On new Bryozoa from Esthonia. '627 



XXXII. — New Bryozoa from the Kuckers Stage in Esthonia. 

 By Hendrik Bekker, Caiid. Geol,, University of Tartu 

 (Dorpat). 



[Plate VII.] 



Introduction. 



Id the summer of: 1917, I made a collection of bryozoa in 

 the quarries of the villages Tiirpsalu and Kukruse or 

 Kuckers, 10 km. N.W. of Jewe Station. These quarries had 

 been taken in hand by the Kussian Committee of Fuel 

 in Petrograd, for the purpose of determining the existence 

 and thickness of shale in the Kuckers stage of the Middle 

 Ordovician in Esthonia. 1 was unable to obtain the results 

 of their research, and because of war conditions could move 

 without restriction only in a very limited area. 



During the winter of 1917, and in the first quarter of 1918, 

 I determined a part of the collection in the Geological 

 Institute of (he University of Taitu (Dorpat or Jurjev). 

 For the more complete examination and study of my 

 collection, 1 had the opportunity of visiting London. 



I am indebted to the officers of the Geological Department 

 of the British Museum for facilities in the library, for the 

 use of Dr. R. S. Bassler's bryozoa collection from Esthonia, 

 and the bryozoa material collected by Dr. F. A. Bather from 

 Esthonia and the Swedish formations, especially those 

 of Oc land. 



1 have also been permitted to work in the Library and 

 Museum of Practical Geology. 



Finally, I must express my warmest thanks to Dr. F. A. 

 Bather, F.R.S., for his indispensable help in revising the 

 manuscript. 



Kuckers Stage in Kukruse and Ttjrpsalu. 



In the vicinity of the villages Kukruse and Tiirpsalu, 

 3-6 km. from the shores of the Gulf of Finland, the Middle 

 Ordovician strata rise in a sloping terrace, varying in height 

 from 3 to 5 or 6 metres. On the slope of this ascent the 

 Kuckers stage (C 2 of F. Schmidt*) crops out. This stage is 

 a white or greyish-yellow limestone or marl, with intercalated 

 layers of biiutninous shale. 



* F. Schmidt, "On the Silurian and Camhrian Strata of the Baltic 

 Provinces etc.," Quart, Journ. Geol. Soc. xxxviii. p. 514 (1882). 



