Character fixation and its relationship to the F₂-derived line method of soybean breeding. J.C. Thorne, C.R. Weber and W.R. Fehr. 271

A catalogue of the Iowa State University collection of Iowa mammals. Milton W. Weller and William S. Blagen. 279

Sheath and collar feeding resistance tot h second-brood European corn borer in six inbred lines of dent corn. W.D/ Guthrie, J.L. Huggans and S.M. Chatterji. 297

Migration expectations and performance of open-country young adults: a longitudinal study, 1948-1956. Dead R. Yoesting and Joe M Bohlen. 355

Mark and recovery estimates of fish populations in Clear Lake, Iowa 1958 and 959. James A McCann and Kenneth . Carlander. 369

Abundance estimates of selected zooplankton species in Clear, Lake Iowa, by two sampling methods. Ross V. Bulkley and John A. Scheider. 405

An estimate of the largemouth bass population in Clear Lake, Iowa, 1964. J. Douglas Thompson and Kenneth D. Carlander. 411