440 THE ZOOLOGIST. 
does not seem to occur in Sussex, but is common in Devonshire; and 
Solen pellucidus is found in the Scilly Islands, but is either absent or 
very rare further east. The fresh-water species are Bythinia tentaculata, 
B. Leachii, Planorbis complanatus, P.vortex, Limnea auricularia, L. peregra 
var. ovata, and L. stagnalis. All these species are more or less common in 
the South of England. The Terrestrial species are more interesting :— 
Hyalina Draparnaldi, Arion ater var. rufa (dark olive-brown), Helix aspersa, 
H. nemoralis, H. virgata (and bandless variety), H. pulchella (type form), 
Cochlicopa lubrica var. minor, Cochlicella acuta vars. strigata and alba, and 
Pupa marginata. All these species are found on the south coast of 
- England; but C. acuta probably does not occur east of the Isle of Wight 
(‘ Naturalist,’ 1885, p. 181), and Hyalina Draparnaldi has not been found 
nearer than South Devon. The varieties of H. nemoralis and C. acuta 
were very interesting. Mr. Payn sent sixty-one examples of the former, of 
which twenty-one were rubella 12345, ten castanea 00000—some with linear 
abrasion very well marked (antea, p. 115), nine libellula 12845, six rubella 
00800, and there were two each of libellula 00000 and 10845, three of 
libellula 00300—one of these appeared pale greyish when it contained the 
animal, but light yellow without it, resembling some shells I took at Cray- 
ford, in Kent (Sci. Gos. 1884, p. 236), and one each of libellula 128(45), 
rubella 00000, 128(45), and (12)3(45), olivacea 00009, and castanea 0, ; ,0, 
00, ,0,and 00,00. Several of these are not mentioned in Moquin-Tandon’s 
list of French varieties. The three last mentioned are instructive, as 
showing the gradual disappearance of the bands, 1 and 5 being the first to 
go, then 2, 4, and lastly 3. This rule does not hold good in all cases, 
however. Seventy-five examples of C. acuta were sent, and it is very 
remarkable that not one is of the typical (banded) form, most being strigata, 
but many altogether without markings.—T. D. A. CookerEtt (51, Wood- 
stock Road, Bedford Park). 
INSECTS. 
The Industry of Bees.— Few people have any idea of the labour 
expended by bees in the gathering of honey. Here is a calculation which 
will show how industrious the “ busy” bee really is. Let us suppose the 
insects confine their attention to clover fields. Each head of clover contains 
about sixty separate flower-tubes, in each of which isa portion of sugar not 
exceeding the five-hundredth part of a grain. Therefore, before one grain 
of sugar can be got, the bee must insert its proboscis in 500 clover-tubes. 
Now there are 7000 grains in a pound, so that it follows that 3,500,000 
clover-tubes must be sucked in order to obtain but one pound of honey. 
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