870 EXPERIMENT STATION RECORD. 



On the inheritance of the webfoot character in pigeons, J. L. Bonhote 

 (Proc. ZooL Soc. London, 1911, I, pi). l-'i-19, figs. 2). — ^A report of work which 

 confirms the results of others that the webfoot behaved as a Mendelian re- 

 cessive, but in which the normal course of Mendelian inheritance was distorted 

 when two strains of webfeet vvere mated, although each strain by itself bred 

 true. " We must, therefore, be driven back to the suggestion that a factor 

 composed of two parts (cryptomeres), one of which is contained in each strain, 

 causes the web to be suppressed or concealed." 



[Experiments in pheasant breeding'], R. H. Thomas {Proc. Zool. Soc. Lon- 

 don, 1911, I, pp. 6-9). — Thaumalca ohscura appeared to be a hybrid recessive 

 mutation, breeding true, and was produced by crossing T. amhersti and T. picta. 

 " By whatever name it is called, this hybrid is undoubtedly a homozygote for 

 pattern and color, pure and permanent, transmitting these characters to its 

 descendants. Cross-breeding between these two varieties of Thaumalca pro- 

 duces a new form, owing possibly to the meeting of characters never previously 

 combined, and as they are constant it is evident these have an affinity and have 

 become inseparable. 



" On such lines evolution might be conceived as having proceeded fairly 

 rapidly towards the separation of species." 



Investigations in North America on current problems of inheritance, 

 E. VON TscHEBMAK (ScUv. Vcr. Natww. Eenntnisse Wien, 51 (1910-11), pp. 

 49-7 Jf). — ^A popular account of methods and results accomplished in North 

 America by experiments in hybridizing and selecting. 



Heredity and evolution, L. Plate (In Festschrift Richard Herttoig. Jena, 



1910, vol. 2, pp. 535-610, pi. 1, figs. 3; abs. in Jour. Roy. Micros. Soc. [London], 



1911, No. Jf, p. 453). — Breeding experiments with mice led the author to have 

 complete confidence in the Mendelian theory of the purity of gametes, and he 

 maintains that Mendelism does not lessen the importance of selection, the con- 

 ception of determinants being quite consistent with the transmission of acquired 

 characters. Seven different modes of germinal variation and five kinds of 

 Tttavism are given in an analysis of correlation. The author " proposes to 

 modify Bateson's ' presence and absence ' theory into a ' grundfaktor supple- 

 ment-theorie.' " 



Evolution, P. Geddes and J. A. Thomson [London, [1911], pp. 256). — A re- 

 sume of the evidence of the evolution of species as gathered from the study of 

 variation, heredity, embryology, and paleontology. 



Bibliographia evolutionis (Bui. Sci. France et Belg., 44 (1910), Bihliogr. 

 Evolutioms, 1 (1910), pp. 162). — This is a bibliography of current works on 

 heredity, variation, general cytology, experimental biology, and related topics, 

 with abstracts of each noted. It is appended to each number of the journal, 

 with separate pagination. 



Commercial feeding stuffs, W. J. Jones, Jr., F. D. Fuller, and C. Cutler 

 (Indiana Sta. Bui. 152, pp. 167-403, fig. 1). — This contains a summary of the 

 state feeding stuffs law, rulings made under it, a classification of feeding stuffs, 

 and similar data. Analyses are reported of 2,533 samples of feeding stuffs, 

 including the by-products of wheat, rye, buckwheat, corn, flax, oats, and cotton- 

 seed; distillers' grains, brewers' grains, sugar beet pulp, alfalfa products, 

 animal by-products, and condimental, poultry, and mixed feeds. 



Commercial feeding stuffs of Pennsylvania in 1910, J. W. Kellogg et al. 

 (Pemi. Dept. Agr. Bui. 208, pp. 213). — Analyses are reported of cotton-seed meal, 

 linseed meal, corn-oil meal, distillers' grains, brewers' grains, malt sprouts, 

 gluten feed, hominy feed, corn bran, alfalfa meal, beet pulp, beef scrap, meat 

 meal, mixed feeds, and by-products of wheat, rye, and buckwheat. 



