. The structure and classification of birds . l/i ficutaQ .... 46 4 4,4-5 Pcecilonetta bahamensis £ . 210 2-5 4,4-25 „ bahamensis $ . 34 3 3,3-3 Qucrqitedula circia ? 4 — 3 Hymenolamus malacorhynclms % 4 4 3-8, 4-25 Spatula clypcata $ 8 96 6 43-5 5 3-5, 3-75 Fuligula ferina 3 4 2 4 4-5 i 4 5 4 6-75 „ rufinaS r± cj 4 2 3-5 6-5, 7-5 Nyroca leucophthalma $ . 48 1-5 1 i inly one The muscular anatouy of the Anseres is very uniform,which coincides with their uniformity of life habit. Evenpresumed aberrant types, such as Mergns, Biziura, and 460 STRUCTURE AND CLASSIFICATION OF BIRDS Tachyeres, are ha
. The structure and classification of birds . l/i ficutaQ .... 46 4 4,4-5 Pcecilonetta bahamensis £ . 210 2-5 4,4-25 „ bahamensis $ . 34 3 3,3-3 Qucrqitedula circia ? 4 — 3 Hymenolamus malacorhynclms % 4 4 3-8, 4-25 Spatula clypcata $ 8 96 6 43-5 5 3-5, 3-75 Fuligula ferina 3 4 2 4 4-5 i 4 5 4 6-75 „ rufinaS r± cj 4 2 3-5 6-5, 7-5 Nyroca leucophthalma $ . 48 1-5 1 i inly one The muscular anatouy of the Anseres is very uniform,which coincides with their uniformity of life habit. Evenpresumed aberrant types, such as Mergns, Biziura, and 460 STRUCTURE AND CLASSIFICATION OF BIRDS Tachyeres, are hardly if at all to be distinguished anatomicallyfrom the typical geese and ducks. Our knowledge of themuscular structure of this group of birds is mainly due toFUEBEINGEE, who has illustrated the fore half of the bodyby two double plates referring to Anser cinereus. An interesting duck character (also, however, found inColymbus, Tinami, and some Galli) is the meeting of the twogreat pectoral muscles over the carina sterni. In Mcrgus. FIG. 217—BICEPS FEMOKIS OF DUCK (Hi), TO SHOW ITSRELATIONS TO GASTROCNEMIUS (AFTEH WELDOX). mergaiixcr, for example, they blend for a space of halfan inch. There is a biceps slip present,1 and this has at leastsometimes a peculiar arrangement, which is remarkably likethat of the Colymbi. In Anser cinereus FURBRINGERfigures the biceps slip as attached in the ordinary way tothe tendon of the tensor patagii longus ; but before it is thusattached it gives off a slender tendon, which—exactly as inthe Colymbi—runs over the patagium and is inserted on tothe fore arm in front of the broad and diffuse tensor patagiibrevis tendon. In Anas FURBRINGER figures this tendon as joining the 1 Not in Cygnus Bciciclii. ANSEEES 461 patagial fan, a state of affairs which is exactly paralleled injgZchmophorus (see p. 387). In ducks there is a peculiarity inthe biceps to which attention appears to have been firstcalled by FURBRING-EE. There is a tendinous sh
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
