1454 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Ctenodonta contracta Salter. (Le.) 



Ctenodonta costata Branson. (A.) 



Ctenodonta cuneiformis Ulrich. (D.) 



Ctenodonta gibberula Salter. (Le., D., L., P.) 



Ctenodonta hamburgcnsis (Walcott). (D.) 



Ctenodonta, inflata (Hall). (P.) 



Ctenodonta jersey ensis Weller. (New Jersey.) 



Ctenodonta logani Salter. (Le., P.) 



Ctenodonta longa (Ulrich). (D.) 



Ctenodonta medialis Ulrich. (D., A.) 



Ctenodonta nasuta (Hall). (P. D., A., Le., L.) 



Ctenodonta nasuta robusta Ulrich. (P.) 



Ctenodonta nitida (Ulrich). (D.) 



Ctenodonta ovata (Hall). (P.) 



Ctenodonta oviformis Ulricji. (D., A.) 



Ctenodonta planodorsata (Ulrich). (D.) 



Ctenodonta scofieldi Ulrich. (D.) 



Ctenodonta sodalis Ulrich. (D.) 



Cybeloides ella (Raymond and Narraway). 



Cydoccras Icsucuri (Clarke). (P.) 



Cycloceras nicolleti (Clarke). (P.) 



Cydoceras olorus (Hall). (P.) 



Cydocystoides antcceptus Hall. 



Cydonema Jiallianum Salter. (Le.) 



Cydora hoffmani Miller. 



Cydora minuta Hall. 



Cydora parvula (Hall). 



Tylindrocalia endoceroidea Ulrich. (L.) 



Cylindroccelia minnesotensis Ulrich. (D.) 



Cyphotrypa informis (Ulrich). (D.) 



Cyrtoceras camurum Hall. (P.) 



Cyrtoceras dunlcithense Miller and Gurley. (P.) 



Cyrtoceras eugium Hall. (P.) 



Cyrtoceras fcatherstonhaughi Clarke. (P.) 



Cyrtoceras houghtoni Clarke. (P.) 



Cyrtoceras macrostomum Hall. (P.) 



Cyrtoctras norwoodi Clarke. (P.) 



Cyrtoceras regulare Billings. (Le.) 



Cyrtoceras scofieldi Clarke. (P.) 



Cyrtoceras shumardi Clarke. (P.) 



Cyrtoceras simplex Billings. 



Cyrtoceras sinuatum Billings. (Le.) 



Cyrtoceras tenuistriatum Hall. (P., D.) 



Cyrtocerina(?) schoolcrafti Clarke. (D.) 



Cyrtocerina typica Billings. (Le.) 



Cyrtodonta affinis Ulrich. (D.) 



Cyrtodonta ampla Ulrich. (P.) 



Cyrtodonta billingsi Ulrich. (D., P., A.) 



Cyrtodonta canadensis Billings. (L., Le.) 



Cyrtodonta cingulata Ulrich. (D.) 



Cyrtodonta clochensis Foerste. (L.) 



Cyrtodonta glabclla (Ulrich). (D., P.) 



Cyrtodonta huronensis Billings. (L., D.) 



Cyrtodonta janesvillensis Ulrich. (P.) 



Cyrtodonta leucothca Billings. (Le.) 



Cyrtodonta obesa Ulrich. (D.) 



Cyrtodonta oviformis (Ulrich). (P.) 



Cyrtodonta persimilis Ulrich. (P.) 



Cyrtodonta rotulata Ulrich. (D.) 



Cyrtodonta spinifcra Billings. (Le.) 



Cyrtodonta subcarinala Billings. 



Cyrtodonta subovata Ulrich. (D., P.) 



Cyrtodonta tcnclla (Ulrich). (D.) 



Cyrtolitcs dilatatus Ulrich and Scofield. (D.) 



Cyrtolites retrorsus fillmorensis Ulrich and Scofield. 



(D.) 



Cyrtorizoceras isodorus (Billings). (L.) 

 Cyrtorizoceras minneapolis (Clarke). (P.) 



