HORSLEV : LAND SHELLS OF MAJORCA. 69 



am not clear that the series found at Belver Castle is the same as the 

 larger form from other places in the island. 



H. rupestris was plentiful on a limestone wall near Inca. The 

 sandstone about Palma is probably too rough for it. This is not in 

 Dr. Hidalgo's list for Majorca, though recorded from Minorca. 



H. acuta is common almost everywhere, but was much smaller 

 than in England. Adults seemed very few proportionately to the 

 young of this year. These young ones, about the size of Pupa secak, 

 I found clustered by hundreds on twigs of a hawthorn, looking like 

 some disease of the tree. The variety articulata, and even var. 

 7iigrescens, I found at Belver Castle and elsewhere. 



Leucochroa cariosula apparently hybernates early, for though 

 dead shells were innumerable on rocky slopes near the sea, I found 

 but few living specimens, and they all under stones. It forms a white 

 paper-like operculum. The absence of a periostracum may cause 

 specimens to be passed over as dead and bleached when they are not 

 so. 



Vitrea cellaria. — One specimen I found at Belver, but this was 

 the only Vitrea I saw anywhere though turning over thousands of 

 stones. 



Stenogyra decollata was common on some hills under stones. 

 I think it seemed to prefer a south aspect. 



Ferussacia folliculus swarmed under stones, but was local. I 

 found it more by waysides than elsewhere, and it probably requires 

 more moisture than it would get on the steep and stony hills. It 

 resembles Zua lubrica, but is larger and more acuminate, and the 

 animal has a noticeable greenish yellow foot. 



Pupa umbilicata I took from stones on the top of an old wall 

 near Inca, but noticed none elsewhere. On the same wall I found 

 two specimens of a small shell which I could not determine, acuminate, 

 with six denticles, possibly it was Pupa polyodon. 



Clausilia bidens var. virgata abounded everywhere. One day 

 I counted sixty-one specimens under one stone about six inches by 

 four. As far as I could see this was the only species to be found, 

 though I expected others on the stony walls (hedges are unknown) 

 and rocks. 



Tudora ferruginea (called by some Cydostoma fulvuvi) was 

 common under stones by the sea and on the hills. It is of a warm 

 purplish brown colour, but a clear yellow variety I found occasionally. 



Shells of the H. lucasi group are the terror of collectors as such 

 innumerable specific names are given to their varieties by continental 

 conchologists. There seemed to me to be three species, distinct 

 though of similar habits, form and markings. 



