(Lat. aequus, equal; valvae, folding-doors). Applied to shells which are composed of two equal pieces or valves.
(Lat. erro, I wander). An order of Annelida, often called Nereidea, distinguished by their great locomotive powers.
(Gr. eurus, broad; pteron, wing). An extinct sub-order of Crustacea.
(Gr. exo, outside; pous, foot). The outer of the two secondary joints into which the typical limb of a Crustacean is divided.
(Gr. exo, outside; skeletos, dry). The external skeleton, which is constituted by a hardening of the integument, and is often called a " dermoskeleton."
(Lat. fasciculus, a bundle). Arranged in bundles.
(Lat. Fauni, the rural deities of the Romans). The general assemblage of the animals of any region or district.
(Lat. filum, a thread ; forma, shape). Thread-shaped.
(Lat. findo, I cleave). Multiplication by means of a process of self-division.
(Lat. findo ; and pario, I produce). Giving origin to fresh structures by a process of fission.
(Lat. findo, I cleave; rostrum, beak). A sub-order of the Perching Birds.
(Lat. for whip). The lash-like appendage possessed by many Infusoria, which are therefore said to be " flagellate."
(Lat. Mora, the goddess of flowers). The general assemblage of the plants of any region or district.
The limbs of Crustacea, which are modified to subserve mastication.
The unarticulated appendages of the Annelida, often called parapodia.
(Lat. foramen, an aperture; fero, I carry). An order of Protozoa, usually characterised by the possession of a shell perforated by numerous pseudopodial apertures.
(Lat. frux, fruit-; voro, I devour). Living upon fruit.
(Lat. dim. of furca, a fork). The "merry-thought" of birds, or the V-shaped bone formed by the united clavicles.
(Lat. fusus, a spindle; and forma, shape). Spindle-shaped, or pointed at both ends.
(Lat. gallina, a fowl). Sometimes applied to the whole order of the Rasorial Birds, but properly restricted to that section of the order of which the common Fowl is a typical example.