JOURNAL OF CONCHOLOGY. 247 



DERBYSHIRE 

 FROM A CONCHOI.OGIST'S POINT OF VIEW. 



By LIONEL E. ADAMS, B.A., Treas. C. S. 



(Read before the Conchological Society, March 5th, 1890). 



Thinking that it may interest some collectors, especially tyros, 

 I send a few notes on a partial and very inadequate study of 

 Derbyshire as a 'happy hunting ground.' 



I do not intend to waste valuable space with descriptions 

 of scenery, nor to detail my captures, but to show how such a 

 district may be advantageously dealt with. When working a 

 district I have found it convenient to choose a suitable head- 

 quarters, and each day, armed with an Ordnance map, to ex- 

 plore a sector of a circle, with the headquarters as centre, and 

 with a radius of five or six miles. When the circle is completed 

 another headquarters should be found, so that a similar circle 

 surrounding it is contiguous to the one completed. When such 

 a circle has been explored the explorer should by no means 

 flatter himself that its resources are exhausted. In many a 

 limited area that I have worked almost daily for three or four 

 years fresh species and varieties have contuiually appeared. 



Having made myself acquainted with the leading geologi- 

 cal features of the county I divided it into four districts as 

 follows : — 



(i) The Peak or Grit and Heather District^ consisting of 

 the N.W. corner cut off by a line from Hathersage, through 

 Castleton, Chapel-en-le-Frith to Whaley Bridge. This district 

 promised almost «//, and the promise has been realised, for with 

 the exception of a very few of the commonest slugs I found 

 nothing, though I should mention that my work was done here 

 during intermittent frosts. There is one little spot, however, 

 which may yield something, between Hayfield and New Mills, 

 where there are two small woods and a few hedges. 



