239 Devonian of Southern Indiana hi 



Carboniferous faunas appear immediately above the New Al- 

 bany shale in Indiana and Kentucky, but they have nowhere 

 been found in it by the writer.* The following is a list of the 

 rather meagre fauna at present known from the New Albany 

 shale in Indiana and central Kentuckyf : 



Barroisella subspatulata, Cardiopsis s'^., Chonetes lepidus, Chon- 

 etes scihihis, Discina viiiintaf , Discina triincata, Lciorhynchiis lim- 

 itare, Leiorhynduts quadricostahivi, Lingula ligea^ Lingtila spat- 

 ?i/ata, Pa7ienka radia7isf , Styliola Ji^snrella. 



A summary of the evidence which these species afford as to the 

 age of the fauna shows that the range of three of them is from 

 the Marcellus or Hamilton to the Chemung and of one, from the 

 Hamilton to the Portage, inclusive. Leaving out of considera- 

 tion Panenka radiayis and Discina rnhiuta, which have been 

 doubtfully identified, and Barj^oisella subspatulata, which is not 

 known in the New York faunas, we find but one of the species 

 limited to beds below the Genesee. Of the others, one is common 

 to the Portage and the Genesee; another ranges throughout the 

 Hamilton, while three are characfteristic Genesee species. The 

 weight of the evidence seems therefore in favor of the equivalence 

 of the faunas of the Genesee and the New Alban}' shale. 



Probably no other species occurs in such abundance in the New 

 Albany shale as Styliola fissurella. The fauna may be conven- 

 iently designated as the Styliola fissurella zone of the Devonian 

 in this series of se(!;l;ions. 



*Prof. Williams reports a Carboniferous fauna in the Black shale at Ir- 

 v-ine, Ky. Am. Jr. Sci., 4th sen, vol. 3, p. 398. 



fA few species not included in this list have been reported by Girt)' 

 from the Black shale of eastern Kentucky. Am. Jr. Sci., vol. 6, 4th ser., 

 pp. 384-395- 



