. The chordates. Chordata. 544 Comparative Morphology of Chordates. Fig. 419. Bennett's cassowary, Casuarius bennetti. (Courtesy, Knowlton and Ridgway: "Birds of the World," New York, Henry Holt & Co., Inc.) Order 2. Struthioniformes : Ostriches (Struthio) of Africa and Arabia; largest living birds; wings much reduced, flightless; no carina on sternum; legs long and strong; only two toes (third and fourth); no aftershafts (Fig. 420). Order 3. Rheiformes: South American ostrich (Rhea); similar to African ostrich, but smaller and three-toed; wings less reduced; no aftershafts. Orde
. The chordates. Chordata. 544 Comparative Morphology of Chordates. Fig. 419. Bennett's cassowary, Casuarius bennetti. (Courtesy, Knowlton and Ridgway: "Birds of the World," New York, Henry Holt & Co., Inc.) Order 2. Struthioniformes : Ostriches (Struthio) of Africa and Arabia; largest living birds; wings much reduced, flightless; no carina on sternum; legs long and strong; only two toes (third and fourth); no aftershafts (Fig. 420). Order 3. Rheiformes: South American ostrich (Rhea); similar to African ostrich, but smaller and three-toed; wings less reduced; no aftershafts. Order 4. Apterygiformes: Kiwi (Apteryx) of New Zealand (Fig. 421); slightly larger than common fowl; short neck; long, sharp bill; thick coat of loose, fluffy plumage, no aftershafts; wings extremely vestigial and buried under plumage; no rectrices; no carina on sternum; legs short and stout; four toes; eyes small and poorly developed; olfactory organs highly developed; egg 5 inches or more in length; ground-inhabiting, sometimes burrowing; nocturnal. [carinatae (p. 542): Orders 5-20] Order 5. Tinamiformes (Crypturiformes): Tinamous (Tinamus) of Mexico and South America; resemble partridges; poor fliers, strong runners (Fig. 422). in. neognathae: Order 6. Sphenisciformes: Penguins (Fig. 423); flightless; short wings used as powerful swimming paddles; carina well developed; Southern Hemisphere 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 Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston
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