TAYI.OK : MOLl.nSCA OF AUDKUICQ, PAS-DE-CALAIS. lOQ 



served by him as an interesting relic of the wrecking of his quarters 

 by an enemy bomb, tlie animal being killed and shell damaged by the 

 explosion. The var. fasciata Moq. is present in quite a number of 

 mutations. The mut. quinquefasciata Shepp. (formula 12345) is re- 

 l^resented by several shells with the red or the yellow ground colour. 

 This form was regarded by its author as a species and as quite distinct 

 from the one-banded form. 



The mut. woodia Moq. formula 1(23)45 is an uncommon banding 

 in this country and abroad. This formula is only recorded from the 

 continent in the yellow variety libellula; in Mr. Cribb's specimen the 

 markings are developed on a flesh coloured shell. The XTiWV. poiretia 

 Moq., formula (12)3(45), is a somewhat common form, but the shells 

 found by Mr. Cribb are flesh coloured — the strictly typical shell has 

 a yellow ground ; the mut. blainvUlea Moq , formula \ 2345 differs 

 only from quinquefasciata by the feeble development of the uppermost 

 band ; the mut. adansonia Moq., formula i \ 345, is characterized by 

 its ill-defined second band, and is represented by shells with flesh- 

 coloured and also with yellow ground ; the formula 00340 is one of 

 the commonest two-banded forms, and may be referred to the mut. 

 hrotia Locard, although the fourth band is only weakly developed, 

 whereas in typical forms of the mutation both bands are equally 

 developed and deeply pigmented ; the formula 00300 is well represented 

 and is known by the French as mut. cuvieria Moq. when the ground 

 colour of the shell is yellow and as mut. giiettardia Moq. when the 

 ground colour is red, though Moquin-Tandon by some oversight 

 also applied the name gcertneria to the same form ; a subsidiary 

 mutation has the peripheral band duplicated as 003300. Bouchard- 

 Chantereaux lists twenty-five varieties of this species, mostly band 

 formulae. 



Helix hortensis Miill. — There are twenty-six specimens of this 

 species, all gathered about Zutkerque. They are very varied in 

 character and probably the shells of this and the preceding species 

 are selected from a much larger number ; sub-var. tenuis Baudon, 

 very . pellucid, thin and of an unicolorous yellowish tinge ; var. 

 sauveuri Colbeau, described as a distinct species, and char- 

 acterized more especially by the white rib inside the aperture, the 

 violaceous-brown lip and the pale brownish stain Qn the penultimate 

 whorl ; usually reddish and bandless. In its lip characters it corres- 

 ponds with the var. biniai-ginata of Helix neiiioralis ; var. iutea Picard, 

 the bulk are referable to this variety, although only two shells possess 

 the white lip and rib, but all present in a more or less striking way 

 an orange-coloured apex. This modification if thought desirable may 

 be distinguished as var. aurafitia-lutea ; it corresponds to the var. 

 auratitia-libellula oi Helix nemoralis; var. coloraia Dum. and Mort. 



