44 
The Ohio Naturalist. 
[Vol. XIII, No. 2, 
Dekayella ulrichi and some species of Eridotrypa is present. These 
fossils indicate the Eden age of the upper limestones in this 
Sheguindah section. The strata belong somewhere near the upper 
part of the Economy or the lower part of the Southgate section 
apparently. The thickness of this richly fossiliferous limestone 
and clay section may equal 20 feet, but only the lower 5 feet are 
well exposed along the Sheguindah road. 
One hundred and twenty-seven miles southeast of Little 
Current, along Workman’s brook, two miles east of Meaford, 
Trinucleus bellulus and Callopora sigillarioides are exposed about 
4 feet above lake level, and this is the reason for including the lower 
clay shales in the same section as the upper undoubted Eden 
limestones. In the Workman brook section, the Eden limestones 
become common about 75 feet above lake level, and that part of 
the Eden section which lies above this level may equal 50 feet. 
B. Wekwemikongsing Beds; Lorraine. 
Overlying the undoubted Eden beds, there is a series of strata 
containing Whiteavesia pholadiformis, Modiolopsis concentrica, 
Byssonychia radiata, Lyrodesma poststriatum , Clidophorus planul- 
atus, a large Ctenodonta belonging to the pectunculoides group, 
and a species of graptolite identified by Dr. Ruedemann as nearest 
to Diplogra ptus angustifolius mut. vespertinus from the Middle 
Lorraine of New York. In fact, the general aspect of these strata 
is Lorraine, since the lamellibranchs occur in siliceous limestones 
which weather into fine grained sandstones, as is the case in the 
typical Lorraine. 
In the lower strata belonging to the Wekwemikongsing section, 
as exposed south of Little Current, Dr. Ulrich identified Bythopora 
dendrina and Bythopora gracilis. From a corresponding horizon 
at the base of the Wekwemikongsing section, immediately south 
of the Richmond Clay Cliffs, on the eastern side of Cape Smyth, 
he identified Dckayia pelliculata in addition to the species named. 
The most interesting list, however, was obtained along Workman's 
brook, east of Meaford, where, in the 25 feet of strata underlying the 
Catazyga erratica horizon, Dr. Ulrich identified Callopora near 
dalei, Coeloclema sp., Dckayia appressa, Heterotrypa cf. inflecta , 
Leptotrypa ornata, and Percnopora compressa. These brvozoans 
suggest the middle Maysville age of these strata below the Cata¬ 
zyga erratica horizon. Dr. Ulrich placed them at approximately 
the Bellevue horizon. The base of the Wekwemikongsing beds 
on Workman creek appears to be about 50 feet below the Catazyga 
erratica horizon. 
The only bryozoans identified between the Catazyga erratica 
horizon and the base of the undoubted Richmond, with Catazyga 
headi, Cyclonema bilix, and Strophomena planumbona, 100 feet 
farther up, are Stigmatella cf. nicklesi. Discotrypa cf. elegans, and 
Spatiopora aspera. also suggesting Maysville age. 
