296 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
twenty-five feet in thickness and all apparently belong to the Lower 
Lyckholm. The lowest beds seen appear to be those-of Hohenholm 
and Taps. 
The best present collecting localities for the lower divisions of this 
formation are Paope and Pallokiill, both on the island of Dago. At 
these two places the quarries are in operation and new exposures are 
constantly being made. Other localities in addition to those men- 
tioned where the lower beds appear to outcrop are Neuenhof, Od- 
dalem, Saximois, Sutlep, Forel, and Kirna. 
Characteristic fossils of the Lower Lyckholm are Pseudolingula 
quadrata, Porambonites gigas, Triplecia insularis, Subulites gigas, and 
Salpingostoma dilatatum. The species which are known to occur in 
the lower portion of the Lyckholm are :— 
Calapoecia canadensis Billings. 
Clathrodictyon cf. vesiculosum Nicholson and Murie. 
Columnaria fascicula Kutorga. 
Halysites catenularia (Linné). 
escharoides (Lamarck). 
Paleofavosites asper (d’Orbigny). 
Proheliolites dubius Schmidt. 
Streptelasma cf. corniculum Hall. 
Syringophyllum organum Linné. 
10. Anaphragma mirabile Ulrich and Bassler. 
11. Ceramopora intercellata Bassler. 
12. Chilotrypa immatura Bassler. 
13. Corynotrypa abrupta Bassler. 
eg et te oo be 
14, barberi Bassler. 
15: ~ dissimilis (Vine). 
16. Dianulites colliferus Bassler. 
Li. grandis Bassler. 
18. suleatus Dybowski. 
19. Dittopora colliculata (Eichwald). 
20. Diplotrypa petropolitana Nicholson. 
21. Glauconema plumula Wiman. 
22. Hallopora elegantula (Hall). 
- 23. Monticulipora dagoensis Bassler. 
24. Nematopora fragilis Ulrich. 
25. Orbignyella expansa baltica Bassler. 
26. Orbipora fungiformis Eichwald. 
27. Pachydictya bifureata (Hall). 
_ ln te 
