Proceedings. 



time afterwards found small mussels attached to the legs of 

 f "gs, wh'rieft the water and jumped about, and got from one 

 Dond to another, and carried these bivalves with them 



Mr McKEANsaidMr. Darwin mentioned m his book tha 

 he put a duck's foot in a tank in which there were a great 

 number of young mussels, and some of them immediately 

 attached themselves to the foot. These mussels, "PO" the 

 foot bein- taken out of the water, were found to live a 

 sufficient time in the air for a duck to go many hundred miles 



Mr H T Mennell said the subject of Mr. McKean s paper 

 was one ;ery interesting to him.. He had given the subjec^ o 



f^SaninSS^^^^ 

 Sti^ursVe^ln^l^Sc^Mr^c^^^^^^ 



E- =!Jt^cSS'a^;^sr "^1^ 



nf mlSv vears- standing he (Mr. Mennell was perhaps qualified 

 lud/e S the amounrof labour and pains requisite to obtain 

 shins in the perfect condition Mr.McKean's werem. The study 

 of concholo-y was one he could strongly recommend the 

 members to'-Lrsue. One of its advantages was its com^ 

 "arTtivdy Hmited area, from the limited -mber o BnU.h 

 snecies of land and fresh water mollusca. One interesting 

 feature about the distribution of these shells was the extremely 

 S character of their distribution take for exampl^^^^^^^ 

 4,erversa by what perverse instinct it inhabited the trunks ot 

 fnl tvotrLs in the neighbourhood of Croydon it would be 

 dfficul to explain. These two trees were m the centre of a 

 ver> large fie'd. With regard to the erosion of water snails 

 tlS was a subject worth more attention particularly with the 

 r^^rcroscope. Nearly all his (the speaker's) specimens ot 

 Limneus slaber were affected in the same way. If they 

 fooked at\he shells of the pearl-bearing^mussel it would be 

 found they were also often eroded. He was inclined to 

 Stribute tL erosion of these fresh-water she Is to sorne sm^l 

 ve-etable growth eating into the surface of the shell, ne 

 Ihoud think that ought to be made out by "-^/o^^^P-^^ 

 examination. One very beautiful species of helix Mr. McKean 

 S not appear to hav^ observed, ikeli. -f "--)' P^^^fj^ 

 one of the most beautiful species we had. It had certain y 

 Seen found more than once on Banstead Downs, and it would 

 be worth while for anyone interested in the subject to look care- 

 fully for It in that locality. Mr. McKean had spoken of the 

 peculiaritv of the slug Testacella. This was a s ug that instead 

 of carrying its shell as a plate protecting ^ts vita o gans 

 ?nternafly. carried it externally. Although a beautiful and 



