BRITISH ISLES. 7 



decomposition of the spathose ore which is met with, before the sea-level 

 is reached. The great bunches of ore in the Perran lode appear to 

 occur where it is crossed by the north and south lead-lodes of the dis- 

 trict. No less than eighteen different minerals occur in connexion 

 with the lode. Analyses of the ore are given, and also an analysis of 

 the garnets that are sometimes found near it. C. L. N. F. 



Ckosskey, Rev. H. ^Y. Report of the Committee appointed for the 



purpose of ascertaining the existence in different parts of the 



United Kingdom of any Erratic Blocks or Boulders. Eep. Brit. 



Assoc, for 1873, pp. 188-194. 



The report notes the occurrence of striated Charnwood-Forest 



boulders at Hugglescote railway-cutting, near Bardon Hill. Similar 



boulders are described from Ketley gravel-pit, 50 miles distant from 



Charrjwood Forest, where they are associated with travelled boulders 



of granite, probably from Cumberland or Scotland, and with blocks of 



local origin. The boulders occur in sand, with molluscous shells, 



chiefly in fragments ; thirteen species have been identified, of which 



only one (Astarte borealis) is extinct in British waters. The report 



gives details of the method employed in mapping the boulders of the 



Midland districts ; some information regarding the boulders of this area 



is given ; and the report concludes with a description, by Mr. PengeUy, 



of a granite boulder on the shore of Barnstaple Bay. AV. T. 



Dakyns, J. R. On the Geology of part of Craven. Rep. Brit. Assoc, 

 for 1873, Sections, pp. 78, 79. 



This paper gives a great amount of detail ; it describes the divisions 

 of the Millstone Grit, comparing them with those in other districts. 

 The whole series is divided into two by a conspicuous grit, continuous 

 with the third grit of Lancashire, and here named the middle grit. 

 The general run of the rocks in the basin of the Aire is described : the 

 general strike is N.E. and S.W. ; but about the latitude of Skipton it 

 changes to E. and W. The Yoredale rocks are described. W. T. 



Darbishire, R. D. Note on a Deposit of Middle Pleistocene Gravel 

 in the Worden-Hall Pits, near Leyland, Lancashire ; and on a 

 Collection of Shells and Fragments of Shells found there by Miss 

 M. H. Ffaiington. Quart. Journ. Geol. Soc. vol. xxx. pp. 38-40 

 (see also Proc. Lit. and Phil. Soc. Manchester, vol. xiii. p. 72). 

 The pit is from 40 to 50 feet deep ; the top part is in a yellow brick- 

 clay, the bottom part in a fine sea-sand (of unknown depth) ; between 

 these lies the gravel, 30 to 40 feet thick. The pebbles are of many 

 kinds ; there are often fragments of Mountain Limestone, flints rarely 

 occur; some of the larger stones are striated. Fragments of marine 

 shells occur throughout the gravel, but the larger number at its base, 

 just above the sand ; here the shells are often unbroken. The shell- 

 bearing band is 240-250 feet above the sea. 



The shells resemble those found in the Wexford gravels ; they also 

 represent the present fauna of the western shore of Britain, except that 

 an arctic shell {Fusus craticulatus, Fabr.) also occurs. W. T. 



