twenhofel: expedition to the Baltic provinces. 299 



111. Prionocheilus pedolobum (F. Roemer). 



112. Proetus kertelensis Schmidt. 



113. ramisulcatus Nieszkowski. 

 11-4. Remopleurides emarginatus Tornquist. 



115. Sphaerexochus angustifrons Angelin. 



116. Sphaerocoryphe cf. granulata Angelin. 



117. Trinucleus seticornis Hisinger. ^ 



From some portion of the Lyckhohn, and perhaps the lower part, 



were derived the species whose names follow : — 



1. Aulocoporella cepa (Roemer). 



2. Aulocopodium aurantium Oswald. 



3. Cyclocrinites spasski Eichwald (very doubtful). 



4. Solenopora spongioides Dybowski. 



5. Acantholithus astericus Roemer. 



6. Alveolites? hexagona Schmidt. 



7. Coccoseris micraster Lamansky. 



8. ungerni Eichwald. 



9. Halysites parallellus Schmidt. 



10. undulatus Kiaer. 



11. Heleolites hirsutus Lamansky, 



12. inordinatus Sowerby. 



13. interstinctus Linnaeus. 



14. parvistellus Roemer. 



15. Labechia confer ta Edwards and Haime. 



16. Lyellia bacillifera Lamansky. 



17. conferta Edwards and Haime. 



18. tubulata Edwards and Haime. 



19. Petraia darcoceras Dybowski. 



20. silurica Dybowski. 



21. Protaraea cf. vetusta Hall. 



22. Streptelasma europaeum Roemer. 



23. Tetradium wTangeli Schmidt. 



24. Glaphyrocystis compressa Jaekel. 



25. wohrmanni Jaekel. 



26. Hemicosmites grandis Jaekel. 



27. verrucosus Jaekel. 



28. Aulacomerella angusta Huene. 



29. macroderma (Eichwald). 



30. Craniella? papillif era Huene. 



