. A manual of zoology. Zoology. 542 CnORDATA it is probable that (lie Ralites have descended from carinatc forms by loss of power of tli,i;hl. The anatomical distinctions between the various families load one to belie\e that the\- ha\"e arisen from dilTerent groups of carinates and hence do not form a natural assemblage. Section I. STI^UTHIOXES, long humerus, legs and neck. Stritthion- , two-toed ostriches of .\frica, Slnilliio. , South .\merican three- toed ostriches, Rhea. Section II. C.\SU.\RIN.\; three toes, humerus short. Droiiu,:'ns. emus; Casiiariiis, cassowaries. Secti
. A manual of zoology. Zoology. 542 CnORDATA it is probable that (lie Ralites have descended from carinatc forms by loss of power of tli,i;hl. The anatomical distinctions between the various families load one to belie\e that the\- ha\"e arisen from dilTerent groups of carinates and hence do not form a natural assemblage. Section I. STI^UTHIOXES, long humerus, legs and neck. Stritthion- , two-toed ostriches of .\frica, Slnilliio. , South .\merican three- toed ostriches, Rhea. Section II. C.\SU.\RIN.\; three toes, humerus short. Droiiu,:'ns. emus; Casiiariiis, cassowaries. Section III. .M'Tl'^RVGI'^S, bill long, nostrils near tip, rudimentarv wing skeleton; four toes. A/y/cryx, New Zealand. The Dimoi^:, three toes, wing skeleton absent; giant birds of New Zealand; now extinct, apparently contemporaneous with man. . itis, a gigantic bird of ^ladagascar, possibly allied. Skeletons and eggs holding two gallons found in alluvium. Order IV. Carinatae. The name refers to the presence of the keel to the sternum, correlated with the powers of flight possessed bv most species. Other characters are the pres- ence of rectrices and remiges on tail and wings, and the fusion of clavicles to a furcula. Some strong fliers, like the raptores and albatrosses, have but a small. Fig. 5Q4.âFoot forms (from Schmarila). a, semi-palmate, wading of Ciconia: b, perching of Tmdus: c, rasorial of PJuisiaiius: J. raptorial of Faico: c, adherent of Cypseliis: /, cursorial of SInilhio: x. 7.\â '^o>h\c^v\ (scansorial) of Pirns: h. lohate of Podiccps: i, lofiale ami scalloped of J'lilicu: k. palmate of Anus: I, totipalinale of Pliaclhon. carina; in many poor fliers the carina may be entirely absent. The furcula is not always present, tlie clavicles not uniting (many parrots and toucans) or being absent (.\rcsi(cs). The remiges are also degenerate in some, as in the penguins (which arc llightless, although they have a strong carina), where they. Please note that th
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
