26 A. R. Horivood — Upper Triaa of Leicester shire. 



was criticized and amplified recently by Mr. L. Richardson, who asked 

 the writer to check his new measurements, -which was done with 

 approval at the time. Since then I have had reason to examine it 

 in greater detail with, somewhat different results. Messrs. A. J. S. 

 Cannon and Siddons have i-ecently been examininp: this section 

 systematically for fossils, and have obtained some very fine and 

 interesting material. Some of this has been described recently, 

 but other material will be alluded to later. The fossil annelid 

 Archirenicola is of especial interest, constituting a new type. 



Of works dealing generally with the geology of Leicestershire, the 

 earliest is that of J. B. Jukes, who contributed an original and 

 valuable memoir to Potter's Cliarnivood Forest. The Rev. W. H. 

 Coleman, of Ash by, a friend of Professor A. H. Green, who was liis 

 pupil, wrote another good general article for White's Directory, 

 Ansted dealt with the physical geography and geology in 1866, but 

 very little of this woi'k was original. The Geologi/ of England and 

 Wales in 1876 (and later editions) gives a general description. 

 Harrison in his Sketch, 1877, gives a very good and largely original 

 account, with photographic plates, and in 1882 he published his 

 Geolof/// of the Cotmties. An important memoir by Horace Brown on 

 the Permian rocks of the district deals incidentally with tlie Trias, 

 and is of first importance. 



The meeting of the British Association here in 1907 necessitated 

 a locnl handbook, and the geology was treated by my friend the late 

 Mr. Fox-Strangways and Professor W. Watts. The articles on the 

 palaeontology and a bibliography were written bv myself. In the 

 same year an account was contributed by Mr. Fox-Strangways for 

 the Victoria County History on the Geology. 



The publications of the Geological Survey from time to time on 

 this district deal more or less in detail with each formation. Those 

 that refer to the Trias are Hull's memoirs (1860, 1869), A. J. Jukes- 

 Browne (1885). Mr. Fox-Strangwavs gave an account of the 

 district in 1900 (Sheet 155), 1903 (Sheet 156), 1905 (Sheet 141). 

 and in 1907 in the descriptive memoir on the Coal-field. En 1909 

 Mr. Lamplugh described the district north of Melton (Sheet 142), 

 including some parts of Leicestershire. l^lxcept in the last case 

 these official survey accounts are lacking in those necessary field 

 details which are so important for purposes of exact correlation. 



The following account, therefore, whilst ignoring no previous 

 observations, is more than half based upon original field work and 

 laboratory study during a period dating from 1908, when my 

 investigations in this direction received the aid of a grant from the 

 Government Grant Committee. Until now I have only been able to 

 publish interim reports, or records of isolated pieces of work connected 

 with the investigation. This account, moreover, is a topographical 

 report upon part of the area (Midlands) to be studied. Similar 

 reports upon the adjoining counties are to be ]uiblished from time 

 to time, and a final report will give an account of the whole distinct 

 and summarize the chief results of the research. Since the detailed 

 petrographical work will take some time to complete, only a summary 

 is given here. 



