CORRELATION OF THE DEVONIAN FAUNAS 633 
Corniferous limestone fauna, as seen in Indiana, Ohio, and New 
York. The conspicuous species in the fauna are the large and 
robust Strophodontas, the Atrypa reticularis of the large, robust 
form so common at the falls of the Ohio, Spurifer varicosus, 
Spirifer duodenaria, Orthis (Schizophoria) propinqua, Paracyclas 
elliptica, Conocardium cuneus, Lichas (Ceratolichas) cf. grypes, 
Dalmanites cf. calypso cf. erina, etc. Nowhere in the western 
interior province does a fauna at all allied to this one occur, 
but it is identical with the Corniferous fauna of the eastern 
province. 
The third division may be called the Gomphoceras zone, and 
includes only the bed numbered 5A*. It is characterized by 
numerous specimens of several large, robust species of Gompho- 
ceras. The specimens as they occur on the surface of the out- 
crop are generally too imperfect for certain identification, but 
are of a general type of the genus which is common in both the 
Corniferous and the Hamilton faunas. The associated species 
are nearly all identical with those in the Corniferous fauna 
below. 
The fourth division is the Chonetes yandellana zone, 5A™. 
The bed is made up almost exclusively of multitudes of speci- 
mens of this one species, all the others recorded being rare or 
uncommon. 
The fifth division is the Chonetes littont? zone, 5A*. It is 
similar to the Chonetes yandellana zone in being made up almost 
entirely of great numbers of individuals of a single species of 
Chonetes. C. littont, with three other species of the same genus, 
was originally described from this locality by Norwood and 
Pratten, but their descriptions and figures are so imperfect that 
it is difficult to recognize their species. In the faunas of the sec- 
tion there are three conspicuous Chonetes zones, each containing 
exclusively a single species of the genus. Three of Norwood 
and Pratten’s species, C. macluret, C. martini, and C. tuomyt, may 
be certainly identified as different stages of a single species, C. 
coronatus, which characterizes the uppermost Chonetes zone. The 
chances are, therefore, that their fourth species, C. /ittoni, is 
