PKOCEEDINGS OF THE MALACOLOGICAL SOCIETr. ' 75 



ORDINARY MEETING. 



Fkiday, 11th March, 1904. 



E. R. Sykes, B.A., President, in the Chair. 



Dr. "W. G. Ride wood gave a resume (illustrated by lantern slides) 

 of recent work upon tlie gills of Pelecypods. He reviewed briefly 

 the main types of sti'ucture found in the gills, and pointed out the 

 great variability noticeable in the more specialised forms. He then 

 dealt somewhat fully with the gill structure of Eiieiroa and Verticordia., 

 and finally traced the gradation from the gills of these genera to the 

 aberrant condition in the Septibranchia. 



The following communications were read : — 



1. "Description of a new species of Opistliostoma from Borneo." 

 By E. A. Smith, I S.O. 



2. " New species of Mollusca from New Zealand." By Rev. "W". H. 

 Webster, B.A. 



The following specimens were exhibited: — 



By B. B. Woodward : Original illustrations and photographs of 

 original illustrations of all figured species of Opisthmtoma^ with 

 photographs of five unfigurcd species. 



By Rev. R. Ashiugton Bullen : A living specimen of Testacella 

 scutulum from St. Mary Cray, also eggs and isolated shells. 



By E. R. Sykes : Valves of Avjomia striata, Brocchi, Macoma 

 calcarea, Chem., and Astarte borealis, Chem., from 70 miles olf the 

 Fastnet, and specimens of Cassidwria riigosa^ Linn., from the west 

 coast of Ireland. 



ORDINARY MEETING. 



Friday, 8th April, 1904, 



E. A. Smith, I.S.O., in the Chair. 



The following communications were read : — 



1. "Descriptions of new species of non-marine shells from Java 

 and a new species of Corbicula from New South Wales." By the 

 Rev. R. Ashington Bullen, F.L.S. 



2. "The Hawaiian species of OpeasJ^ By E. R. Sykes, B.A. 



3. "Report on a small collection of Helicoitls from British New 

 Guinea, with description of a new species." By G. K. Gude, F.Z.S. 



4. " On some non-marine Hawaiian Mollusca." By C. F. Ancey. 



