| Their marsupium is well developed, opens to the rear, and contains only 2 teats. |
| The pouch, or marsupium, is variously structured. |
| Mammals belonging to quite different Orders show traces more or less marked of a marsupium. |
| Some marsupials have a pouchlike structure or fold, the marsupium, that shelters the suckling young. |
| In some species of marsupials, females develop a pouch or marsupium in which the young are nursed. |
| Members of this family have a well developed marsupium that opens anteriorly. |
