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alimentary canal, the kidneys, 
and the oviducts empty. 
Con’dyle (Gr. Londylos, knuckle), 
a bony projection. 
Eu sta’chian Tube, a passage 
from the throat to the ear. 
Fe’mur (Lat. femur, thigh), the 
thigh-bone. 
Fib’u la (Lat. fula, a clasp), the 
outer of the two bones of the leg 
below the knee. 
Hu’merus (Lat. humerus, the 
shoulder), the bone of the upper 
part of the arm. 
Keel, in birds, the ridge of bone 
along the ventral side of the ster- 
num. 
Met acar’pus (Gr. meta, beyond, 
and carpus), the group of bones 
between the wrist and fingers. 
Met atar’sus (Gr. meta, and far- 
sus), the group of bones between 
the tarsus and phalanges. 
O’viduct (Lat. ovum, egg, and 
duco, to lead), a tube for the 
passage of eggs. 
Phalanx, pl. phalanges (Gr. pha- 
tanx, battle-line or bone of finger 
or toe), one of the finger- or toe- 
bones. 
ANIMAL ACTIVITIES. 
Ra’dius (Lat. radius), one of the 
bones of the forearm. 
Ret’i na (Lat. rete, a net), the inner 
coat of the eye. 
Reptilia (Lat. repéilis, a rep- 
tile), a class of vertebrate ani- 
mals. 
Shaft, the midrib of a feather. 
Ster’num (Gr. stevnon, breast), the 
breast-bone. 
Tar’sus (Gr. ¢avsos, a flat surface), 
the ankle. 
Ten’don (Lat. ¢endo, to stretch), 
a cord or band of connective 
tissue usually binding muscles to 
bones. 
Tib’ia (Lat. ¢/déa), one of the bones 
of the leg below the knee. 
Ul'na (Lat. w/na, elbow), a bone of 
the forearm. 
U'ro style (Gr. oura, tail, and sty- 
Zos, a column), the long bone at 
the end of the vertebral column 
in the frog. 
Vane, the web of a feather with its 
shaft. 
Ven'tricle (Lat. ventriceulus, dim. 
of venler, the belly), a chamber 
of the heart for forcing blood 
into the arteries. 
