212 JOUKNAI, OF CONCHOLOCY, VOL. I3, NO. 7, JULY, I9II. 



" T. mange i Fer. 



AViLTS. S. — Fields near Devizes, Mr. Cunnington (Woodward's 



Manual, 1875, P- 298). 

 Glamorgan.-^— Bridgend, under leaves, in a little wood, July 1885 ! 



C. G. Barrett." 



^ Mr. A. S. Kennard has found T. maugei in a deposit of Holo- 

 cene rainwash at Porlock. 



The records for "Leigh Woods" and "fields near" Devizes are 

 too ancient to allow of discovering to what extent the ground was 

 wild, and I have also failed to gain any information about the "little 

 wood " at Bridgend ; but these last three records seem to indicate 

 wild, natural ground. 



It will be noticed that most of these records refer to the neigh- 

 bourhood of the Bristol Channel, one to Bedford, and one to Surrey. 



'^I'he Bedford record does not seem to have been confirmed later, 

 and possibly referred to gardens, as I never heard of TestacelUc in 

 the county when I used to explore it many years ago. 



The locality of the Surrey record is well known to me, and must be 

 considered as adjoining cultivated ground. In two old-establisiied 

 nursery gardens in the neighbourhood both T. haliotidea and T. 

 sciituluin are common. Indeed both these species are to be found 

 in many gardens from Dorking to Nutfield, a distance of eleven miles, 

 but hitherto not in uncultivated ground. 



The doubtful records, then, are practically narrowed down to the 

 neighbourhood of the Bristol Channel, and the following facts favour 

 the probability of the genus being indigenous in this district. 

 I. — All the three species are mentioned in the records. 

 2. — Judging by the foreign distribution of T. vuuigei, the locality is 



one in which we might expect it.'' 

 3. — The autochthonous character of T. maugei is confirmed by the 



occurrence of the Holocene shell, though it must not be forgotten 



that rainwash records are by no means always conclusive proofs 



of antiquity. 



That the genus is indigenous in other parts of Britain also is pos- 

 sible ; but, I think, the evidence of these "garden" records is hardly 

 convincing, and one cannot help wondering to what extent its British 

 distribution is due to transportation in plant mould, either direct from 

 continental nurseries, or from British nurseries which have been sup- 

 plied from those on the Continent. It is easy to understand how these 



1 Monograph, vol. ii., Appendix, p. 263. 



2 See Map in Monograph, p. 26. 



