62 



THE BRITISH NATURALIST. 



[April 



peregra, v. decollata i Anders.,) Wst., 1881, will want a name, and may 

 be changed to siihdecollata, as there is a prior decollata, Jeffreys, which 

 is not identical with it. — T.D.A.C. 



Notes. 



Mr. E. A. Smith read a very interesting paper at the Annual 

 Meeting of the Conchological Society, on the generic names of some 

 British shells. On the grounds of priority, he considers that we 

 should write Viviparus instead of Paludina, Vitrea for Hyalinia, and 

 Acicula for Acme. The paper is briefly reported in an account of the 

 meeting in the " Yorkshire Weekly Post " of Jan. 31st. 



Mr. J. Wilcock writes that he will shortly be able to make large 

 additions to the list of British Unionidae, 



Mr. A. J. Jenkins writes us concerning Pliysa acuta : — Mr. Rae 

 and myself have every reason to believe that the species has been 

 living and thriving in the warm water of the Banner Mill Ponds, 

 Aberdeen, for at least 15 years ; the mill foreman is positive that the 

 species was existing in these ponds when he first came to the mill — 

 15 years back. Adult live shells of P. acuta from this locality are fre- 

 quently quite white, the body whorl being much expanded, and the 

 outer lip reflected." 



The last point is specially interesting, because Regelsperger, in 

 1885, noticed deformities in the aperture of Physa acuta living in a 

 warm chalybeate spring. 



At the Annual Meeting of the Conchological Society, Mr. C. S. 

 Bell Cox read a paper on the occurrence Helix elegans, Gmel., near 

 Dover, where it has been introduced, and has formed quite a little 

 colony. Mr. Horsley sent the writer a specimen from this locality ; it 

 referable to the form hypozona, Moq., but the brown banding below 

 consists merely of sub-effaced brown lines. 



Plydvohia jenkinsi, var. ttuuida, Jenkins, is described in " Sci. Goss." 

 for Jan., p. g. It is from near Beckton, Essex, not Tilbury Marshes, 

 as was stated in "Journ. of Conch." 



In the "Proceedings of the Geological Association" for Aug., 1890, 

 'Sir. B. 15. Woodward has an interesting summary of the knowledge of 

 the Pleistocene Mollusca of tlic London district. On p. 381 it is 

 stated that I'lanovhis glabcv is not P. pawns, Say., as Dr. Dall com- 



