. Text-book of zoology for junior students. Zoology. 276 ;i;ate geniiino reptiles. The only liviii,;; Reptile wliieli lias miy power of sustaining itself in the air is the Flying Dragon (Drarv), which has been previously nien- In this ease, hoivever, the animal has no power of true flight, hut is simply enabled to take extensive leaps by means of a membranous expansion on eaeli side of the boily. In the Bats, again, the power of genuine flight is present; and this given by means of a leathery membrane which is supported chiefly by certain of the Angersâwhich are gre
. Text-book of zoology for junior students. Zoology. 276 ;i;ate geniiino reptiles. The only liviii,;; Reptile wliieli lias miy power of sustaining itself in the air is the Flying Dragon (Drarv), which has been previously nien- In this ease, hoivever, the animal has no power of true flight, hut is simply enabled to take extensive leaps by means of a membranous expansion on eaeli side of the boily. In the Bats, again, the power of genuine flight is present; and this given by means of a leathery membrane which is supported chiefly by certain of the Angersâwhich are greatly lengthenedâand is attached to the sides of the liody and hinil-liml)S. In the Pterodactyles the power of true flight was present; and this was also conditioned by means of a leathery expanded membrane, attached to the hinil- lindw, the sides of the body, and the foredimbs. In this case, however, the chief support of the flying membrane was derived from the ontermost finger of the fore-limb, which" was enormously elongated (fig. 200). That the Ptero-. Oolitr). Ill ;m arc ticrc rrroii â ////,. Fn nil the Litlingi'apliic vim- ,Mi:4ili:dlv ciilflta nleuhi li-its . t'eiuUpper if tlie hand dactylc tree to birds. hollow many nishcd , atlaiiir of win;. feet IVi id w ; ]iassc<l their cxislcncc chicriy in the air, and did not simply leap) from by two in which they agree with the flying 'line's, namely, were " }ineuniatic'*âthat is to say, were cd wiih air. Secondly, whilst the shoulder-girdle has â rs of tliat of liirds, the breast-bone (sternum) is fur- iit liduT Mr Icecl. serving Ibr the attachment of the great ic \vings. 'i'lieic c;iM lie no donlit, therefore, as to the eiijo^'ed the )iio\eT iii' genuine flight. Many of them lint some ol'llicm must lia\e been gigantic, tlie exjianse s lia\'ing been calculalcd a( iirobably alioiit twenty-seven tree .Ma I an if 111. wilh ^ whii lct\]L SlHUVIl .!â the 1 ere iilli cliar;n;li {iT'iimiiii
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1885
