EAELY PALEOZOIC BRYOZOA OF THE BALTIC PROVINCES. 



19 



the Lyckholm and all of the Borkholm are, in -Ajuerican terms, of 

 Richmond ( earhest Silurian) age. 



PALEONTOLOGY OF THE BALTIC AREA. 



Although it was my intention to treat only of the Russian Ordo- 

 vician bryozoan faunas, it became necessary, in order to get an 

 idea of the associated forms, to compile hsts showing the distribu- 

 tion of the other groups of organisms. As such lists of these Russian 

 species have never been assembled in one publication, they are 

 reproduced herewith for the benefit of future workers on these faunas. 

 These lists, however, do not contain all the species that have been 

 named, for Eichwald especially has described a large number which 

 are not included because they have never been assigned to any 

 horizon other than the "calcaire a Orthoceratites," which includes 

 all of the formations from B to F, inclusive. Similar Hsts of the 

 Ordovician fossils of the upper Mssissippi Valley are given in part 2, 

 volume 3, of the Minnesota Geological Survey, to which the student 

 is referred when making comparisons between the two areas. The 

 following hsts, however, do not include the Bryozoa, which are 

 tabulated on a later page. 



MISCELLANEOUS. 



Astylospongia globosa Eichwald, B3. 



Aulocopella cepa (Roemer) Fl. 



Aulocopium aurantium Oswald, Fl, ?F2. 



Cycloerinus spasski Eichwald, D3, Fl. 



Mastopora concava Eichwald, Dl, E. 



Phyllograptus sp., B3. 



Eeceptaculites eichwaldi Schmidt, Dl. 



BeceptaculUes orbis Eichwald, Cl. 



Siphonia cylindrica Eichwald, Bl. 



Solenopora spongioides Dybowski, D3, Dl, 01, Fl. 



(=S. compacta Billings). 

 StTomatopora mammillata Schmidt, F2. 



ANTHOZOA. 



AcanthoUthus asteriscus Roemer, Fl, F2. 



Alveolites? hexagona Schmidt, Fl. 



Coccoseris megastoma var. minor Lamansky, Fl. 



Coccoseris micrastar Lamansky, Fl. 



Coccoseris microporus Eichwald, F2. 



Coccoseris ungerni Eichwald, Fl. 



Coelophyllum amalloides Dybowski, F2. 



Columnaria fascicula Kutorga, Fl, F2. 



Cyathophyllum middendorfli Dybowski, F2. 



Endophyllum contortiseptatum var. prxcursor Weis- 



serm, F2. 

 Favosites asper d'Orbigny, F2. 

 Holy sites catenularius Linnaeus, Fl, F2. 

 Halysites escharoides Lamarck, Fl, F2. 

 Holy sites parallela Schmidt, Fl, F2. 

 Halysites undulata Kiaer, Fl, F2. 

 Heliolites hirsutus Lamansky, Fl. 

 Heliolites inter stinctus, Linnaeus, Fl. 

 Heliolites parvistella Roemer, Fl. 

 Labechia conferta Edwards and Haime, Fl. 



Petraia darcoceras Dybowski, Fl. 

 Petraia silurica Dybowski, Fl. 

 Pholidophyllum tubulatum Schlotheim, r2. 

 Proheliolites duhius Schmidt, Fl. 

 Propora bacilUfera Lamansky, Fl, F2. 

 Propora cancellata Lamansky, F2. 

 Propora conferta Edwards and Haime, ?F1, F2. 

 Propora tubulata Edwards and Haime, Fl. 

 Protarea vetusta Hall, Fl. 

 Protarea sp., E. 



Streptelasma cfr. profundum Hall, E. 

 Streptelasma corniculum HaU, Fl. 

 Streptelasma elongatum PhilUps, F2. 

 Streptelasma europxum Roemer, Fl, F2. 

 Calapmcia cribriformis Nicholson, F2. 

 Syringophyllum organon Linnaeus, F2. 

 Tetradiuvi sp., r2. 



ECHINODEEMATA. 



Asteroblastus foveolatus (Eichwald), B3. 

 Asteroblastus sublxvis Jaekel, B2a. 

 Asteroblastus tuberculatus Schmidt, B3. 

 Asteroblastus volbortM Schmidt, B3. 

 Asterocrinus munsteri Eichwald, B2a. 

 Blastoidocrinus sp., B3. 

 Bolboporites sp., B3a, B3b. 

 Bolboporites semiglobosa Pander, B2a, B2b, B2c. 

 Bolboporites triangularis Pander, B2a, B2b, B2c. 

 Bolboporites triangularis var. uncinata Pander, B2a, 



B2b, B2c. 

 Caryocystites aranea Schlotheim, Cl. 

 Caryoeystites baltieus (Eichwald), Cl. 

 Chirocrinus atavus Jaekel, B3. 

 Chirocrinus degener Jaekel, B3, CL 

 Chirocrinus giganteus Leuchtenberg, B2a, B2b. 

 Chirocrinus granulatus laekel, C2. 



