80 SCIENTIFIC SURVEY OF NOTTINGHAM AND DISTRICT 



England, and in the years 1910-1913 he contributed to the NaturaUsts' 

 Society Transactions three important papers on the species occurring in 

 Nottinghamshire, amounting to 87 in number — the largest number re- 

 corded for any British county. 



The Mollusca enumerated in the Invertebrate Fauna comprise 116 

 out of the 145 indigenous non-marine species recorded for the British 

 Isles, besides three others which have been found in a semi-fossil state in 

 recent deposits, but have not been seen alive in the county. These figures 

 are satisfactory v^'hen account is taken of the fact that the soils of 

 Nottinghamshire are not very suitable for the terrestrial species owing to 

 the predominance of sand and clay and the comparative absence of 

 calcareous formations. Molluscs have always been favourite objects 

 with Nottingham naturalists, and were indeed the only invertebrates 

 dealt with in the Handbook to Nottingham issued in 1866 in connection 

 with the first visit of the British Association to Nottingham. This article 

 was by E. J. Lowe, F.R.S., who had previously (in 1853) published an 

 illustrated work on the Conchology of Nottingham. Other papers on the 

 Nottinghamshire mollusca were pubhshed from time to time by C. T. 

 Musson, W. A. Gain and B. S. Dodd, and an article by the last-named 

 was included in The British Association Handbook for 1893. Finally, in 

 1906, B. S. Dodd and B. B. Woodward summarised all our existing 

 knowledge of the Nottinghamshire mollusca in the Victoria History of 

 Nottinghamshire. 



Other invertebrates found in the county and recorded in the Inverte- 

 brate Fauna of Nottinghamshire are a sponge, four species of Hydrozoa, 

 many Rotifera, five Polyzoa, eleven Crustacea belonging to the sub-class 

 Malacostraca, and many Entomostraca, twenty-four species of Myria- 

 poda, etc. 



Since the publication of the above work a large amount of new material 

 has been accumulated, and the results of this intensive collecting were 

 presented in a bulky Supplement issued in January 1935. No fewer than 

 1,255 species were added to our invertebrate fauna in this Supplement, 

 bringing the total for the county up to 6,585. Of the 1,255 additional 

 species, 1,228 are insects, the rest comprising Nematodes, Hirudinea, 

 Crustacea and Acarina. The Diptera and Hymenoptera account for the 

 majority of the insects, the additional species of the former numbering 

 691 and of the latter 399; among these are several species new to 

 Britain and many others that are little known or of extremely rare occur- 

 ence. The other species new to Nottinghamshire include : Hemiptera 

 58, Coleoptera 40, Trichoptera 14, Lepidoptera 12, and a few representa: 

 tives of the smaller orders. 



Between January 1935 and August 1936, 64 additional species of insects 

 have been identified, and these are included in the totals given below. 

 A very large amount of unidentified material still awaits working out, 

 and when this is done many more species will be added to most of the 

 insect groups. 



