Chick Embryo, 96 hour Microscope Slides. (item# 311676) are cleared and stained. Serial sections (item# 311688) show the beginning of most of the. 4 Day (96 hour) Chick Embryo. Extending out from the embryo is a thin delicate membrane with blood vessels at its surface. This membrane, called the allantois, expands as the embryo develops until it completely lines the shell. Franson coordtrans v23 serial number.