PH1LL0P0DA. 
17 
ciliated ; and by their undergoing a regular moulting or 
change of shell as they grow, in some amounting to a 
species of transformation. 
Legion I — BRAN CHIOPOD A. * 
Branchiopoda {pars), Lamarck, Hist. An. s. Yert., 1818. 
— Latreille, Cuv. Hegne Anim., 1829. 
— M. Edwards, Hist. Nat. Crust., 1840. 
Monoctjltjs, Linnaeus ; Fabricius ; Latreille (minus Lynceus), Prec. des 
Car. gen. 
Character . — Mouth furnished with organs fitted for 
mastication ; branchiae many, attached to the feet ; body 
sometimes naked, but most frequently having an envelope 
in form of a buckler, in some inclosing only the head 
and thorax, in others the whole body ; feet vary in num- 
ber, all branchiferous ; antennae two or four, jointed, and 
generally ciliated ; eyes, sometimes two or even three, 
but frequently only one, or so closely approximated as to 
appear single. They are all free and unattached, swim- 
ming at large in the water. 
Order I— PHYLLOPODA.f 
Phyllopoda, Latreille, Hist. Nat. Crust., iv, 130, 1802 ; Gener. Crust, et 
Ins., i, 14. 
— Leach, Diet. Sc. Nat., xiv, art. Entomost. 
— M. Edwards, Hist. Nat. Crust., iii, 351. 
— Eesmarest, Consid. gen. Crust., 357. 
— J. E. Gray, Synops. Brit. Mus., 1842. 
— Burmeister, Organiz. of Trilobites, 34. 
— Lucas , Explor. Sc. de l’Algerie, Crust., 81. 
Phyllopa, Latreille, Cuv. Hegne Anim., iv, 171. 
Branchiopodes Lamellipedes and Branchiopodes Geans (in part), 
Lamarck , Hist. An. s. Yert., v. 
Character. — Body either naked or having only the 
head and thorax covered by the carapace ; feet numerous, 
* B payxta, branchise or gills ; and ttovq, a foot, 
f $v\\ov, a leaf ; and novg, a foot. 
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