“…Fetal hemoglobin is also detected in the monkey, ox, goat, sheep and mouse (Ingram 1963). The ontogeny of multiple molecular forms of hemo globin has also been studied in the developing chick embryo (Fraser I96U, Huisman and Schillhorn van Veen I96I4., D'Amalio and Salvo I96I, Manwell et al 1963, and Simons 1966 and among adult and larval frog hemoglobins (Herner and Riggs I963, Baglioni andSparks 1963, Elzinga 196k, andManwell 1966a).…”