594 CLINTON R. STAUFFER 
northwestern shores of the Cincinnati island. ‘Taking up first the 
eastern shore, some forty outcrops of the Columbus have been 
visited and from these a total of nearly 175 distinct species have 
been collected, and many more reported by other collectors. The 
Columbus sea, in other words, was a veritable aquarium in which 
flourished one of the richest faunas that geological history records. 
Twenty-five sections, in which the Delaware limestone outcrops, have 
been examined, and from these a fauna of 71 species has been obtained. 
Among these we find the following relation: 25 Hamilton species; 
16 ‘‘Corniferous”-Hamilton species; 13 ‘‘Corniferous” species, of 
which perhaps 3 were originally described from the Delaware and at 
least do not occur in the Columbus limestone; 17 species (mainly 
Corals and Bryozoa) unidentified. Among the Hamilton species are 
such as, Lingula ligea Hall, Camarotechia prolifica Hall, Ambocelia 
umbonata (Conrad), Camrotechia sappho Hall, Spirifer audaculus 
macronotus Hall, Chonetes scitulus Hall, Gly ptodesma erectum Conrad, 
Nyassa arguia Hall, Grammysia bisulcata (Conrad), Sphenotus 
cuneatus (Conrad)—a collection of species which is hard to bring 
into the ‘‘Corniferous” (Onondaga) category. 
In northwestern Ohio the evidence is even stronger. Here the 
rocks rise very little above drainage level, hence a good section is 
hard to obtain, but along Ten Mile Creek and Auglaize River, at 
opposite ends of the line of outcrop, fair sections may be found. 
These two agree in all essentials, both lithologically and paleontologi- 
cally. Of the 27 feet, all quite fossiliferous, exposed along Ten Mile 
Creek, the lower 6 feet are soft, blue shales or shaly limestones, fol- 
lowed by 11 feet of soft and compact, blue to drab limestone, with a 
considerable amount of white chert, and capped by 10 feet of massive, 
compact, drab limestone. This section compares favorably with 
that of the Traverse of Michigan; in fact, it is but a continuation of 
the outcrops of that formation in Monroe County. 
Fifty-nine species were collected from this locality and range as 
follows: 33 Hamilton species; 10 ‘‘Corniferous”-Hamilton species; 
6 ‘“Corniferous” species; 10 species unindentified. Among the 
fossils from this section are the following characteristic Hamilton 
species: Favosites hamiltoniae Hall, Favosites nitella Winchell, H elio- 
phyllum halli Edwards and Haime, Strombodes alpenensis Rominger, 
