ARC. 22 
aro (arkig’6ni) ”. [Gk. archi, 
; gonos, offspring.] The first 
scum of life by spontaneous genera- 
tion (dz0/.). 
archinephric (arkinéf'rik) @ [Gk. 
archi, first ; Bratt kidney.] ApAl. 
t on the pronephric 
tubules Fie pi 
archinephros (Ar’ nee rés) 2. [Gk. 
archi, first ; nephros, kidney.] The 
Lionedat bite kidne y (emd.). 
wm (Ar kipal tim) m [Gk 
archi, fers L. pallium, a mantile.] 
he olfa actory region of the cerebral 
hemispheres (pAys. se 
see n. 
the attraction sphere, 
rays, and _ spindle-fibres 
arcicentrous pagar tras) “@ _ 11. 
bow entrum, centre.] 
Appl. vertebral pind in which 
the centra are mainly a from 
the arch tissue (emb., an 
arciferous (Arsif’ériis) a. 
bow ; ee to carry.] Appi. 
toral arch of toads, etc., where the 
emai ng and coracoid are widely 
ated and connected by a large 
arched epicoracoid (z0 ae 
Eee en (ar’sifd 
w a, shape shat d "Tike 
aera | re 
moss Ge eee tris) a, [L. 
centrum, centre.] Appi. 
ol.). 
bsén’ gio m. Ths 
arcus, bow; ¢ raion. ntre.| A 
ARM- 
the vertebral column of fishes 
zo0l.). 
arcuate — [L. arcus, bow.] 
rved o Spe like a bow, 
ardellae (Ardél’e) n. plu. ([Gk, ardetn, 
to sprinkle.] Small apothecia of 
certain lichens having the appear- 
ance of — ot). 
area saith )#. [L. area, ground-space.] 
urface, = area opaca, area 
seo tay » (em 
arenaceo se iatnd ‘shiis) a. [L. arena, 
sand. avis the properties or 
circle round a nipple ; 
the iris bordering 
tissue (zool.) ; the areas defined b 
cracks on the Sutace of oes Aa f 
areolar (4 
lat) a. 
[L. areola, space] "88 or ie an 
areola, having dis spaces or 
Eitesttices (602.) ; eels is appl. a 
with the 
fibres loosely attached (zoo/. 
— (Arjén’téal) a, 
silve A layer o 
Sontaniay calcic oo (zo0/.). 
argenteous ry) én’téiis) a. [L. 
teus, silve y i 
argenteum Cas etm) 2. [L. axgen- 
ro 
atophores in fishes (z0o/.), 
aril ‘Gr il), arillus ts ae 
illo m 
arillode 
many brachycerous Diptera (zoo/.). 
Aristotle’s lantern (Aristit'lz), tie 
oe apparatus of the s 
urchin rac ger as 
ture (4r'miatiir) m [L. arma, 
weapons. ease which serves 
to defend, as hai Ewch lon. thorns 
(402.) ; spines, sings etc. (zool.). 
