166 
The American Geologist. 
March, 1893 
Pal.eozoic. 
^Iesozoic. 
C.KNOZOIC. 
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Eiide.sia, King. 

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Lyra, Cnnibcrland. 
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Aulacotiiyris, Donville. 
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Oanierothyris, Bittner. 
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Epicyrt.a, "Deslong. 
Cincta, (iuenstedt. 
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Antiptychina, Zittel. 
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