1360 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



dlsculus Bellorophon, Oxydiscus. 



discus (um) Favosites, Ophileta, Rhom- 

 bodictyon. 



disjunctus (a) Cyrtolites, Eccyliopte- 

 rus, Ophileta, Strophostylus cycloato- 

 mus. 



dispandum Streptelasma. 



dispar Actinopteria, Eophyton, Scoli- 

 thua, Trochonema. 



disparilis Atrypa, Atrypina, Ccelospira, 

 Leptocoelia, Orthia, Trematospira. 



dissimilaris Cladograpaus, Dicrano- 

 graptus, Diplograptus. 



dissimilis Corynotrypa, Frammia, Sto- 

 matopora. 



dissolutus Serpulites. 



distans Actinoceraa tenuifilum, Araeh- 

 nophyllum (Strombodes) mamillare, 

 Cornulites, Eccyliomphalus, Endoceras, 

 Graptolithns (Prionotus) sedgwickii, 

 Heliolitea subtubulatus, Monograptus, 

 Nemagraptus gracilis, Ormoceras ten- 

 uifilum, Rafinesquina, Tentaculites. 



distincta (um) Ceramoporella, Cyatho- 

 phyllum, Huronia. 



distorta Carpomanon stellatimsulcatum, 

 Escharina. 



divaricans Palseophyllum Streptelas- 

 ma. 



divaricatus (a) Buthotrephis, Dicello- 

 graptus, Dicellograptus moffatensis, 

 Dichograptua, Dicranograptus, Didymo- 

 grapaus, Didymograptus, Graptolithus, 

 Helopora, Inocaulis, Rhombopteria 

 divaricata, Sedgwickia, Technophorua, 

 Whiteavesia. 



divergens Amphigraptua , Coenograptus 

 (Pleurograptus, Pterograptua), Colum- 

 naria, Dendrograptua, Graptolithus, 

 Hallia Parastrophia, Pentamerus. 



diversus (a) Callopora, Clitambonites, 

 Dermatostroma, Orthisina. 



dividuum Eridophyllum. 



divisa Hallia. 



dixonensis Maclurea bigabyi, Macluri- 

 tes bigabyi, Receptaculitea, Subulites, 

 Vanuxemia. 



dixoni Orthostrophia, Strophonella. 



docens Lioapira, Pleurotomaria. 



dodgei Schizambon . 



dolatus (a) Lingula, Obolua. 



dolomlticus (a) Orthotropia, Sphserocys- 

 titea. 



donaciformis Ctenodonta, Nucula, Tel- 

 linomya. 



doneti Strophomena . 



dorsicornis Leperditella, Leperditia, 

 Primitia. 



douglassi Oncoceras. 



dowlingi Gyronema . 



downingise Phacops, Phacopidella. 



dresbachense Cyrtoceras. 



drummondense Clathrodictyon. 



drummondi Omphyma, Orthoceras. 



dryope Eotomaria, Pleurotomaria. 



dubiaf ormis Ctenodonta . 



dubius (a, um) Ampheristocrinua, Atry- 

 pa, Bathyurus, Calymene, Codylocri- 

 nua, Crania, Ctenobolbina, Ctenodonta, 

 Dendrograptus, Dianulites, Diplotrypa, 

 Gilbertaocrinites, Glossina, Goniophora, 

 Hemitrypa, Homotrypella, Hyolithes, 

 Lampterocrinus, Lichenocrinus, Lin- 

 gula, Lyonsia, Mesoplaeaster, Metopto- 

 ma, Modiolopsis, Monticulipora, Palae- 

 aster, Palaeoglosaa, Periechocrinua, Pe- 

 ronopora, Phyllograptua, Platycolpus, 

 Platycrinua, Protorhyncha, Ptilodic- 

 tya, Pycnosaccus, Reticularia, Rhyn- 

 chonella, Rhynchorthoceras, Spirifor, 

 Stenotheca, Tellinomya, Troostocri- 

 nua. 



dufresnoyi Actinoceras. 



dumalis Callopora, Hallopora. 



dumosa Homotrypa, Stictoporella. 



dunleithense Cyrtoceras 



duplicate (um) Cameroceras, Endoceras, 

 Gyronema, Primitia, Trochonema. 



duplicimuratus Schizambon. 



duplicostatum Gyroceras. 



durhamensis Eotomaria, Labechia, Mo- 

 nomerella, Pleurotomaria, Poleumita, 

 Polytropis. 



duryi Beyrichia, Ctenobolbina. 



duseri Orthoceras. 



dychei Leptotrypa, Modiolopais, Monti- 

 culipora, Monticulipora (Monotrypa), 

 Prioniodua, Stigmatella. 



dyeri Ancistroceraa, Aaaphoidichnua, 

 Conradella, Crania, Cyrtolites, Dendro- 

 crinus, Glyptocrinus, Holocystites, Li- 

 chenocrinus, Orthoceraa, Palseaster, 

 Phragmolites, Poteriocrinites, Promo- 

 palaeaster, Trematia, Trocholitea. 



eatonensis (e) Cyrtoceraa (Glyptoceras), 

 Glyptodendron, Trigonodictya. 



