A254 Marsupials
   Marsupials are an infraclass of mammals, characterized by a distinctive pouch (called the marsupium), in which females carry their young through infancy. Females have two vaginas which lead to separate uteruses, but both open externally through the same orifice. A third canal, the median vagina, is used for birth. Marsupials do not have a placenta, so babies not much larger than an embryo crawl from their mother’s meidan vagina to her pouch where they feed from her nipples.