upper Ordovician at Vevay, Ind. — Cumings. ^77 
Internally the species is seen in tang-ental and longitudinal 
sections to possess a structure closely similar to that of 
E. briareus (Nicholson sp.), from which it differs in the pres- 
ence in fair abundance of mesopores and in the general obli- 
quity of the diaphragms. The latter are more numerous in the 
mesopores. 
Locality : Vevay, Indiana, in the Dalmanella multisecta zone, asso- 
ciated with Dekayella obscura and Callof^ora onealli: Also at a sim- 
ilar level in the Kentucky bank of the Ohio near Lawrenceburg, Ind- 
iana. 
Yale University, Oct., igoi. 
