fossils of the clinton group. 595 



TriIvObites, Mollusks and Brachiopods of the Clinton Group 

 in Ohio and Indiana, 

 trilobita. 

 Acidaspis Ortoni, Foerste. 

 Acidaspis brevispinosa, sp. nov. 

 . Proetus determinatus , Foerste. 

 Cyphaspis CHntonensis, Foerste. 

 Iitcenus Daytonensis, Hall and Whitfield. 

 Harms ambigiius, Foerste. 

 Illcenus insignis, Hall. 



Illeenus Madisonianus, Whitfield, (var. elongatus, var. depressus.) 

 Calymene Vogdesi, Foerste. 

 Calymene Niagarensis, Hall, 



Ceraurus (Pseudosphtsrexochus) CHntonensis, sp. nov. 

 Sphcsrexochus pisum, sp. nov. 

 Lie has brtviceps, Hall. (var. CHntonensis) 

 (Lichas phlyctainoides? Green.) 

 Phacops trisulcatus, Hall. 

 Dalmanites Werthneri, Foerste. 

 Encrinurus puncta us, Wahlenberg. 



OSTRACODA. 



Elpe Ulrichi, sp. nov. 



ANNELIDA. 



Cornulites, distans, Hall. 



CEPHALOPQDA. 



Gomphoceras Ortoni sp. nov. 

 Cyrtoceras Clintonense^ sp. nov. 

 Gyroceras (Glyptoceras) subcompressum, Beecher. 

 Gyroceras (Glyptoceras) Eatownse, Claypole. 

 Orthoceras (Actinoceras) Youngi, i Foerste. 

 Orthoceras (Actinoceras) clavatum, Hall. 

 Orthoceras (Actinoceras) lati-nummulatum, Foerste. 

 Orthoceras (Actinoceras) turgido-nummulatum, Foerste. 

 Orthoceras (Actinoceras) Daytonense, Foerste. 

 Orthoceras (Eu- Orthoceras) rectum, Worthen, var. Junius, Foerste. 

 • Orthoceras (Eu-Orthoceras) ignotum, Foerste, variety erraticum var. nov. 

 Orthoceras (Eu-Orthoceras) Hanover ense, Foerste. 

 Orthoceras (Eu-Orthoceras) virgulatum, Hall ? 

 Orthoceras (Cycloceras) inceptum, Foerste, var acceleratum. 

 Orthoceras (Cycloceras) Nova-Carlislense, Foerste. 

 Orthoceras (Spyrocerasf), spyraceroides sp. nov. 

 Orthoceras (Styrocerasf) Jamesi, Hall and Whitfield. 