Cyrtospira bicurvata Ulrich. (L.) 

 Cyrtospira parvula (Billings). (Le.) 

 Cythcrella (?) rugosa (Jones). (Le., D.) 

 Cythcrella (?) subrotunda Ulrich. (D.) 

 Dalmanella hamburgcnsis (Walcott). (D., L.) 

 Dalmanella rogata (Sardeson). (D.) 

 Dalmanella testudinaria Dalman. (D.) 

 Dekayella prxnuntia Ulrich. (D.) 

 Dekayclla prxnuntia echinata Ulrich. (D.) 

 Dekayella prxnuntia multipora Ulrich. (D.) 

 Dekayclla prxnuntia nxvigera Ulrich. (D.) 

 Dcltayia trentonensis Ulrich. (D.) 

 Dcrmatostroma tyronensis Foerste. (L.) 

 Dicranella bicornis Ulrich. (D.) 

 Dicranclla marginata Ulrich. (D.) 

 Dicranella (?) simplex Ulrich. (D.) 

 Dicranella spinosa Ulrich. (D.) 

 Dictyoncma neenah Hall. (P.) 

 Dictyorhabdus priscus Walcott. (H.) 

 Dilobella typa Ulrich. (D.) 

 Dinobolus canadensis (Billings). (Le.) 

 Dinobolus magnificus (Billings). (Le.) 

 Dinorthis deflecta (Conrad). (P., L.) 

 Dinorthis pcctinella (Emmons). (D., Le.) 

 Dinorthis pcctinella sweenyi (N. H. Winchell). (D.) 

 Drepanella bigeneris Ulrich. (P.) 

 Drepandla crassinoda Ulrich. (L.) 

 Drepanella nitida (Ulrich). (L.) 

 Dystactospongia minor Ulrich and Everett. (L., P.) 

 Dystactospongia rudis Ulrich and Everett. (P.) 

 Eccyliomphalus undulatus (Hall). (P.) 

 Eccylioptcrus beloitensis Ulrich and Scofield. (L., 



P.) 



Echinosphxrites aurantium (Gyllenhal). (L., K.) 

 Ectomaria pagoda (Salter). (Le., P., D.) 

 Ectomaria prisca (Billings). (Le., P., L.) 

 Edriospongia basalis Ulrich and Everett. (P.) 

 Eich waldia subtrigonalis B illings. ( Le. ) 

 Encrinurus raricostatus Walcott. (P.) 

 Encrinurus rarus (Walcott). (P.) 

 Encrinurus trentonensis Walcott. 

 Encrinurus vannulus Clarke. (P.) 

 Endoceras gcmelliparum Hall. 

 Endoceras proteiforme Hall. (L., P., D.) 

 Endoceras rapax Billings. 

 Endoceras rotter mundi (Barrande). 

 Endoceras subannulatum (Whitfield). (P.) 

 Endoceras subccnlrale Hall. (W.) 

 Endoceras virgatum (Hall). (L.) 

 Endodesma gesncri (Billings). 

 Endodesma orthonotum (Meek and Worthen). (P.) 

 Endodesma undosum Ulrich. (P.) 

 Eoharpes pustulosus (Hall). 

 Eotomaria dryope (Billings). (D., P., A.) 

 Eotomaria supracingulata (Billings). (P., D.) 

 Eotomaria vicina Ulrich and Scofield. (P.) 

 Eridotrypa xdilis minor Ulrich. (D.) 

 Eriptychius americanus Walcott. (H.) 

 Escharopora angularis Ulrich. (D., P.) 

 Escharopora confluens Ulrich. (D.) 

 Escharopora? limitaris Uh?ich. (D.) 

 Escharopora subrecta (Ulrich). (D.) 

 Eurychilina longula Ulrich. (L.) 

 Eurychilina obcsa Ulrich. (L.) 

 Eurychilina reticulata Ulrich. (D., P.) 

 Eurychilina reticulata incurva Ulrich. (D.) 

 Eurychilina? subxquata Ulrich. (D.) 

 Eurychilina subradiata Ulrich. (D., P.) 



