Genetic divergence of Anadara trapezia populations 
Mayr, E. (1982). Speciation and macroevolution. 
Evolution 36: 1119-1132 
Nei, M., Maruyama, T., and Chakraborty, R. (1975). The 
bottleneck effect and genetic variability in 
populations. Evolution 29: 1-10. 
Poore, G.C.B. and Rainier, S. (1974). Distribution and 
abundance of soft-bottom molluscs in Port Phillip 
Bay, Victoria, Australia. Australian Journal of Marine 
and Freshwater Research 25: 371-411 
Provine, W.B. (1986). Sewell Wright and Evolutionary 
Biology. University of Chicago Press, Chicago. 
Richardson, B.J.R., Baverstock, P.R. and Adams (1986). 
Allozyme Electrophoresis - A Handbook for Animal 
Systematics and Population Studies. Academic Press, 
Inc. Australia. 
Smith, B.; Coleman, N. and Watson, J.E. (1975). The 
127 
invertebrate fauna of Westernport Bay. Proceedings of 
the Royal Society of Victoria 87: 149-155. 
Stanley, S.M. (1975). A theory of evolution above the 
species level. Proceedings of the National Academy of 
Science USA 72: 646-650. 
Wake, D.B., Yanev, K.P. and Frelow, M.M. (1989). 
Sympatry and hybridization in a "ring species": the 
plethodontid salamander Ensatina eschscholtzii . Pp. 
134-157 In D. Otte and J. A. Endler (eds). Speciation 
and Its Consequences. Sinauer, Sunderland, MA. 
White, M.J.D. (1978). Modes of Speciation. W.H. Freeman 
and Co., San Francisco. 
Wright, S. (1931). Evolution in Mendelian populations. 
Genetics 16: 97-159. 
Manuscript received 30 January 1996; accepted 25 July 1996. 
