DUHMBERGIA [Ctenobolbina duhmbergi Opik 1937,p.96,pl.4,f.10, 
11,pl.6,f.5] Schmidt 1941,p.39 [as Subgenus of 
Ctenobolbina; Hollinidae-Tetradellinae by Schmidt] 
Ordovician, Esthonia. [=Piretella, Ctenobolbina 
duhmbergi Spik, being a young instar of Piretella 
margaritata Spik, by Henningsmoen 1953,p.218,219.] 
ECTODEMITES [E. primus] Cooper 1941,p.49 [Kirkbyidae-Amphis- 
sitinae by Cooper] Mississippian of Illinois [as 
a subgenus of Amphissites by Polenova 1952,p.117] 
ECTOPRIMITIA [Primitia corrugata Krause 1892,p.386,pl.2l, 
f.12] Bouéek 1936,p.45 [As subgenus of Haplop- 
rimitia, Primitiidae-Primitiinae by Boucek; 
Eurychilinidae-?Euprimitiinae by Henningsmoen 
1953,pe251,272] Ordovician drift, Germany. 
EDITIA [E. elegantis] Brayer 1952,p.170, [Kirkbyidae by 
Brayer] Mississippian of Missouri. 
ELLESMERIA [E. ovata] Tolmachoff 1926,p.35 [Barychilinidae 
by Bassler & Kellett 193h4,p.47,296] Devonian, 
Ellesmereland, Arctic America. 
ELLIPSELLA [E. obliqua] Coryell and Rogatz 1932,p.390 
[Cytheridae by C&R; Kloedenellidae by Bassler and 
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