from the Kuohers Stage in Estkonia. 335 



With tlie other species named by Bassler for this stage, this 

 makes a total of 56 species. 



]n the British Museum, Geological Dept., there are of. the 

 species of my collection which 1 found in the Klickers stage, 

 named on the table (pp. 332 & 333), the following : — Proto- 

 cn'sina exigua, Ulrich, Regd. D. 29830 ; Pachydictya b'fur- 

 cata, Hall, Regd. D. 29838 ; Chasmatopora teuella, Eichw aid, 

 Regd. D.29831; Batoston.a wincheUi, Ulrich, Regd. D. 29834; 

 Pat. stoma fertile circulare, Ulrich, Regd. D. 29835. The 

 other species that I found in the Kuckers shale and marl, 

 named on the table, are in my collection in the Geological 

 Museum of the University of Tartu. 



The mode of occurrence of the various species is remark- 

 able. In some places the tine delicate white skeletons of 

 diverse bryozoa are in great abundance ; locally they aie 

 absent from the shale. In the bituminous or oil shale the 

 following abound : — Chasmatopora furcata, Pseudohorvea 

 bifida, Protocrisina exigua, Pachydictya elegans, P. (yclosto- 

 ?noides } P. huckersensis, Graptodictya bourn mai. There is 

 an abundance of Tiepostomata in the shale and still more in 

 the marl or limestone, e.g.: Diplotrypa petro/ioldana, 

 Dianulites petropolitana, Hallopora dybovskyi, and various 

 species of Batostoma and Hemiphragma. 



EXPLANATION OF PLATE VII. 

 Pachydictya kuckersensis, sp. n. 



Figs. 1-3. Outlines of zoarial fragments, nat. size. 

 Fig. 4. Portion of zoarial surface, X 12 diani. 

 Fig. 5. Tangential section of zoarium, x 1 2 diam. 

 Fig. 6. Transverse section of zoarium, X 12 diam. 



Pachydictya crassa, Hall. 



Fig. 7. Outline of zoarial fragment, Brit. Mus., Geol. Dept, D. 29832 ; 



nat. size. 

 Fig. 8. Portion of zoarial surface of the same specimen, x 7 diam. 



Nematopora bogo/jubovi, sp. n. 



Fig. 9. Zoarial fragment ; holotype ; Brit. Mus., Geol. Dept., D. 29833 ; 



nat. size. 

 Fig. 10. Portion of zoarial surface of the holotype, X 13 diam. 



