1466 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Homotrypa subramosa insignis (Ulrich). 



Homotrypella hospitalis crassa (Ulrich). 



Homotrypella mundula Ulrich. 



Homotrypella? ovata Ulrich. 



Hormotoma bellicincta (Hall). 



Hormotoma gracilis (Hall). 



Hormotoma{?) major (Hall). 



Hormotoma salteri (Ulrich). 



Hormotoma trentonensis Ulrich and Scofield. 



Illxnus americanus (Billings). 



Jschadites iowensis (Owen). 



Isotclus gigas? Dekay. 



Isotdus maximus? Locke. 



Jonesella obscura Ulrich. 



Kokenospira costalis Ulrich and Scofield. 



Lichenaria minor Ulrich. 



Licrophycus ottawaense Billings. 



Lingula? canadensis Billings. 



Lingula (Palxoglossa) deflecta (Winchell and Schu- 

 chert). 



Lingula {Palxoglossa) hurlbuti (N. H. Winchell). 



Lingula (Pseudolingula) iowensis (Owen). 



Lingula riciniformis Hall. 



Lingula riciniformis galenensis Winchell and Schu- 

 chert. 



Lingulasma galencnse Winchell and Schuchert. 



Liospira americana Billings. 



Liospira angustata Ulrich. 



Liospira progne Billings. 



Lophospira bicincta Hall. 



Lophospira elevata Ulrich and Scofield. 



Lophospira fillmorensis Ulrich and Scofield. 



Lophospira medialis Ulrich and Scofield. 



Lophospira perforata Ulrich and Scofield. 



Lyrodesma cannonense Ulrich. 



Maclurites crassws macro, (Ulrich and Scofield). 



Mxlonoceras neleus (Hall). 



Mesotrypa discoidea Uhich. 



Mesotrypa quebecensis (Ami). 



Mesotrypa? rotunda Ulrich. 



Mitoclema? mundulum Ulrich. 



Modiolodon patulus Ulrich. 



Modiolopsis mytiloides Hall. 



Modiolopsis nana Ulrich. 



Modiolopsis oweni Ulrich. 



Monotrypa intabulata Ulrich. 



Monticulipora arborca Ulrich. 



Monliculipora? cannonensis Ulrich. 



Nematopora conferta Ulrich. 



Nematopora consueta Bassler. 



Nematopora granosa Ulrich. 



Nematopora ovalis Ulrich. 



Nileus vigilans (Mock and Worthen). 



Odontopleura parvula (Walcolt). 



Oncoceras douglassi Clarke. 



Oncoceras cxiguum (Billings). 



Oncoceras minnesotense Clarke. 



Ophiletina sublaxa sequens Uliich and Scofield. 



Orthoceras beltrami Clarke. 



Orthoceras junceum Hall. 



Orthodesma schucherti Ulrich. 



Oxydiscus subacutus Ulrich. 



Pachydictya acuta (Hall). 



Pachydictya clegans Ulrich. 



Pachydictya magnipora Ulrich. 



Pachydictya pumila Ulrich. 



Pachydictya pumila sublata Ulrich. 



Parastrophia hemiplicata Hall. 



Parastrophia hemiplicata rotunda Winchell and 

 Schuchert. 



Parastrophia scofieldi (Winchell and Schuchert). 



Pasceolus globosus Billings. 



Petrocrania ulrichi (Hall and Clarke). 



Phamopora incipiens Ulrich. 



Pholidops trentonensis minor Wrachell and Schu- 

 chert. 



Phragmolites dyeri cellulosus (Ulrich and Scofield). 



Plectambonites gibbosus Winchell and Schuchert. 



Phx-tambonitcs minnesotensis (Sardeson). 



Plectambonites sericcm Sowcrby. 



Plectorthis plicatella trentonensis Foerste. 



Plethocardia suberccta Ulrich. 



PI eurocy stiles squamosus Billings. 



Podolithus anomalocrinus Sardeson. 



Podolithus dendrocrinus Sardeson. 



Podolithus eucheirocrinus Sardeson. 



Poterioceras apertum Whiteaves. 



Prasopora affinis Foord. 



Prasopora grandis (Ulrich). 



Prasopora insularis Ulrich. 



Prasopora insularis fillmorensis Ulrich. 



Prasopora oculata Foord. 



Prasopora sclwyni (Nicholson). 



Prasopora simulalrix Ulrich. 



Primitia micula Ulrich. 



Primitia uphami Ulrich. 



Prolobella striatula Ulrich. 



Protarxa vetusto (Hall). 



Psiloconcha minnesotensis Ulrich. 



Pterygometopus achates (Billings). 



Pterygometopus callicephalus (Hall). 



Pterygometopus schmidti Clarke. 



Rafinesquina alternata (Emmons). 



Pafinesquina dcltoidea (Conrad). 



Raphistomina rugata Ulrich and Scofield. 



Receptaculites oweni Hall. 



Rhinidictya minima Ulrich. 



Rhinidictya minima modesta Ulrich. 



Rhinidictya mutabilis (Ulrich). 



Rhynchotrema increbescens (Hall). 



Rhynchotrema increbescens laticostatum (Winchell 

 and Schuchert). 



Rhytimya sinuata Ulrich. 



Saffordia modesta (Ulrich). 



Salpingostoma sculptile Ulrich and Scofield. 



Sccnclla affinis Ulrich and Scofield. 



Scenclla affinis obsolcta Ulrich and Scofield. 



Scenclla radialis Ulrich and Scofield. 



Schizotreta pelopea (Billings). 



Schmidtella affinis Ulrich. 



Schmidtella incompta subxqualis Ulrich. 



Sinuitcs cancelhitus (Hall). 



Sinuiles canccllatus trentonensis (Ulrich and Sco- 

 field). 



Sphenolium striatum Ulrich. 



Stomatopora arachnoidca (Hall). 



Streptelasma corniculum Hall. 



Strophomena billingsi Winchell and Schuchert. 



Strophomcna cmaciata Winchell and Schuchert. 



Strophomena scofieldi Winchell and Schuchert. 



Strophomcna trentonensis Winchell and Schuchert. 



Strophomena trilobata (Owen). 



Slrophostylus tcxtitis Ulrich and Scofield. 



Subulites pergracilis Ulrich and Scofield. 



