MODERN SYSTEM. 
80 
men much narrower than the shell, on every side imbricated with 
membranaceous, foliaceous lamclte, which surround or embrace 
it: two of the lamellae are dorsal, the one being placed over the 
other; the other lamella* are placed on the sides of the belly, three 
on each side; apex of the abdomen terminated by two very long fila- 
ments, and with two shorter filaments below them : roslnim clongato- 
cylindric, inserted behind the anterior legs, furnished at its extremity 
with two straight corneous mandibles: kgs six ; anterior pair three- 
jointed, the 'second joint near the apex above unidentate, the last ter- 
minated by a claw; second pair triarticulated, the last joint ovate, 
compressed ; third pair Inarticulate, the second joint very thick, in- 
ternally dentated, armed at its extremity by a strong claw. 
Sp. 1. Anth. Smithii. Leach, Encycl. Brit. Supp. vol. 1. PI. 20. 
This species was discovered sticking to a shark which was thrown 
ashore on the coast of Exmouth, in Devon, by T. Smith, esq. 
Division II . — Body covercdty a bivalve shell: eyes sessile. 
Subdivision 1 .—Head porrected. 
Genus 5. DAPI1NIA, Mull., Lair., Bose, Leach. 
Eye one only: antenna two, branching. 
Sp. 1. Daph. Pul.e.v. Tail indexed: shell nuicronate behind. 
Monoculus Pulex. Linni, Fabr. 
Inhabits ponds and marshes. 
Subdivision 2 . — Head concealed. 
Genus G. CYPRIS, Mull., Lair., Bose, Leach. 
Antenna terminated by a brush. . 
The animals of this genus inhabit pools and ditches containing 
pure water; they swim with very great rapidity, and whilst in mo- 
tion conceal their whole body within their shell, which is truly bi- 
valve. 
Sp. 1. Cyp.conchacea. Shell ovate, tomentose. 
Monoculus conchaceus. Linn., Fabr. Cypris pubera, Mull. Cypris 
conchacea, Latr., Leach. 
Inhabits France, Germany, and England. 
Genus 7. CYTIIERE, Mali., Lair., Bose, Leach. 
Antenna simply pilose. . _ 
This genus was first discovered and established by Muller, who 
first observed all the species described in his Entomostracu. It is di- 
stinguished from Cypris by the antenna-, which are not terminated by 
a pencil of hairs. The legs are eight in number, and are rarely drawn 
within the shell, which is really bivalve. ~ 
The Cythcrcs have no tail, and their antennae, like those of the by- 
prides, have their articulations pilose. I h&y have but one eye. * • 
the species inhabit the sea, and may be found among the confirm 
