76 Cincinnati Society of Natural History. 
PELECYPODA. 
Byssonychia radiata (Hall). (c) Ctenodonta perminuta Ulrich. 
Clidophorus fabulus (Hall). Pterinea demissa Conrad (c) 
Ctenodonta obliqua (Hall). 
GASTROPODA. : 
Coleolus iowensis James. Cyrtolites ornatus Conrad. (c) 
Conularia formosa Miller and Hyolithes parviusculus Hall 
Dyer. Lophospira bowdeni (Safford).(c) 
Cyclora depressa Ulrich. tropidophora (Meek). 
‘“ hoffmanni Miller. Microceras inornatum Hall. (c) 
s minuta Hall. (c) Protowarthia cancellata (Hall).(c) 
“  parvula Hall. Shizolopha moorei Ulrich. 
CEPHALOPODA. 
Cameroceras sp. (proteiforme Hall ?). 
VERMES. 
Cornulites corrugatus(Nicholson). Nereidavus varians Grinnell. 
. sterlingensis (Meek Serpulites dissolutus Billings. 
and Worthen). 
CRUSTACEA. 
Acidaspis cincinnatiensis Meek, Calymmiene callicephala Green. (c) 
and varieties. Isotelus gigas DeKay. 
Aparchites minutissimus (Hall). : maximus Locke. 
Bollia persulcata Ulrich. (c) Lepidocoleus jamesi (Hall and 
Bythocypris cylindrica (Hall). Whitfield. 
; Ulrichia nodosa (Ulrich). (c) 
POSITION UNCERTAIN. 
Arthraria biclavata Miller. Pasceolus globosus Billings. 
Bythotrephis gracilis Hall. Rusophycus bilobatum Vanuxeni. 
a gracilis-crassa Hall. se pudicum Hall. 
Mt. Hope or Amplexopora septosa Beds. 
Overlying the Utica are several heavy, rather irregularly 
bedded limestones roughish in character. The layer of lime- 
stone which usually caps the Utica shale varies from eight to 
sixteen inches in thickness. It is a mass of fossils, mainly 
Dalmanella multisecta; the reddish specimens of this little 
shell sprinkling its upper surface render it an easily recog- 
nized stratum. ‘This and several succeeding limestone layers 
are sometimes quarried but do not afford a very satisfactory 
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