. An introduction to zoology : for the use of high schools . s (Sterna), and tlie Jicgers{) all belong to thisgroup. Nearly allied to it aretlvc marine petrels, to whichsnifill forms like the stormype-trel Qr Mother Careys cliick-cji {Procdla7-ia iKlaijka) be-long, ai^d the giant albatross,fjionmlea exulans, with awing-gpread of 15 feet. Thenostrils of the latter, however,are tubular, not mere fissuresas in the gidls, etc. ; tlicy are,therefore, often regarded as adistinct order (Turbinares). 19. The Steganopodes havereceived their name from thecomplete webbing of the toes,the fir
. An introduction to zoology : for the use of high schools . s (Sterna), and tlie Jicgers{) all belong to thisgroup. Nearly allied to it aretlvc marine petrels, to whichsnifill forms like the stormype-trel Qr Mother Careys cliick-cji {Procdla7-ia iKlaijka) be-long, ai^d the giant albatross,fjionmlea exulans, with awing-gpread of 15 feet. Thenostrils of the latter, however,are tubular, not mere fissuresas in the gidls, etc. ; tlicy are,therefore, often regarded as adistinct order (Turbinares). 19. The Steganopodes havereceived their name from thecomplete webbing of the toes,the first toe Ijeing turned for-ward and united by a mem-brane to the second. They are all fish-eating birds, but embraceBuoh different forms as tlie tropic and frigate birds {Phacfhori andTnchypfifr.^), the darters {PIoIuh), gannets (Sula), and, more familiar in-land, the connoranta {Phalacrocoraa), and pelicans (Pelecanm). Theeingular mandibular pouch of the last genus marks it from the others. 20. Unlike the above, the Ducks and their allies (Anseres) have the. r^^r Fig. 99.—Great Auk. Plautus impennis.(after Brehm.) HIGH SCHOOL ZOOLOGY. 139 hinder toe free ; the others are webbed, and the beak is covered with asoft skin in which there are numerous tactile corpuscles, while the gapeis provided with horny lamelhe (hence Lamellirostres), which serve forstraining the muddy water in which they seek their food. The leastduck-like forms are the Mergansers, which have a serrated bill and divefor fish. A very large number of species of wild ducks are known, fromone of which, the Mallard (Anas boschas), the domestic duck is the same genus belong the Teal and Widgeon, but the Shoveller(Sjwtula), Pin-tail (Dafla), Wootl-duck (Aix) and Iled-head and Canvas-back {Aythya) are sufficiently different to be separated under distinctgenera. The same is true of the Buffle-head [CharUoneta), Harlequin(HUtrionkm), the various species of Eiders (Somaleria) and Scoters,and the Ruddy Duck {ErU
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1889
