Effects of L-tryptophan on morphogenesis and growth in the early chick blastoderm Hadar EmanuelssonKjell Palén OriginalPaper Pages: 1 - 17
Comparison of lipids of sea urchin egg ghosts prepared before and after fertilization Mary Lee BarberJames F. Mead OriginalPaper Pages: 19 - 27
The effect of puromycin on the early cleavage cycles and morphogenesis of the pond snailLymnaea stagnalis Elida K. Boon-Niermeijer OriginalPaper Pages: 29 - 40
An experimental study of the life-cycle of the fresh-water spongeEphydatia fluvitilis in its natural surroundings G. Van de VyverPh. Willenz OriginalPaper Pages: 41 - 52
Interpersonale Differenzierung des Enzymaktivitäts-Musters bei dem polymorphen HydroidenHydractinia echinata Günther MayWerner A. Müller OriginalPaper Pages: 53 - 59
Recruitment of epidermal cells by the developing eye onOncopeltus (Hemiptera) S. M. GreenP. A. Lawrence OriginalPaper Pages: 61 - 65
Ultrastructural evidence for the absence of premelanosomes in eggs of the albino mutant (ap) ofXenopus laevis John G. BlueminkOlga A. Hoperskaya Short Communication Pages: 75 - 79