Geological Society. 'liW 



localities) and some are very rare, though the small species of 

 E tblemma may be liable to be overlooked, from their inconspicuous 

 appearance ; they frequent waste ground. 



The Erasti'iuiKe, as recognized by Sir George Hampson, are 

 characterized as follows : — " Vein 5 of the hind wing is typically 

 nearly iully developed and usually arises from well above the 

 lower angle of the cell, although it is rarely obsolescent and then 

 springs from the middle of the discocellulars ; the eyes are not 

 hairy ; the tibise are not spined ; and the larvae have the first 

 pair or first two pairs of prologs aborted. 



" The subfamily is to a large extent confined to the tropical and 

 warmer temperate regions, especially the more arid districts, 

 and it has few species in the colder zones, and none in the Arctic 

 and Alpine zones." 



We may add that the species are usually of small or moderate 

 size and of varied patterns, and often attractively coloured, the so- 

 called " Noctaa-^a.\tern " being rarely distinctly indicated. 



PROCEEDINGS OF LEARNED SOCIETIES. 

 GEOLOGICAL SOCIETY. 



January 11th, 1911.— Prof. W. W. Watts, Sc.D., M.Sc, F.R.S., 



President, in the Chair. 



The foUowiug communication was read : — ■ 



'The Zonal Classification of the Salopian Rocks of Cautley 

 and Raveustonedale.' By Miss G. R. Watney and Miss E. G. 

 Welch. 



The district described lies north-east of Sedbergh and west of 

 the Dent Fault. An account of the literature treating of previous 

 work is given, and the succession of the zones is described. They 

 are as follows : — 



Lower 

 Ludlow. 



Wenlock. 



D 3. Zone of Monogrwpius leintwardinensis. 



D 2. „ Manograpius nilssoni. 



D 1. „ Phacops obtusicaudatus. 



C 4. „ Cyrtograptus lundgreni. 



C 3. „ Cyrtograptus rigidus. 



C 2. „ Munograptus riccartonensis. 



1. ,, Cyrtograptiis imtrchiscmi. 



Below are Valentian rocks (A & B divisions of the Stockdale 

 Shales). 



The Wenlock Beds are most fully developed in some streams 

 entering the River Rawthey from the south. The detailed succession 

 of these is given, and confirmatory sections are described in other 

 parts of the district. 



