invalid, as Ctenentoma is a single internal mold 
of an indeterminate Steusloffia, and at best it 
is younger and a synonym of Bassleratiinae. 
CTENENTOMA [Entomis umbonata Steusloff 1894,p.778,p1.58, 
f.20] Schmidt 1941,p.35 [Hollinidae-Ctenentominae 
by Schmidt; invalid = internal mold of some 
Steusloffia, perhaps S. polynodulifera or S. 
lineata (Krause) by Henningsmoen 1953,p.22h,267] 
Ordovician drift, Germany. 
CTENOBOLBINA [Beyrichia ciliata Emmons 1855,pe2l19, text 
fig.74c] Ulrich 1890,p.108 [Beyrichiidae by 
Ulrich, Hollinidae-Tetradellinae by Schmidt 191, 
pe 373; Sigmoopsiidae-Sigmoopsiinae by Henningsmoen 
1953,p-211,239,266] Ordovician, Ohio. 
CTENOBOLBINELLA [C. carinata] Kummerow 1953,p.39 [Beyrichiidae 
by Kummerow] Devonian, Germany. 
CTENOCYPRINA Daday 1900,p.125,304, a Tribe of subfamily 
Cyprinae, with subtribes Zygopsida and Synopsida, 
for genera: Centrocypris, Cypris, Eucypris, 
Herpetocypris, Cyprois, Cypricercus.e 
CTENOLOCULINA [Tetradella cicatricosa Warthin 1934,p.209, 
pl.l,f.4-6] Bassler 1941,p.22 [Tetradellidae by 
Bassler; Hollinidae by Pokorny 1950,p.526, by 
39 
