100 Experimental Evolution, Variation, and Heredity 



coloration and patterns. A general discussion closes the book, in which there are 

 considered the relation of heredity to ontogeny, the significance of dominance and 

 recessiveness, potency, reversion and the factor hypothesis, the limits of selection, 

 non-inheritable characters, and the role of hybridization in evolution. The volume 

 is illustrated by twelve lithographic plates of plumage coloration. 



No. 122. (Paper No. 15, Station for Experimental Evolution.) 

 JOHNSON, R. H. Determinate Evolution in the Color Pattern of Lady Beetles. 

 Octavo, iv+104 pages, 92 text figures. Published 1910. Price $1.00. 



A study of the life and habits, color patterns, variability, modificability, distribu- 

 tion, heredity, and evolution of the "lady bird" beetles, based on several years of 

 statistical and experimental study of all the American species, including several new 

 species and varieties. The studies on Hippodamia convergens, glacialis, and spuria; 

 Coccinella novemnotata; Adalia bipunctata and frigida; and Epilachna are the most 

 detailed and to the greatest extent experimental. Variation is found to be both con- 

 tinuous and discontinuous, with a tendency to be disposed about centers. The color 

 pattern is modifiable by environment, and some of the modifications are inheritable 

 characters. The distribution does not follow formulated laws of evolution by iso- 

 lation. Heredity, while usually segregate, frequently gives little evidence of discrete 

 unit characters. 



No. 143. (Paper No. 16, Station for Experimental Evolution.) 

 LUTZ, FRANK E. Experiments with Drosophila ampelophila, concerning Evolution. 



Octavo, ni+40 pages, 53 text figures. Published 1911. Price $0.50. 

 This paper treats of the effect of artificial and sexual selection upon abnormal 

 wing-venation, of the characteristics of this venation, and of its inheritance. A 

 series of experiments, in which it was found that no degeneration accompanied dis- 

 use continued for more than forty generations, is briefly discussed. 



No. 144. (Paper No. 17, Station for Experimental Evolution.) 

 CASTLE, W. E., and J. C. PHILLIPS. On Germinal Transplantation in Vertebrates. 



Octavo, 26 pages, 2 plates. Published 1911. Price $0.50. 



The authors have succeeded in two instances in transplanting the ovaries from a 

 guinea-pig of one color variety to a guinea-pig of a different color variety, with the 

 result that the transplanted ovaries afterward functioned in their new environment 

 and produced living young. These resembled the animal from which the ovaries 

 were originally taken, not one in which the young developed. This result shows 

 the correctness of Weismann's view that the body is merely the container of the 

 germ-cells and in no wise determines their character. The paper contains also a 

 critical review of the extensive literature on the transplantation of ovaries and 

 testicles, with a bibliography of the same. 



No. 179. (Papers Nos. 18 and 19, Station for Experimental Evolution.) 



CASTLE, W. E. Reversion in Guinea-pigs and Its Explanation. Oc- 

 tavo, 10 pages. 



LITTLE, C. C. Experimental Studies of the Inheritance of Color 



Published 

 1913. 

 Price 

 $2.00. 



in Mice. Octavo, 92 pages, 5 colored plates. 



Dr. Castle's paper treats of an ancestral or atavistic coat-character of the guinea- 

 pig present in most wild rodents but frequently absent in their tame varieties and 

 which may be obtained by crossing certain domesticated varieties of guinea-pig. 

 A full account is given of how the reversion in question may be secured, how its 

 reappearance can be accounted for, and in what way the recovered character may 

 be "fixed" or reestablished as a racial character together with the complete data 

 which form the basis of this account. 



Dr. Little analyzes the observed phenomena of color inheritance in mice on the 

 basis of mendelian heredity and shows the relations of the various factors involved 

 in the production of colors, to each other and to the coat and eye colors produced. 

 The paper includes the analysis and description of the color factors and gives the 

 experimental data on which the conclusions are based. Colored plates show the 

 typical color varieties of mice. 



