MAMMALIA, the first class of animals, including such as suckle their 
young by means of lafitiferous teats. 
MANDIBLES, the 2 pieces composing the bill of birds : Birds, {.% ci.b. 
AI EUGIFOJIM, clustered like a sheaf of corn. 
MOLLUSCA, the second order of worms, comprising those simple 
naked animals which are furnished with limbs. 
MONADELPHIA, the sixteenth class of plants, comprising those her- 
maphrodite vegetables with one set of united stamina: plate 1, f. 16. 
MONANDRJA, (he first class of plants, containing those hermaphrodite 
ones which have only one stamen : plate 1, fig. 1. 
MONILIFORM, beaded like a necklace : plate 3, fig. 9 ; g. 
MOiVtECIA, the twenty-first class of plants, including such as have 
both stamen and pistil on the same plant, but- in distinct flowers : 
plate 1. fig. 21. 
FfONOGYNlA, having one style only : plate \, fig.l. 
MONAST venous, bearing a single spike. 
AlUCllONATE, ending in a sharp rigid point. 
aiUTE, in mineralogy applied to metals which do not ring when struck 
with other hard substances. 
MURICATE, clothed with sharp rigid points. 
MUSCl, mosses, the second order of the class cryptogamia, contain- 
ing those leafy vegetables having a capsule furnished with a deci- 
duous veil and a lid : plate 1, fig. 24 ; B. 
NATATORY, legs or appendages formed for swimming. 
NECESSARIA, an order of vegetables of the class syngenesia, where 
the florets of the disk are barren for want of a s'tigma, but tlic 
female florets of the ray produce perfedt seeds. 
NECTARY, (hat part of the flower which usually contains a sweet 
honey. like fluid: plate 6, fig. 23; w. 
NEUROFIERA, the fourth order of insedts, comprehending such as 
have 4 membranous finely reticulate wings, and have no sting : 
InseCis, fig. 1 8. 
NICTITANT MEMBRANE, a thin mcmbi'anc which covers the eyes 
of birds and fishes sheltering them from too much light and external 
injuries, and through which they can see pretty distinctly. 
v 
OB, in composition is used for obverscly or inverted ; asVbconic, in- 
versely conic ; obcordate, inversely heart-shaped, S^e. 
OBVOLUTE, applied to (hefoliation of leaves: when the margins alter- 
nately embiace the straight margin of the opposite leaf: pi. 8, f, 20. 
OCELLATE, applied to eye-like spots which are surrounded with a 
ring of a dilierent colour called the iris, and often inclosing one or 
more lesser spots called the pupil: InseSs, fig. 17.. 
OCTANDRIA, the eighth class of vegetables, including those herma- 
phrodite ])jants vVhich have 8 stamina : plalc 1, fig, 8. 
ORBITS, the region round the eyes: Birds, fig 3; c. 
ORDER, the subdivision of a class, or second branch of systematical 
arrangement, 
OVATE, shaped like the longitudinal section of an egg. 
