. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. Tl') (':.-(;â.V».' ,h.,:oll.,. SJiDOni GALI'.NK.â(;.''.-»â â â llOUll :li('i lie kc'jit ill a moisi stiite. 1< ivcii ill the land eraiis, whieli jjass nearly the wliolc of rtinio u]ion tlie (hy ground, the gills iiood moisture, and are constantly niaint their wet condition by an internal ehamher wliicli is tilled witl tiire to the liranehia^ This structure is analogous to that of the â cliiiiliiiig perch and
. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. Tl') (':.-(;â.V».' ,h.,:oll.,. SJiDOni GALI'.NK.â(;.''.-»â â â llOUll :li('i lie kc'jit ill a moisi stiite. 1< ivcii ill the land eraiis, whieli jjass nearly the wliolc of rtinio u]ion tlie (hy ground, the gills iiood moisture, and are constantly niaint their wet condition by an internal ehamher wliicli is tilled witl tiire to the liranehia^ This structure is analogous to that of the â cliiiiliiiig perch and otlior land-visiting lish, which have already been described pail of this volume. In order to retail aincd in I water ami su])])lies mois- liiig organs in the in an earlier 1 a full supply of water, the land oralis are forced visit a stream or pond daily, but a single dip is sullicient for the twenty-four hours. It very iviiiarkidile that these ])articiiliir crustaceans cannot endure total inimersion in rater, and that if they are submerged for III 111" niy considi'i'able time they will be drowned, ;li more slowly, yet as certainly, as a hiiinan being under similar circumstances, the ills being madefor aerial respiration, lii other land crabs, there are masses of membra- lous folds, and in some is found a spniigy mass in wiiich the needful water is stored lie (li'\ ing of the branchial meinbraiu s produces a dmilile etfect, and is in two modes huitliil to the respiratory functions. In the first place, all such memliranes fail to ilisrliarge their functions when they become dry, a familiar example being fmmd in the (li'licati ' â â â â â¢â¢â¢ .. ,. ... memlirane that lines the li| nd, ill the second ])lace, as soon as the folds of o]ieiiiiig a crab or a lobst I IS er, ill which animals Iheliiiinchiu' begin to dry, they collapse, and so diminish the extent of surface whicl ]ii' to the air. The gills may be easily examined on diry are popularly ca
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectmollusks
