SEGREGATA, an order of the syiigencsioui. class of plants^ rirhero 
scYcrcl florets are inclosed in a common calyx, and each furnished 
with its proper calyx. 
SERRATE, cut or notched like a saw : plaic 4, fi;;. 31. 
SESQUIALTER AL, having a stiiall abortive floret accompanying the 
large one. In entomoly it means occupying a tliird part of the wing, 
or including a smaller band or .spot wifliin a larger one. 
SESQUITERTIAL, occupying the fourth part. 
SESSILE, connected immediately with the part from which it originates) 
without the intervention of .su])porL. 
SETACEOUS, bristle-shaped. 
SETARIOUS, applied to the antennaj of insects, it means, terminating 
in a simple, naked bristle. «. 
SHIELD, the saucer-liko fructfilication of lichens : The coloured spot 
on Ihc wings of .some birds of the duck kind : The sciitel of insects. 
SILICLE, a 2-valvcd seed-vessel, nearly as wide as long, with the 
seeds fixed to both .sutures, but wilhoiit partition. 
SILIQUE, a pod or 2-valved seed-vessel, with the seeds tixed to bolh su- 
tiises,, having a membranous partition running down its whole length. 
SINUATE, cut into deep sinuse.s ; plate 4, tig. 25. 
SPADIX, the receptacle of such llowers as are produced from aspathc, 
or sheath; plate. tig. 0, b. 
SPATE E, the calyx of a spadix, opening longitudinally like a sheath : 
plate 6, fig. (i, a. 
SPATUEATE, rounded and broad at the top and becoming narrower 
at the base, like a spatula or battledore : plate 6, tig. 39. 
SPEUIES, the division of a family or genus, containing such as agree 
with it in generic charaiSter. 
SPECULAR, exhibiting objects distinctly through it, as a piece of glass 
or talc. 
SPHACELATE, dead and as if burnt at the edges. 
SPIKE, that kind of inflorescence where the llowers arc sessile or 
ranged alternately along a coniinoii receptacle or stalk : plate 7, f. 1. 
SPIKEEET, a partial or lesser spike. 
SPllXESCiENT, becoming hard and thorn-like. 
SPIR.VCLES, the apertures in animals through which they breathe. 
SPIRE, (he w horls of siogle-valved shells. 
SPUMl'iSCENT, frothing up when burnt. 
SPUR, the sharp appendage on the heel of some birds : Birds, fig. 6v 
The horn-like iicftary of some flowers. 
SPURIOUS WINGS, small secondary wings at the end of the joint of 
the wings in birds, generally consisting of 3 or 5 short feathers : 
Birds, tig. 1, «. 
SQIJARROSE, consisting of scales spreading every way, or divided 
into pieces standing upright and not parallel w ith the plane. 
STAMEN, the male organ of fructification in plants: plated, fig. 10. 
STEl.LATE. radiating like the spokes of a wheel. 
STEiVlMATA, the 2 or 3 simple eyes placed on the crown of the head 
of some insects. 
