. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. TRACHEARLffi. 471. gi"UuluS '?, 111 1 ^ t. 1 - or rounded, and generally soft: in some males, it is narrowed behind into a cylindrical tail. The number of eyes is either two or four, and even six, according to Miiller. Eylaix, Latr., has the chelicene terminated by a moveable claw. A. extendens, Fabr. Ilydraclina, Latr., has the mouth composed of plates, fomiiner a projecting sucker, and the palpi have a moveable appendage beneath the extremity.
. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. TRACHEARLffi. 471. gi"UuluS '?, 111 1 ^ t. 1 - or rounded, and generally soft: in some males, it is narrowed behind into a cylindrical tail. The number of eyes is either two or four, and even six, according to Miiller. Eylaix, Latr., has the chelicene terminated by a moveable claw. A. extendens, Fabr. Ilydraclina, Latr., has the mouth composed of plates, fomiiner a projecting sucker, and the palpi have a moveable appendage beneath the extremity. A. geographicus, Fabr., A. globator, Fabr. Limnochares, Latr., has the mouth sucker-shaped, but the palpi are simple. A. aquations, Linn. [Other species of these water-mites have been described by M. Theis, in the Annates dcs Set. Nat. for 1832]. [From the very valuable discoveries lately made by M. Dujrcs, it appears that these water-mites undergo metamorphoses, accompanied by a complete Change of form, the lame having a very large head and six legs, whilst the pupa' are inactive, attaching themselves, by a single pair of legs, to the bodies of other aquatic insects, and consisting, as it were, simply of an oval bag with a narrow neck, the insect in this state having been formed, by M. , into the genus Achlysia, and specifically named A. Dytici, from taking up its residence beneath the elytra of the Water Beetle (Dyticus marginalis). They also attach themselves to the slender filaments com- posing the tails of the Water Scorpions {Nepa and Ranatra).] Other Mites {Micropthira, Latr.) differ from all the foregoing, in having six legs. They are all parasites. Caris, Latr., lias the sucker and palpi distinct; the body rounded, very flat, and covered with a scaly skin. C. vetpertilionit, Latr. On Bats. I'M. has figured an insect which he considers may be identical with Caris vespertilionis, in the Annates des Set. Nat., 1832 ; and which, notwithstanding its poss
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectzoology, bookyear1854
