ISOLATING MECHANISMS AND SPECIATION KITZMILLER, J. B., and LAVEN, H. Speciation in mosquitoes 161 1. J.B. KITZMILLER. Race formation and speciation in mosquitoes 161 2. H. LAVEN. Speciation By Cytoplasmic Isolation 166 3. J. B. KITZMILLER and H. LAVEN. Evolutionary Mechanisms 173 BAKER, H. G. Reproductive methods as factors in speciation in flowering plants 177 WALLACE, BRUCE. The influence of genetic systems on geographical distribution 193 FOSSIL RECORD AND RATES OF EVOLUTION KURTEN, B. Rates of evolution in fossil mammals 205 ANDREWS, H. N. JR. Evolutionary trends in early vascular plants 217 HEBERER, G. The descent of man and the present fossil record 235 HUNT, EDWARD E., JR. The continuing evolution of modem man 245 TRENDS OF EVOLUTION SIMPSON, G. G. The nature and origin of supraspecific taxa 255 SMITH-WHITE, S. Chromosome evolution in the Australian flora 273 RENSCH, B. Trends towards progress of brains and sense organs 291 STEBBINS, G. L. The synthetic approach to organic evolution 305
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