Qnaiieiiy Journal of Concholo^y 2)Zo 



''there for some time, and Lrouglit ever a number which he 

 " divided into little colonies : one at Vazon Bay, another at the 

 " Vale Cattle, and about a dozen and a haif which he sent me to 

 " try in Sark. I put them on t!ie right bank, going down to the 

 " Tort du Moulin, and for a tew years after occasionally found 

 " a shell or portions of shjll near a stone, where a thrush or black- 

 " bird had had a meal, 'ihus I fear they have all vani:=hed, for it 

 *• is nqw some years sinv.e i have been any. . . . My brother 

 '•died in 1863." 



1 his at once settles the question, for it is obviously unneces- 

 sary to abhume a second Uitrouuction since 1873, simply because 

 Mr. Rimmer did not find the shell at Vazon Bay in that year. 

 No doubt its range was much less extensive then than it is now. 

 It is noticeable too that the cap.ibilities of the new colonies for 

 sustaining life varied directly with the exposed nature of their 

 situation. That at Sark, on rather high and rocky ground, 

 probably never took root at allj that at the Vale Castle, in spite 

 of its north-eabterly outlook, was on a far more congenial soil, and 

 consequently survived until 187^ or later; while that at Vazon, 

 planted on low lying ground, and facing the N.W, has lived and 

 flourished, althoug,h doubtless, like Dr. Jeffreys' importations to 

 Swansea, after the pa.ent stock had died out, the new brood took 

 some time to establish itself permanently. 



It only remains to inform Concholcgi^ts, in case they are at any 

 future time |)Lrplcxed by findu g dead shells (ui IJelix poiiiaiia at 

 Guernsey, that Dr. Lukis tried the same experiment with that shell 

 ab hedid with Ileuxpisana, Ijut apparently ,, iihout tlie same sucecbs. 



JJELIX riSANA, MuLLER. 

 By G. Sherriff Tye. 



Mr. Richard Rimmer's couiteou> ob. eivations upon my notes 

 on this mollusk were read by me w.th much iiiterest, and 1 accoid 

 to him with pleasure all the credit beh-nging to him as beii g the 

 first to observe this bpecies in Guernsey, as I, like him, set the 

 ttuth before any personal vanity. 



