65 



JOURNAL OF CONCHOLOGY. 



Vol. 13. JULY, 1910. No. 



ON THE HABITAT OF VITRBA LUCID A (Drap.) 



AT GRANGE-OVER-SANDS. 



By J. WILFRID JACKSON, F.G.S. 



(Read Ijefore the Society, November lotli, igog). 



In 1903, whilst spending a holiday at Grange-over-Sands, I had the 

 good fortune to come across two examples of Viirea lucida (Drap.) 

 (one dead and one living) whilst working the cliffs on Lindale Road for 

 mollusca. This addition to the Census was recorded in a paper 

 I wrote in conjunction with Mr. C. H. Moore.-^ This discovery 

 remained unique for several years, and in 1906^ I expressed the 

 opinion that the shells might have arrived there with greenhouse refuse, 

 probably thrown down from gardens above. I had not, however, 

 then visited the top of the cliffs and could only judge from down 

 below. On the occasion of the joint ramble of the Society to Grange 

 on June icth, 1908, another specimerf (dead) was taken by Mr. J. 

 Davy Dean,^ and in August of the previous year Mr. G. H. Taylor 

 found an empty shell of this species on the cliffs.^ In 1908 I visited 

 Grange again in company with Mr. R. Standen and Mr. J. Kidson 

 Taylor, and a systematic search among the herbage on the cliffs 

 resulted in the acquisition of fourteen examples,* all adult and half 

 the number living. The largest, found by my wife, measured 15 mm. 

 in diameter. These were all found on the rock-ledges at no great 

 distance from the ground. 



This year I have had exceptional opportunities of thoroughly 

 investigating the habitat, having obtained permission to explore the 

 wood and grounds above the cliffs. The habitat, which forms part of 



1 /. of Conch., X 



2 /. of Conch., X 



3 J. of Conch., X 



4 /. of Conch.. X 



5 /■ of Conch., X 



