WIN- 349 XEN- 
wing coverts,—see tectri Wormian bones (wodr'midin), — see 
ing pad,—the <adepl ae wing of cpt — 
insect pupae (zoo/.). ; —the name applied to 
wing petal,— lateral petal in ie Wet that go to make up the 
papilionaceous plants (04). carpus (z00/.). 
r 
shell which preserves it as it lies 
quiescent nei ‘tag winter; cf. 
ummer eggs (200 
wisdom teeth,—the eae molar teeth 
ater complete the permanent set 
man, apa dian, much later than 
sea others (avaz.). 
wo sy toot: mall premolar tooth 
t the front’ of ‘the premolar series, 
occasionally present in Horses 
es — 
roast ian) a. [Wolf, em- 
eg ome t.] Appl. certain cerwicoares 
first discovered ai Wolff. 
Wol — mbryonic meso- 
nephros which avaes by the develop- 
ment of a —— of mesonephric 
tubules (ava 
Wolffian duet—the duct of the 
: this ve arise eit ther 
the xylem of the vascular bundles 
bot.). 
we ecell,—one of the special cells 
in the xylem of a vascular bundle 
(d02.). 
ood fibres, — sclerenchymatous 
fibres (d07.). ee 
h a paren- 
chymatous cells (40 
wood — —an ip of tracheal 
tissu tubular structure 
I 
rete va cell- Aiea (bot.). 
tubercle,—see Darwinian 
worker,—a e female in a 
colony of social acne (zool. 
vIn, worm 
the Flat s, Roundworm 
chaetes th  Oligechaetts (sool.). 
Xx 
xanthin (zin’thin) #. [Gk. xranthos, 
yellow.] Yellow colouring matter 
in flowers (do02. 
). 
xanthine (zin’thin, zin — n. k. 
sxanthos, yellow.]} ioxy-purine, 
ound in mucieie, liver, pancreas, 
and in urine ; also in certain plants 
se 
(Dp 
us (za es a. 
(Gk. xanthos, yellow ; karpos, fruit.] 
Having yellow fruits (407.). 
hodont (zin’thédént) a ([Gk. 
xanthos, yellow; odous, tooth.] 
Having yellow-coloured incisors ; 
appl. certain Rodents (zo0/.). 
xanthophane (zin'théfan) #. [Gk. 
anthos, —— : — to 
a ‘sot ophan 
xanth onl "Canton: n. 
saathon yellow ; 
autumn 
_sttuent 0 of chlorophyll (b0t.). 
zan’'thépiis) @. [Gk. 
gee aapelbons — ‘oot. } 
pee. a yellow oa Z.). 
thospermous (zan’thés —. a. 
“[Gk. a a ; oan d.] 
ing pacer 
ena’ thr) = 
parent eee 
—_ (zéndg’Ami) n. [Gk. xenos, 
ge; — marriage.] Cross- 
fertileation ( 
xenogenes: te (at ries oF [Gk. 
xenos, st ge O pro- 
duce. | Heterogenesis * Giol.). 
xenomorphosis n’émérfésis) m. 
[Gk. xenos, strange morphe, shape. | 
Heteromorphosi 
