HEA- 127 HEM- 
rs, etc, ; the anterior end of most ae a snail’s 3 pert. genus 
Paani animals containing x (zool.); pert. type of sym- 
the cerebral ganglia ; the antlers of 
deer vein );. the ad of a plant when 
it consists of a ves 
ceciact iiiengeenrn (d02.). 
head case,—the outer hard covering 
of an insect’s head (zool.). 
head cell,—one of the ‘lle found on 
the manubrium of the antheridium 
of Chara (do¢. 
ead kidney, —the e pronephric portion 
of the kidney, i in Pieri usually 
ie a nted only in the emb a 
hridium sie developed in 
e cephalic segment of inverte- 
brates (zo00, 
— bor ve AS Ss. sab tg A esarcate 
r organ a varying 
chambers lng ed 
mic contraction 
circulation of the blood gna po 
e core or central portion of a tree 
or fruit (402). 
heat (hét) 7 [A.S. Aae/u.] A kind 
of energy manifested in various 
ways ; sensation o rm 
produced by frome ene of special 
organs ; the period of sexual desire 
(phys. 
o 
a 
of the special areas 
alopod specialized to effect transfer- 
ence of sperms to eggs (zo, 
hedonic (hédén‘ik) 
glands found in certain reptiles 
which secrete musk ane - Jecaiecied 
active at the rutting se; , 
heel (hél) #. [A.S. hala.) “The hinder 
part of the foot; posterior 
i ; the talon 
th 
garni least ; therme, heat.] 
plant that thrives with the minimum 
of a t, as alpine plants (do7. 
helicine (hélisin) 
helicoid (hélikoid) @ 
spiral; ezdos, like.] Spiral; eed 
a vada branching in ‘which the sym- 
odium consists of ay fork branches 
of Pie same — 
helicoid cyme,—an ‘siemens pro- 
Acca b e suppression of the 
septate axes on the same side, 
thus causing the ope to be 
_ spirally twisted (doz. 
a (héli kétré “ma) #. [Gk. 
spiral ; trema, hole 
ca communicate with one 
another (ava 
~~ See [Gk. panes, 
n.] reduction of dis 
ie peg or markings 
leaves through the eoeiceneration 
f n them (of. 
heliotaxis ae n. Gk. 
helios, sun; f¢axis, arrangement.] 
aa to the stimulus of the 
sun’s 
Ressources pism (hé'liét’répizm) #.  [Gk. 
helios, sun ; Efe sac to turn.] The 
tendenc wi i 
the coiled spiral arrangement of 
certain structures in the inverte- 
head tes (zool.). 
helmet (hél’mét) #. [O.F. helmet, 
head covering.] The process of 
the bill of hornbills ; 
plates covering the head of certain 
— Fishes ; the galea of Insects 
o0l.). 
ichantiahohoay aay aan n. 
[Gk. he. worm ; /ogos, dis- 
u 
pevtiant anatomy, fe) rm 
ecially Feten), “fms (zool.). 
espe 
ae Pe (hérSti . [Gk. Helos, 
a ymbiosis in 
ich the one organism enslav 
the other and forces it to labour 
in its behalf, eg. in Lichens, in 
some species of ants ( — 
tron (hémél’ — [Gk. 
im half; ely The 
thickened forewin ie oe ertain 
Insects; the elytra of covaia 
Worms (zoo/.). 
