Duck-bills.

Ornithorhynchus.

O. anatiuus.

Australia generally, is the habitat of this curious creature, which, though plentiful, is still very little known as regards its economy, propagation, &c. Dr. Bennett discovered the young of a Platypus 30 years ago, but very few, if any, specimens have since been obtained, and no further progress has been made towards the solution of the still pending and highly interesting physiological question—Does the Platypus lay eggs?