318 
GLOSS ABY. 
embracing the spiders, scor- 
pious, and mites. 
A're-o-late. Furnished with 
small areas; like a network. 
A-RiSTATE. Furnished with a 
hair. 
Ar-thro'po-da (Gr. ariliros, a 
joint; 'pous, podos, foot). Those 
Articulata with jointed feet, 
such as crabs and insects. 
Ar-ti-cu-la'ta (Lai. articulus, di- 
minutive of artus, a joint). 
Cuvier's subkingdom of worms, 
Crustacea, and insects. 
Ar-ti-o-dac'ty-la (Gr. artios, 
even; daktulos, finger or toe). 
Those Ungulates with an even 
number of toes, as the ox. 
A-SEx'u-AL. Applied to animals, 
especially insects, in which the 
ovaries or reproductive organs 
are imperfectly developed ; and 
which produce eggs or young 
by budding. 
Au-re'li-a. Old term for the 
pupa of an insect. 
Au'ri-cle (Lat. auricula^ a little 
ear). One of the cavities of 
the heart of mollusks and verte- 
brates. 
Az'y-gos {a, without ; zugon, a 
yoke, a pair). An organ, such 
as a nerve or artery, situated 
in the middle line of a bilater- 
ally symmetrical animal, which 
has therefore no fellow. 
B^-No'po DA (Gr. haino, to walk). 
The thoracic legs of insects. 
B^'no-some (Gr. baino, to walk; 
soma, body). The thorax of in- 
sects. 
Bi fid. Divided into two parts; 
forked. 
Blas'to-derm (blastos, a bud or 
sprout; ^?6rm(^, skin). The first- 
formed layer of the germ-cells 
of the embryo. 
Blasto pore. The mouth of 
the gastrula. 
Blas'to sphere. The embryo 
when consistingof a single cell- 
layer. Thesameastheblastula. 
Blas'tu-la. The embryo with 
but a single layer of cells. 
Bran'chi- A. A gill or respiratory 
organ of aquatic animals. 
Buc'cAL. Relating to the mouth 
cavity; or rarely to the cheeks. 
Bul'late. Blistered. 
Ca-du-ci bran'chi ATE (Lat. ca- 
ducus, falling off; Gr.bragcMa, 
gills). Applied to those Ba- 
tracliia in which the gills be- 
come absorbed before adult life. 
Cal'ca-ra-ted. Armed with 
spurs. 
Ca'lyx. a little cup; often ap- 
lied to the body of a Crinoid. 
Cap'i TATE. Ending in a head or 
knob. 
Cen-trxjm. The body or central 
part of a vertebra. 
Ce-phal'ic. Relating to the 
cephalum or head. 
Ce-pual'o-mere a cephalic seg- 
ment of an Arthropod. 
Ce phal'o-some. The head of in- 
sects, Arachnida and Myrio- 
poda. 
Cer-co'po-da (Gr. cercos, tail; 
pous, podos, foot). The last pair 
of jointed abdominal appen- 
dages of insects; the *'cerci." 
Che'la. The terminal portion of 
a limb with a movable lateral 
part, like the claw of a crab; as 
