314 VINE: MICRO-PALEONTOLOGY. 



The stages are as follows : — 



Stages. North of England. Stages. Central Scotland. 



E. Gannister Beds 

 D. Millstone Grit. 



E. Slaty-black-band series. 

 D. Moorstone Rock series. 

 / / Upper Limestone series 



< Flagstones and Shales. C. < t C^^^^^^^^ Beds), 



j ° j Lower Coal and Ironstone 



V i I series. 



B. Scaur-Limestone Series. ; B. Lower Limestone series. 

 A. 'Tuedian' sometimes absent. A. Calciferoiis Sandstone series,' 

 At the time Mr. Etheridge wrote his address and gave the census 

 of species, the Polyzoa of the Northern Shales had not been well 

 worked, but a goodly list of species found in the Scotch Shales 

 had been presented to the notice of palaeontologists by Mr. Young 

 and others. Mr. Etheridge (op. cit. p. 185) says that ' 77 species of 

 Bryozoa range through the three lower horizons of the Carboniferous 

 series (A, B, C), 74 belong to the true Carboniferous Limestone, 

 28 to the Lower Limestone Shales and Lower Limestones, and 4 to 

 the Calciferous series, 7wf a single species passes to o?' occurs in the 

 Yoredale (the italics are mine. — G. R. V.) Millstone Grit or either 

 one of the three divisions of the coal measures.' I have not the least 

 doubt but that Mr. Etheridge is quite prepared to qualify these remarks, 

 especially so as he said that the above census was given as stated 

 by authors, but waiting special revision by myself and Mr. G. W. 

 Shrubsole. 



The Polyzoa of these Yoredale rocks are not abundant on the 

 Northumbrian or Eastern side of England, but on the Western or 

 Lancashire side the species rival in abundance — though not abundance 

 of individuals — the Lower Limestone series of Scotland, and in giving 

 the localities of the species now described, I only refer to published 

 lists. The Yoredale species from the Western side of England 

 I possess through the kindness of Mr. J. W. Kirkby, and these will 

 be studied for a special memoir on Yoredale Polyzoa. 



Sub-order CYCLOSTOMATA Busk. 



See p. 62 (Naturalist). 

 Fam. FENESTELLID^. 

 Genus FENESTELLA Miller and Lonsdale. 

 See ante. Naturalist, p. 62. 



I Fenestella nodulosa Phill. 



Geol. Yorks., pi. i., figs. 31-33, G. W. Shrubsole, Quart. Journ. Geol. Soc, 

 May 1879, May 1880. 



There are only two or three very poor fragments of Fenestella — 

 F. 7iodulosa (?) Phillips — and with these are associated a few examples 



Naturalist, 



