EARLY PALEOZOIC BRYOZOA OP THE BALTIC PROVINCES. 



21 



Philhedra rivulosa Kutorga, B3c. 

 Platystrophia biforata (Schlotheim), E. 

 PlatystropMa biforata lynx Eichwald, Fl, F2. 

 Platystrophia bifurcata (Eichwald), CI. 

 PlatystropMa chama (von Buch), C2. 

 Plecfambonites sericeus (Sowerby), E, F2. 

 Plectambonites transversa (Pander), CI. 

 Plectella eminens Lamansky, Bib. 

 Plectella extensa Lamansky, Bib. 

 Plectella gracilis, Lamansky, Bib. 

 Plectella media Lamansky, Bib. 

 Plectella ohtusa Lamansky, Bib. 

 Plectella semlovata Lamansky, Bib. 

 Plectella unciniata Lamansky, Bib. 

 Plectorthis plicatella (Hall), E. 

 Porambonites asquirostris Sehlotheim, CI. 

 Porambonites altus Pander, B2a, B2b, B2c. 

 Porambonites broggeri Lamansky, Bib. 

 Porambonites deformata Eichwald, Cl. 

 Porambonites gigas Eichwald, E, Fl. 

 Porambonites intercedens Pander, B3a, B3b, B3c. 

 Porambonites parvus Pander, B2a, B2b, B2c. 

 Porambonites planus Pander, B2a, B2b, B2c. 

 Porambonites reticulatus Pander, B2b, B2c. 

 Porambonites teretior (Eichwald), C2. 

 Porambonites triangularis Pander, B2a, B2b, B2c. 

 Pseudocrania antiquissima Eichwald, B3c. 

 Pseudocrania cranoides Huene, Fl, F2. 

 Pseudocrania depressa Eichwald, D. 

 Pseudocrania petropolitana Pander, B2b, B2c. 

 Pseudocrania planissima Eichwald, Cl, C2. 

 Pseudocrania scutella Huene, B3a, B3b, B3c. 

 Pseudometoptoma concentricum Huene, Fl, F2. 

 Pseudometoptoma curvatum Huene, Fl. 

 Pseudometoptoma monopleurum Huene, Fl, F2. 

 Pseudometoptoma siluricum Eichwald, B3c. 

 Rafinesquina imbrex (Pander), Cl. 

 Siphonotreta unguiculata Eichwald, B3a, B3b, Cl, 



C2. 

 Siphonotreta verrucosa Eichwald, B2b, B2c. 

 Streptis sp., F2. 

 StricMandinia sp., F2. 

 Strophomena assmussi Vemeuil, D, Fl. 

 Strophomena deltoidea Conrad, E, Fl. 

 Strophomena expansa Sowerby, F2. 

 Strophomena jentzschi Gagel, B3a, B3b, B3c. 

 Strophomena luna Tomquist, Fl, F2. 

 Strophomena rugosa Blainville, D, E. 

 Strophomena near scofieldi Winchell and Schuchert, 



e! 



Strophomena semipartita Roemer, Fl. 

 Strophomena tenuistriata Sowerby, Fl, F2. 



Triplecia dorsata (Hisinger), C2. 



Triplecia insularis Eichwald, Fl. 



CEPHALOPODA. 



Cyrtoceras angulosum Schmidt, Fl. 



Cyrtoceras archiaci Vemeuil, B3c. 



Cyrtoceras sphinx Schmidt, Fl. 



Discoceras antiquissimum (Eichwald) Fl, F2. 



Endoceras commune Wahlenberg, B3c. 



Endoeeras duplex Sehlotheim, B3b, B3c. 



Endoceras hasta Eichwald, Fl. 



Endoceras trochleare Hisinger, B3a, B3b, B3c. 



Endoceras vaginatum Sehlotheim, B3a, B3b, B3c. 



Estonioceras ariense Schmidt, B3c. 



Estonioceras imperfectum Sehlotheim, B3c. 



Estonioceras perforatum Schroeder, B3c. 

 Gomphoceras sp., E. 

 Qomphoceras lituus Hisinger, Cl. 

 Gomphoceras odini Verneuil, Cl. 

 Orthoceras arcuolyratum Hall, Fl. 

 Orthoceras atavus Brogger, Bib. 

 Orthoceras calamiteum Portlock, P2. 

 Orthoceras cuneolus Eichwald, Fl. 

 Orthoceras exaltatum Eichwald, Fl. 

 Orthoceras fenestratum Eichwald, Fl. 

 Orthoceras ibex Eichwald, Fl. 

 Orthoceras regulare Sehlotheim, Cl. 

 Planctoceras falcatum Sehlotheim, B3e. 



PTEEOPODA. 



Conularia sp., B3a. 



Conularia buchi Eichwald, B2c. 



Conularia quadrisulcata Leuchtenberg, B3b. 



Conularia ct. trentonensis Hall, Fl. 



Hyolithes acutus Eichwald, B3c. 



Hyolithes striatus Eichwald, C2. 



Tentaculites sp., E. 



Tentaculites anglicus Salter, Fl. 



Tentaculites annulatus Sehlotheim, F2. 



PELECYPODA. 



Ambonychia radiata Hall, Fl, F2. 



3Midiola devexa Eichwald, Fl. 



Modiola incrassata Eichwald, Fl. 



Twenty-eight species of Ordovician pelecypods 

 belonging to Avicula, Pterinea, Modiolopsis, 

 Cypricardia, Grammysia, and other genera, are 

 deseribedby Eichwald, but arenotmore definitely 

 located geologically. 



GASTROPODA. 



Bucania contorta Eichwald Cl, Dl, D2, Cl, Fl. 



Bucania cornu Koken, Fl. 



Bucania crassa Koken, Fl. 



Bucania crassiuscula Koken, Dl, D2. 



Bucania cycloides Koken, D2. 



Bucania cycloides Koken, mut., Fl. 



Bucania radiata (Eichwald), Cl, C2, C3, Dl, D2, 



E, Fl. 

 Bucaniaradiata (Eichwald), mut. macer Koken, B3. 

 Bucania salpinx Koken, Cl. 

 Bucaniella conspicua Koken. 

 Bucaniella decurrens (Eichwald), B3. 

 Bucaniella jugata Koken, Cl. 

 Bucaniella jugata Koken, mut., C2. 

 Bucaniella lateralis Koken, Dl, D2. 

 Bucaniella lineata Koken, Dl, D2. 

 Bucaniella obtusangula Koken, Cl, Dl, D2. 

 Bucaniella revaliensis Koken, B3. 

 Bucaniella rudicostata Koken, Cl. 

 Bucaniella silurica (Eichwald), B3. 

 Bucaniella undata Koken, Cl. 

 Clisiospira ingrica Koken, B3. 

 Cyclonema lineatum Koken, D2. 

 Cymbularia aequalis Koken, Fl. 

 Cymbularia angusta Koken, Cl. 

 Cymbularia cultrijugata Koken, Dl, D2. 

 Cymbularia galeata Koken, Cl, C2. 

 Cyrtolites grandis Koken, Cl. 

 Carinaropsis rostrata (Eichwald), Cl, Dl, D2, ?E. 

 Carinaropsis rostrata (Eichwald), mut., B3. 

 Eccyliopterus centrifugus Koken, Cl. 



