3l8 JOURNAL OK CONCHOLOGY, VOL. l6, NO. 10, OCTOBER, I922. 



practically all the shells examined were above the average size 



generally attained by H. nemoralis in this locality. Only in two 



colonies can the two species be said to be truly associated ; in all the 



Other colonies either only one species is found or there is a clear 



line of demarcation between the two species, and it is generally found 



that H. hertensis prefers situations that are shaded and slightly damp, 



while H. nemoralis is to be found in drier and generally open 



situations. 



♦-^•^ 



PROCEEDINGS OF THE 

 CONCHOLOGICAL SOCIETY OF GREAT BRITAIN & IRELAND. 



508th Meeting, held at the Manchester Museum, February ist, 1922. 



Mr. R. Standen in the chair. 



Candidate Proposed for Membership. 

 Colonel E. C. Freeman, M.D., Angel Corner, Bury St. Edmunds (introduced 

 by Col. A. J. Peile and J. R. le B. Tomlin, M.A.). 



Resignation. 

 C. P. Jenkinson. 



Members Deceased. 

 T. S. Hillman. J. S. Gladstone. 



Paper Read. 

 " Notes on the Nomenclature of Hygroinia, Helicella, etc.," by Hugh Watson, 

 M.A. 



Principal Exhibits. 

 By Mrs. Gill : Species of Pterocera, including growth stages. 

 By Mr. W. H. Davies : H. nemoralis (15 mm. diam. ) from Deep Dale, near 

 Buxton, for comparison with specimens (24 mm. diam.) from Baguley, Cheshire. 

 The Special Exhibit was British Vertigo. 



509th Meeting, held at the Manchester Museum, March ist, 1922. 

 Mr. G. C. Spence in the chair. 



New Member Elected. 

 Colonel E. C. Freeman, M.D. 



Candidate Proposed for Membership. 

 H. de W. Marriott, 15, Northenden Road, Sale, Cheshire (introduced by A. K. 

 Lawson and J. W. Jackson). 



Paper Read. 

 "The Significance of Dominant Euadeniates in Africa," by John W. Taylor, 

 M. Sc. 



Principal Exhibits. 

 By the Rev. L. W. Grensted : Paliidestrina jenkimi (smooth and carinate) 

 from drain leading from reservoir at Levenshulme, Manchester (February, 1922). 



By Mr. W. H. Heathcote : Large series of freshwater species from Hutton 

 Marsh, near Preston, associated with brackish-water Crustacea, etc. 

 The Special Exhibit was " British Pupilla." 



