Myriapoda from Derbyshire. 321 



record, indicates tliafc the identification is that of our friend 

 Captain A. Randell Jackson, M.C., M.U., D.Sc, tt.A.M.C. 



In the section of the paper which deals with detailed 

 records we have introduced a few diagnostic points which 

 may be of value to other naturalists. 



Geological Considerations, etc. 



As far as our own 1918 collecting in the county is con- 

 cerned, we worked in two areas, both of them predominantly 

 limestone (Carboniferous Limestone) regions. The one was 

 the Buxton neighbourhood, where Burbage was our centre, 

 and where all our collecting was on the limestone, and the 

 other was mostly in the limestone triangle roughly formed by 

 Bakewell, Ashford, and Great Longstone; this area is indi- 

 cated in the present paper as ft Bakewell district," except 

 where more explicit details are given — as, for example, in 

 describing the occurrence of the new animals.. One of us 

 (S. G. B.-B.) accompanied the veteran local naturalist and 

 antiquarian, Mr. William Boulsover, of Bakewell, on one 

 excursion to Manners Wood, which stands out on a sandstone 

 (Yoredale Series) ridge close to the town of Bakewell ; the 

 collecting done there is clearly indicated in the body of the 

 records, but it may be noted that, in one short visit, Liihobius 

 variegatus was taken there, although the writers did not meefc 

 with it in either of the limestone areas, one near by, on the 

 occasion of their 1918 (May-June) collecting. The distri- 

 bution of this species, which is the only centipede on our 

 British list which is unknown outside the British Isles, is 

 extremely interesting, and worthy of careful study, in which 

 natural factors, including altitude, vegetation, and geological 

 features should certainly be taken into account. 



It may be added that the junction between the Carboniferous 

 Limestone and the Yoredale Kocks in the neighbourhood of 

 the Derbyshire-Staffordshire boundary, where we collected in 

 September 1916, is near the county boundary in that area, 

 the Derbyshire side being the border of an extensive 

 limestone region. • 



Cave Hunting. 



During our stay in the Bakewell district we made one 

 excursion through Monsal Dale to Cressbrook with Mr. J. K. 

 Widdowson to visit a cave in the limestone at Burymewick, 

 but, after all, we were not successful in finding any 

 jnyriapods there. Some good results are to be expected from 



Ann. & Mag. N. Hist. Ser. 9. Vol. ii. 24 



