIONS OF CHESTER FORMATIONS 



of other crinoids that were determined by Mr. Springer as indistinguish- 

 able from supposed Eenault species and were so listed in my 1917 report. 

 To that list I can now add another species, namely, the very peculiar 

 Catilliorinus carpenteri (Wachsmuth and Springer). 



The common occurrence of Platycrinus huntsvillce in association with 

 supposed Eenault species of crinoids, hence with unquestioned Chester 

 fossils, is thus established as an indisputable fact in Alabama; and it is 

 probably true, as I have claimed, also for western Kentucky; but I wish 

 to record the corroborating fact that the crinoid fauna previously men- 

 tioned as from the Upper Sainte Genevieve in Owen County, Indiana, is 

 precisely the same fauna, including the Platycrinus, that was collected 

 long ago in the vicinity of Huntsville, Alabama, by Wachsmuth and his 

 associates and which was stratigraphically fixed by my associates and me 

 during the past summer. That this Upper Ohara fauna retains its char- 

 acteristic aspect from Huntsville, Alabama, to Owen County, Indiana, is 

 shown by the following lists : 



The following fossils were obtained from cherty lenses just beneath 

 the main crinoid zone near the top of the Sainte Genevieve limestone, 8 

 miles south of Huntsville, Alabama : 



Belemnospongia n. sp. Productus inflatus 



Zaphrentis (TriplophyUum) spinulo- Echinoconchus genevievensis 



sum Spirifer breckenridgensis 



Michelinia aff. princetonensis, but Spirifer cf. pellwnsis and increbes- 



nearer an uh described Middle ecus 



Chester variety Dielasma arkansanum 



Fenestella cestriensis 

 Chonctes chesterensis var. grandis n. 



var. Larger than the typical va- 

 riety, the hinge line commonly an 



inch in length, with 7 or 8 spines 



on each side of beak ; striae fine, 



about 145 on each valve ; ventral 



valve with broad shallow median 



sinus. 



The Chester aspect of this small faunule is striking. It is suggested 

 particularly by the Brachiopoda. The Chonetes is abundant. 



Lists of fossils from the Huntsville area. — The following fossils were 

 obtained from a shaly limestone (crinoid beds) near the top of the Sainte 

 Genevieve limestone, in hills 8 miles south of Huntsville, Alabama: 



Concentrically lined disk-shaped Productus ovatus 



sponge. Productus inflatus 



Triplophyllum spinulosum Diaphragmus montesana 



Mesoblastus glaber Pustula genevlevensis 



