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1. Fishes - arranged by C. Tate Regan. 2. Corals - Arranged by W.D. Lang and H.D. Thomas, including trends in corals. 3. Mammals - Arranged by M.A.C. Hinton. 4. Birds - Arranged by P.R. Lowe and N.B. Kinnear, including geographical and other variations. 5.Molluscs - Arranged by G.C. Robson, including local variation, abnormal left-hand hectocotylus in Octopus. 6. Newts and Lizards - Arranged by H.W. Parker, including hybridisation experiments in Newts, local races of Lacerta muralis. 7. Polyzoa - Arranged by A.B. Hastings. 8. Insects - Arranged by D. Aubertin.

1. Segregation in partially diploid and partially tetrapoid species in Nicotiana - Arranged by Dr. F.G. Brieger. 2. The genetics of intellect - Arranged by Dr. C.C. Hurst. 3. Colour varieties of the Mouse - Arranged by Dr. I.H. Grunberg and J.B.S. Haldane. Mutant types of Drosophila melanogaster - Arranged by Miss U. Philip. 4. Blood grouping - Arranged by Mr. P.K. Gorer. 5. Cytology of Orthopetra - Arranged by Mr. M.J.D. White. 6. Cytological observations of Drosophila and maize bearing on the theory of crossing over - Arranged by Dr. C.D. Darlington. 7. The influence of temperature on chiasma frequency and crossing-over - Arranged by Mr. M.J.D. White.

1. Annual business meeting 2. Demonstration in the Department of forestry. 3. Demonstration in the Department of comparative anatomy. Includes candidates selected under Rule 6 - Dr. H. Donald, Dr. A Greenwood, Dr. A. Haddow, Dr. T.E. Nichols, Mr. N.W. Simmonds. Candidates previously nominated as temporary members under Rule 9 - Dr. G.P. Carson, Mr. J.L. Crosby, Miss P.M. Priestly.

1. Nature of lethals in Drosophila melanogaster - 1. Experimental - Arranged by D.G. Catcheside.; 2. Theoretical - Arranged by D.E. Lea. 2. Genetic aspects of heterokaryosis - G. Pontecorvo. 3. Meiosis in some Asomycetes - Arranged by J.B.S. Haldane and H.L.K. Whitehouse. 4. Experiments imitating tumour development - Arranged by P.T. Thomas. 5. Mutation-rate of Retinoblastoma in Man - Arranged by U. Philip and A. Sorsby.

Genetical Relations of Plants and Animals to their Pests and Diseases, including: 1. J. Hammond - Constitution in Cattle in relation to Disease 2. M.S. Pease - Observations on heritable Disease in Poultry 3. J.G. Carr - Heritable Susceptibility of Poultry to Cancer Virus 4. W. Black - Inheritance of Blight Resistance in Potatoes 5. G. Cockerham - Genetical Aspects of Resistance to Potato Viruses 6. T.J. Jenkin - Disease and Pest Problems at the Welsh Plant Breeding Station Includes call for papers

Papers presented by: 1. P.S. Nutman: Inheritance in red clover of resistance to infection by nodule bacteria. 2. R.A. Fisher: The formal analysis of linkage in tetrasomic inheritance. 3. M.J.D. White: The chromosome cycle and anomalous spermatogenesis of the paedogenetic midge, Miastor. Includes candidates selected in accordance with Rule 6, and candidates previously nominated under Rule 9.

Papers presented by: 1. J.A. Fraser Roberts - 'Somke further observations on the difference between the sexes in dispersion of intelligence'. 2. W.J.B. Riddell - 'Conditionality dominant sex-linked nystagmus'. 3. L.S. Penrose - 'On the familial appearance of maternal-foetal incompatability'. 4. H. Kalmus - 'Genetical antigenic incompatability as a possible cause of the toxaemias occuring late in pregnancy'. 5. R.R. Race - 'Rh antigens and antibodies: Fisher's synthesis'. 6. A.E. Mourant - 'Some "new" blood groups'. Two copies of programme.

Papers presented by: 1. S. Dickinson - "Fungal Genetics". 2. E.M. Blackwell - "The morphology of the strains of certain heterothallic Fungi and the terminology of the organs of fusion". 3. P.T. Thomas - "Some aspects of the cytology of Fungi". 4. A.F. Parker Rhodes - "Phenogenesis in Fungi". 5. E. Sansome - "Mutation in Fungi Imperfecti with special reference to Pencillium notatum". 6. G. Pontecorvo - "Genetical aspects of heterokaryosis". 7. K. Mather - "Genetical flexibility and the breeding system in Fungi".

Papers presented by: 1. M.B.E. Godward - "The nucleolus and nucleolar organisers in Spirogyra" 2. D.G. Catcheside - "The B-chromosomes of Parthenium argentatum" 3. R. Sanger and R.R. Race - "Subdivision of the blood group MN in man : linked loci or multiple allelomorphs?".

Papers presented by: 1. R.E. Billingham and P.B. Medawar - "New observations on the 'infective' spread of natural skin pigmentation in rodents". 2. E.A. Bevan - "Mycetozoa and genetical research". 3. H.G. Callan - "The breakdown of chiasma interference in inter-change associations". 4. E.B. Lewis - "A study of adjacent genes".