. A manual of zoology. Zoology. 3S6 ARTlIROrODA In the terrestrial species the gills are adapted for breathin,!:; damp air. In rLVa-llio and ArmadiUiditni the ti'rst or first and second opercula are ].ermeated with a system of air tulies, which physiologically, though not morphologically, are comparable to the trachea; of insects. In the Isopoda the tendency to parasitism is greater than in the Aniphipoda. Many swimming forms attach themselves to fishes and feed by boring with their' modified mouth ]iarts into the skin. The Bopyrid;i; live in the branchial chamber of shrimps. Crvptoiiisciis is
. A manual of zoology. Zoology. 3S6 ARTlIROrODA In the terrestrial species the gills are adapted for breathin,!:; damp air. In rLVa-llio and ArmadiUiditni the ti'rst or first and second opercula are ].ermeated with a system of air tulies, which physiologically, though not morphologically, are comparable to the trachea; of insects. In the Isopoda the tendency to parasitism is greater than in the Aniphipoda. Many swimming forms attach themselves to fishes and feed by boring with their' modified mouth ]iarts into the skin. The Bopyrid;i; live in the branchial chamber of shrimps. Crvptoiiisciis is a shapeless sac which attaches itself to the stalk oiSaa-uIina (\x 374), and, after causing the death of this parasite, uses its network of 'roots' t'or its own nourishment. The Entoniscidx (fig. 413) attack Decapoda and, pressing the skin before them, penetrate the inte- rior. Their strange shape is 'largely due to the lobe-like brood lamellT. Thev are usually hermaphroditic, but have besides compleniental dwarf males (fig.'4i3>-I)-. Fig. 414.—.1, Idotca Irrorata*; B, Limnoria Ili^iioniiii*; C, JEgt P,Lcl>loiln-I<i tilgicolii* (^aftcr Ilargcr). psora* ('salve bug'); Sub Order I. Si.\ free thoracic segments; heart thoracic; first thoracic foot (on head) chelate; abdomen with swimming feet; intermediate between Amphipoda and other Isopoda. Tuiiais,'^ Li'plcHhcla'^ (fig. 414). Sub Order II. Seven free thoracic segments. On'; terres- trial, 'sow bugs'; Porccllio,'''' ihiisciis,''^ Armadilliditm* 'pill bug.' (fig. 412), fresh water. Si', head broail, body rounded and ; Sphccroma* Liiimoria lii^iioriiin'^' (fig. 414), gribble, destructive to submerged wood. , free-living, marine, with usually elongate bodies; Idotca* Cacidotca* , parasitic on Caridea; boily of female disc-like, asym- metrical, without eyes; Bopvrus* OvmothoiD-E, ]iarasilic on fishes or in their mouths. Cyinolhoa* .E,t;a* Cirol
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
