COOPER : MONSTROSITIES. l8l 



New Members Elected, 



A. J. Arkell, Hinxhill Rectory, Ashford, Kent. 



E. Stainton, 70, Jubilee Road, Doncaster. 



Candidate Proposed for Membership. 

 Alan Gardiner, B.Sc. (Lond.), Quies, Porchester Road, Newbury (introduced by 

 J. W. Taylor and L. J. Shackleford). 



Resignation. 



F. W. Fierke. 



Revision of the List of Members. 



In accordance with Rule 4, the following names were reported as having been 

 struck off the Roll :— 



iSIessrs. G. W. Brindley, C. S. Carter, H. F. Edgar, H. Fogerty, F. M. 

 Gripper, R. C. Harrison, J. W. Milton, A. H. L. Newstead, S. Pace, C. Pannell, 

 M. K. Saggu, T. Sheppard and J. F. Winkworth. 



Papers Read. 



" Caecilioides acicida, Vallonia excenirica, etc., in Denbighshire," by J. W. 

 Jackson, F.G.S. 



" The Radula of Hyalinia, I.," by Prof. A. E. Boycott. 



" The Radula of Hyalinia, II. : Variation in the Radula of H. helvetica " by 

 Prof. A. E. Boycott. 



" Notes on Helicigona," by E. Collier. 



Exhibits. 



By Mr. R. Standen : A very beautiful specimen ui Liinax Jlavus var. coltibrina, 

 collected at Newport, Isle of Wight, December, 1913, by Mr. Frank Morey. 



In the special exhibit of the evening, the genus Helicigona, Mr. Ed. Collier 

 showed an extensive series, comprising most of the known species. He gave an 

 interesting account of the chief characteristics of the various sections into which the 

 genus is subdivided. Mrs. Gill also exhibited a number of fine examples of the 

 genus. 



Monstrosities of Tapes pullastra and Mactra stultorum. — The two shells 

 figured were found in Studland Bay, Dorset, on March 25lh, 1913. The Tapes 

 pullastra is remarkably narrow and is much swollen. It bears a superficial 

 resemblance to the variety ovata (which also occurs in the Bay), but it is really a 

 monstrosity as its curious form is due to the abrupt truncation of the anterior end. 



Studland Bay has also yielded me some abnormal forms of Tapes aureus. The 

 iMacira stulforinu mimics a Corbula in shape. The smaller valve is flattened, while 

 the laiger is more tumid than usual. I am unable to suggest any cause for this 

 monstrosity. — J. E. Cooper {Read before the Society, May 21st, 1913). 



