TY - JOUR T1 - Primitive Knot and Early Gastrulation Cavity Co-Existing with Independent Primitive Streak in Ornithorhynchus JF - Proceedings of the Royal Society of London (1854-1905) VL - 71 SP - 314 EP - 322 PY - 1902/01/01/ UR - http://dx.doi.org/10.1098/rspl.1902.0100 M3 - doi:10.1098/rspl.1902.0100 AU - Wilson, J. AU - Hill, J. ER -