TWENHOFEL: EXPEDITION TO THE BALTIC PROVINCES. 335 
13. Ptilodictya lanceolata. 
14. Camarotoechia nucula (Sowerby). 
15. Chonetes striatellus. 
16. Leptaena rhomboidalis. 
17. Retzia salteri. 
18. Rhynchonella diodonta Dalman. 
19. Spirifer elevatus. 
20. schmidti Lindstrom, 
21. Strophomena filosa Sowerby. 
22. Spirorbis imbricatus. 
23. Autodetes calyptratus (Schrenck). 
24. Euomphalus? catenulatus Wahlenberg. 
25. cornuarietis Wahlenberg. 
26. Holopella obsoleta Sowerby. 
27. Pterinea reticulata Hisinger. 
28. retroflexa Wahlenberg. 
29. Orthoceras bullatum Sowerby. 
30. Calymene intermedia Lindstrém. 
- 3i. spectabilis. 
32. Proetus conspersus. 
Farther southwest on the same coast is the Ohhesaare Pank in 
which strata of about ten feet in thickness are exposed, consisting of 
interstratifications of gray and red sandy limestones and calcareous 
shales of various shades of brown, the latter dominating in the middle 
of the section. The sandy limestones contain many small remains of 
fishes, while the shales carry numerous pelecypods of which Grammysia 
cingulata Hisinger is probably the most abundant. The invertebrate 
fauna is quite similar to that of Kaugatoma Pank, but the presence 
of fish remains and the absence of crinoids are marked features of 
difference. These differences are probably to be referred to differ- 
ences in the ecologic facies during the times of sedimentation. The 
complete fauna from Ohhesaare Pank is as follows: — 
1. Favosites cristatus. 
forbesi. 
Trachypora porosa Dybowski. 
Dianulites elegantulus Dybowski. : 
Hallopora elegantula. 
maculata (Dybowski). 
-Ptilodictya lanceolata. 
Chonetes striatellus. 
eee ee et 
