HELIX NEMORALIS. 293 
Many of the different variations of bandings that have been observed 
have been distinguished, more especially by F rench authors, by the apphi- 
cation of deena names and I have listed under their appropriate ground 
colouring all the forms so treated at present known to me. 
Without taking account of the varied widths of banding and interspacing, 
interrupted bands, or their degree of pigmentation, shade of colouring or 
transparency, there are, when the number of bands does not exceed the normal 
five, 89 possible variations. 
Though the number of possible band combinations im the shell are so 
numerous, and all have now been actually recorded or are known to have 
oceurred, yet it is surprising how few of these are really commonly found. 
‘The commonest banded forms in this country are 00300 and 00345, and 
some of the combinations of 12345; the relative persistence of the banding 
being shown by the sequence 84521; the third or peripheral band is not 
only “the most persistent, but is the first to be developed on the growing 
shell and is the longest; the basal or fifth band being the last to appear 
and is usually the shortest. 
The five-banded group contains sixteen varieties, and includes several 
of our commonest forms, and although one formula has not hitherto been 
reported from the British Isles, there can be little doubt that it exists in 
this country. 
234.5 (3) Aaa (12)(345) oe 
(12345) (123)(45) (12)(84)5 1(23)(48) 
(1234)5 12(345) ~ (12)3(45) 12(34 
1(2345) (12)345 12346 123(45) 
Of these the commonest are perhaps 12345, (123)(4 oy and Ee 
somewhat rarer or more local are (12345), 1(23)(45), (12)345, (123)45, 
1(23)45, and 123(45). ‘The remainder are all comparatively rare, but have 
been met with several times in this country, and recorded from the couti- 
nent: but 12(34)5 has only been found in Germany, Belgium, and Virginia, 
U.S.A., and has not yet been found in this country. 
he four-banded section embraces twenty-eight different forms, and 
includes a large proportion of the rarest formule. 
12340 12(34 )0 120(45) OC23i4 5) 
0(234)5 
(1234) 0 LSP SA 
(123)40 
The commonest formule are 10345, 12045, and 02345. 
(123,105 
7 
(12)0(45) 
(0) a} ah 
ae 
(12)(34)0 (12 )305 10(345) 0(23)45 
(12)340 1(23)05 10(34)5 02(345) 
1(234)0 ieee Oao 103(45) 02(34)5 
1(23)40 (12)045 Ore 3455 023(45) 
Very much rarer 
are (1234)0, (123)40, (12)340, (12)(34)0, (12)305, and 12(34)0, which are 
on record for ane only, and have never yet been met with im the 
British Isles. As exe ‘eedingly rare British forms, not hitherto recorded 
from abroad, mention may ie en: ((234)5 reported by Mr. J. H. Ashford: 
123(05) reported by Rev. Canon Horsley and Mr. B. Hudson ; 10(345) by 
Mr. C. E.W right; 02(34)5 by Prof. Coc ‘kerell and Mr. Ashford; and LO(34)5 
by Rev. Canon Horsley ; while 1(23)05 is only known from Ireland, col- 
lected by Miss Smith at Piperstown, Co. Louth. 
The remaining forms have all been found in this country and also 
abroad, but are very rare, and probably exist in very few collections. 
