. Elementary text-book of zoology. 452 CHORD ATA. quadrate has only a single articulation with the skull. The Ratita illustrate discontinuous distribution. The ostrich {Struthio) is found in Africa and South-VVestem Asia. It has only two toes—a large fourth and a small fifth. The American ostrich {Rhea) has three toes and is found in South America. The Cassowary {Casuarius) and Emu {Dromaiis) are found in the Australian region and the small Kiwi {Apieryx) in New Zealand. On this latter island are also found the remains of the recently extinct Moas {Din- ornis), huge wingless birds. Others have
. Elementary text-book of zoology. 452 CHORD ATA. quadrate has only a single articulation with the skull. The Ratita illustrate discontinuous distribution. The ostrich {Struthio) is found in Africa and South-VVestem Asia. It has only two toes—a large fourth and a small fifth. The American ostrich {Rhea) has three toes and is found in South America. The Cassowary {Casuarius) and Emu {Dromaiis) are found in the Australian region and the small Kiwi {Apieryx) in New Zealand. On this latter island are also found the remains of the recently extinct Moas {Din- ornis), huge wingless birds. Others have been found in Madagascar. Fig. 319.—The Kiwi [Apteryx) x \ " wingless " bird of New Zealand. The wings are vestigial and hidden below the feathers. Order II.—Carinata. The Carinata comprise the remainder of modern birds. Considering the enormous number of species and wide dis- tribution, they present remarkably few structural differences which are available for classification. In one or two fossils, such as the Cretaceous Hesperornis and Ichthyornis, teeth still survive. They are classified by reference to the arrangement of the feathers, the structure of the skull and of the alimentary Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Masterman, Arthur Thomas. Edinburgh, E. & S. Livingstone
Size: 1723px × 1449px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1900, bookyear1902
