From Samos a large stork, Amphipelargus, and a typical Struthio; from the Sivalik Hills on the southern flanks of the Himalayas also an ostrich, and another Ratite with three toes, Hypselornis, as well as Leptoptilus, Pelecanus and Phalacrocorax.
Lastly must be noted the extinct tall Ratite species of Aepyornis with its several fancy genera.
Configuration of the palate, precoracoid, pelvis, intestinal convolutions, copulatory organ, &c. Loss of the keel is co-ordinated with the power of using the forelimbs for locomotion; although a " Ratite " character, it is not sufficient to turn a Notornis, Cnemiornis or Stringops, not even a Phororhacos into a member of the Ratitae.
Although loss of flight (correlated with more or less reduction of the wings and the sternal keel, and often compensated by stronger hind limbs) has occurred, and is still taking place in various groups of birds, it is quite impossible that a new Ratite can still come into existence, because the necessary primitive substratum, whence arose the true Ratitae, is no longer available.
195).5 The kiwis form a group of the subclass Ratitae to which the rank of an order may fitly be assigned, as they differ in many important particulars from any of the other existing forms of Ratite birds.
He also noticed the still stronger Ratite character, that the male takes on himself the duty of incubation.
In South America another large Ratite bird, the rhea, is called ostrich; it can be distinguished at once from the true ostrich by its possession of three toes.