MCMURTRIE : EIGG SHELLS. II7 



fully grown, though they have the labial rib. A speci- 

 men with the upper whorls normal (except that they 

 approach var. pallida), but the lower and larger part of 

 the body whorl is membranous. The animal's power of 

 secreting calcareous matter seems to have suddenly failed ; 

 there is, nevertheless, a perfect lip with the usual rib. 



Helix arbustorum var. flavescens Moq. A perfect speci- 

 men, and one broken, probably by a thrush. This variety 

 is unicolorous, somewhat solid, dull, and darker than the 

 nsn^X flavescens. South end, near the sea. About eight 

 specimens from more than one point of the south end 

 locality, but chiefly from the corrie opening to the sea, 

 among debris of basalt, were pale yellowish, almost trans- 

 parent, bandless, with a few white markings ; thin, some- 

 times excessively thin, so that the shell collapsed on 

 removing the animal, though great care was taken ; they 

 may be referred to the var. iderina. 



Helix arbustorum var. cincta Taylor. South end, near 

 the sea. 



Helix arbustorum var. fusca Fer. Very thin, semi-trans- 

 parent, brown with the usual markings and peripheral 

 band. South end, near the sea. 



Helix granulata Alder. South end, under stones near the 

 sea ; of a good size. 



Helix itala L. Grassy banks near the sea, and among 

 grass and stones on gently sloping shores ; plentiful at 

 foot of glebe. On the west shore near Lagg the variety 

 leucozona prevails. The north shore was not visited, but 

 from the description received it is probable that the species 

 occurs there. Very thin specimens in the corrie at the 

 south end, as noted below. The var. grisescens Colbeau 

 is occasionally found with the type. 



Helix itala var. instabilis Ziegl. The shell tends to 

 this form throughout Eigg, and is smaller than in South 

 Britain. Both dark and white specimens are apt to have 



