310 The Correlation of the Yoredale and Pendleside Series. 



was universally held till I was able to show that the Black Shales 

 Series which succeeded the Limestone massive of the Midlands, 

 contained a totally different fauna from that which characterised 

 the Yoredale Series. He has simply returned to the view then 

 held by the Geological Survey (1881), as shown by his table. 

 With the object of testing the grounds for my conception that 

 the Yoredales of Wensleydale and the north were the equiva- 

 lents of the upper part of the ' massif ' Carboniferous Limestone 

 of Cracoe, Clitheroe, Derbyshire and Staffordshire, several 

 sections were examined by expert collectors. The result of 

 Mr. Rhodes' work was published in the ' Report of the British 

 Association for 1901. and the faunas which were shown 

 to occur in the Upper Yoredale beds seemed to me identical 

 with that which was well known in the upper beds of the 

 massif in the Midlands. There was no question of a single 

 species occurring in association with different fauna at widely 

 separated localities ; but the palseontological conceptions are 

 formed from the examination of the whole fauna. A similar 

 examination was made by myself of the limestones of Weardale, 

 and published in ' Proc. Yorks. Geol. Soc.*, in which publica- 

 tion are tables showing the species common to both the Yore- 

 dale and Pendleside faunas, and emphasising the important 

 and radical difference between them. 



Stratigraphical difficulties are not going to be solved by 

 haphazard palaeontological methods, and as the old proverb 

 says, ' one swallow does not make a summer,' the occurrence 

 of a single species of any fauna does not warrant correlation of 

 beds in distant areas which contain dissimilar faunas, especially 

 when that species is a lamellibranch, a family many of whose 

 members are known to have a large vertical range. 



The ArchcBological Journal for March contains an elaborately illustrated 

 paper, by Count Paul Biver, on ' Some Examples of English Alabaster 

 Tables in France.' The material from which these were made in the middle 

 ages was apparently obtained from either Nottinghamshire or Yorkshire. 



The July British Birds contains a confirmation of the record of the 

 Peregrines at Bempton, which was made in ' The Naturalist ' by Mr. E. W. 

 Wade a month previously. In the same journal is a note recording the 

 nesting of the Little Tern at Teesmouth. This species has ' not previously 

 nested at the Tees Mouth within the memory of living man.' There is 

 also a record of the fact that ' since the publication of "The Birds of York- 

 shire," three of the climbers therein referred to have been placed Jiors de 

 combat.' We hope it is only a coincidence. 



* Vol, XIV., p. 446, et seq. 



Naturalist, 



