308 bulletin: museum of comparative zoology. 



belonging to the Heleolitidae, Calapoecia, Favosites, and Halysites. 

 Bryozoa are very abundant and there are also many brachiopods. 

 The fauna of the formation is as follows : — 



1. (?) Aulocopodium aurantium.^ 



2. Acanthodus tubulus Dybowski. 



3. Acantholithus astericus. 



4. Calapoecia canadensis. 



5. Clathrodictyon cf. vesiculosum. 



6. Coccoseris microporus Eichwald. 



7. Coelophyllum amalloides Dybowski. 



8. Columnaria fascicula. 



9. Cyathophyllum middendorfi Dybowski. 



10. Endophyllum contortiseptum praecurser Weissermiill. 



11. Favosites forbesi Milne Edwards. 



12. Halysites catenularia. 



13. escharoides. 



14. parallelus. 



15. undulatus. 



16. Heleolites inordinatus. 



17. Lyellia bacillifera. 



18. cancellata Lamansky. 



19. conferta. 



20. Paleofavosites asper. 



21. Pholidophyllum tubulatum Schlotheim. 



22. Streptelasma elongatum Phillips. 



23. europaeum. 



24. Syringophyllum organum. 



25. Hemicosmites tricornis Jaekel. 



26. Chasmopora tenella (Eichwald). 



27. Corynotrypa dissimilis. 



■ 28. Fenestella striolata Eichwald. 



29. Glauconema plumula. 



30. strigosa (Billings). 



31. Hallopora elegantula. 



32. Lichenalia concentrica Hall. 



33. Nematopora lineata (Billings). 



34. Pachydictya bifurcata. 



35. Phaenopora ensiformis (Hall). 



I Species without authority also occur in the" Lyckholm. 



