COLLINUE : iNOTES ON SLUGS AND SLUG-LIKE MOLLUSCS. 19 



4.— Variations in the Foot-fringe of Arion empirieorum. 



For some years I have made careful notes upon the variations in the 

 colour of the foot-fringe of our common Arion. The observations have 

 extended over nearly five years, during which time many hundreds of 

 specimens have been examined, with the result that 228 specimens out of 

 just over 1,000 have been noted to possess variously coloured foot-fringes. 

 The percentages of these is rather interesting. 



Of the white there were 12, grey 14, fawn 10, light brown 13, 

 chocolate-brown l(i, steel-blue 10. greyish-violet 5, pale yellow 2'J, deep 

 yellow 5G, brick-red 7, salmon-pink G, orange-red 42, sepia 8. In fourteen 

 of these specimens, there were no lineoles. 



Excepting fourteen, all the 228 specimens differed from the type, 

 i.e., were colour variations, and ten were albinos. 



A few attempts were made to keep some of the most brilliantly 

 coloured varieties under observation, and it was noticed that those 

 specimens with yellow, light broAvn, or fawn-coloured foot-fringes, soon 

 underwent a change, whilst all the red coloured ones seemed much more 

 permanent. 



NOTES. 



The Molluscan Fauna of Warwiel^shire.— Tlic council of the 

 Midland Malacological Society have in preparation a I'auna of the MoUusca 

 of AVarwickshirc in which it is proposed to give all possible information on 

 the species occurring in the County, viz. : — Localities, Food Habits, General 

 Distribution, Oeological Formation of District, and other interesting details. 

 They will Ix' pleased to receive the co-operation of all interested, so that the 

 work may not only be a list, but complete, and a valuable one of reference. 



In submitting Molluscs, Shells, etc., or information respecting them, 

 workers are requested to give as full details as possible as to : — ■ 



1. Locality. 2. Date when collected or observed. 3. Name of the 

 plant on which feeding or where resting. 4. Whether the animal gives of!" 

 any particular odour. 5. Position, aspect, and general features of locality, 

 viz. -.—marsh, wood, ditch, etc., etc. 6. Geological formation of ground. 

 7. General distribution. 8. Whether plentiful. 9. Other particulars, 

 such as size, colour, texture, preponderance of any special form, or other 

 points of interest. Due recognition will be accorded to all sucli observation. 



It is proposed to issue from time to time a summary as to how the work 

 is progressing, which will be duly forwarded to all who have contributed.— 

 H. OvERTOx, Clifton Road, Sutton Coldfield. 



