847 



Pychn, 



Logan's section of the S. Joggins), a bed of fine mud rock (2 

 inches thick) ; the shells abundant and perfect, except being 

 flattened by the subsequent pressure of Coal measure sedi- 

 ments, and in all stages of growth, the young having a very dif- 

 ferent shape from the old. There is every reason to expect to 

 find such land shells in the Pennsylvania coal measure mud 

 layers. XIII. 



Pycnostylus elegans, Whiteaves. G. S. Can. Pal. Foss 



TIJ, fi<f.2 



Y^S^' - ^ ^ Wkileaoes, ^^ ' Pal. Can . ///, 4. 

 Ill, part 1, 1884, page 4, plate 1, fig. 2, showing the mode of 

 budding''(one bud^being \\ in. long) from others broken off at 

 the base ; entire circle probably seven or eight buds ; possi- 

 bly P. guelphensis denuded of epitheca ; 2a, natural section 

 of a part of the corallite, exhibiting its complete tabulae, and 

 marginaFsepta. Found at Hespeler, and at Durham, Canada 

 West. Ouelph formation. VV. 



Pycnostylus guelphensis, Whiteaves ( ? Amplexiis hull- 



\j^l 



/.A 



mi<.:-^ 











CCC72,^ 



-,'" '^-Z U^. . ^^ 



a^i^5 Bill. 1863. Amplexus (?) sp. Nicholson, 1875.) Geo. Sur. 

 Canada, Palaeozoic Fossils, Vol. Ill, part 1, 1884, page 3, plate 

 1, fig. 1, natural size^ natural section of some of the corallites ; 

 1 J, natural cross section showing their partitions after budding ; 

 found at various places ; a characteristic and common fossil of 

 the Ouelph (uppermost Niagara) in W. Canada. F, 5'. 



