Changes in Populations 159 



5-16. Summary paper with extensive bibliography. (Allison, 1956, is 

 the central reference on sickle-cell anemia.) 



Camin, J. H., and P. R. Ehrlich. 1958. Natural selection in water snakes 

 {Natrix sipedon L.) on islands in Lake Erie. Evolution 12: 504-511. 

 This is the principal paper on selection in N. sipedon. 



Clarke, B. 1960. Divergent effects of natural selection on two closely 

 related polymorphic snails. Heredity 14: 423-443. The bibliography 

 lists most of the important papers on Cepaea, including Sedlmair 

 (1956). 



Dobzhansky, T. 1951. Genetics and the Origin of Species. Columbia 

 Univ. Press, New York. The classic work on genetics and evolution in 

 animals. A "must" for every serious student. The early work on chromo- 

 somal polymorphism in Drosophila is summarized here. 



. 1959. Variation and evolution. Proc. Am. Phil. Soc. 103: 252- 



263. The bibhography of the paper will introduce the reader to more 

 recent evolutionary literature on Drosophila. The number of the Pro- 

 ceedings containing this paper has many articles of interest to the 

 evolutionist. 



. 1960. Evolution and environment. In Sol Tax [ed.], Evolution 



After Darwin, Univ. Chicago Press, Chicago, vol. 1, pp. 403—428. Con- 

 tains a good discussion of drift in Drosophila. 



Genetics and 20th Century Darwinism. 1959. Cold Spring Harbor Svm- 

 posia on Quantitative Biology, vol. 24. See especially Lamotte's paper 

 on Cepaea for his side of the drift-selection controversy, and the in- 

 teresting papers by Carson, Dobzhansky, and Mayr. 



Lerner, I. M. 1954. Genetic Homeostasis. Wiley, New York. Highly 

 theoretical and well worth reading (partly out-of-date) . 



. 1958. The Genetic Basis of Selection. Wiley, New York. This is a 



comprehensive source on artificial selection. 



Michener, C. D. 1958. Distinctive type of primitive social behavior 

 among bees. Science 127: 1046-1047. Evidence of the origin of 

 worker-queen differentiation. 



Sheppard, P. M. 1959. Natural Selection and Heredity. Hutchinson, Lon- 

 don. An excellent httle book covering much of the material in this 

 chapter. 



. 1961. Some contributions to population genetics resulting from 



the study of the Lepidoptera. Advances in Genet. 10: 165-216. See 

 this for further information and references on the Lepidoptera exam- 

 ples and a guide to the literature on disruptive selection. 



Stebbins, G. L. 1950. Variation and Evolution in Plants. Columbia Univ. 

 Press, New York. The plant equivalent of Dobzhansky's Genetics and 

 the Origin of Species. Summary and references for all plant examples 

 in this chapter— and much more. 



Waddington, C. H. 1961. Genetic assimilation. Advances in Genet. 

 10: 257-293. Summary and discussion of the work and literature. 



