GLOSSARY. 
321 
plied to a form of asexual gen- 
eration where new individuals 
arise as buds from tlie body of 
tiie parent. 
Gla'brous. Smooth; opposed 
to hairy; downy, villous. 
Gland. A cellular sac which 
secretes, i.e. separates, cerlain 
constituents of the blood. The 
liver is a gland secreting bile ; 
the kidneys excrete urine. 
Glau cous. Bluish gi cen or gray. 
GoN-OP'o-DA (Gr. gone, genera- 
tion; poufi, j)odos, foot). Tlif 
modified first pair of abdomi 
nal appendages of the male lob- 
ster, shrimps, and cnil)s. 
H^'mal (Gr. liaima, blood). 
Connected with the blood-ves- 
sels or heart. 
Hal lux. The thumb or gi-eattoe. 
Hal'ter-es (Gr. haUeres. poisers). 
Balancers : the rudimentary 
hind wings of Diptera. 
Haus'tel-late. Furnished with 
a proboscis so as to lake food 
by suction. 
He-mip'te ra (Gr. Jiemi, half ; 
pteroii, wing). An order of in- 
sects with the fore-wings part- 
ly opaque, hence called heme- 
lytra. 
Her mapu'ro DUE (Gr. Hermes, 
Mercury ; Aphrodite, Venus). 
Any animal having the organs 
of both sexes, usually the 
ovary and testes, combined in 
the same individual. 
He-te-ro-cer'cal. Unevenly 
lobed, as in the tail of sharks 
and Ganoids, when the back- 
bone is prolonged into the up- 
per lobe. 
Het-e rog'a-my. — Parthenogen- 
esis. 
Hex-a'po-dous. Provided with 
six feet. 
Ho MO cer'cal. Even-lobed, as 
in the tails of bony fishes. 
Ho-mol'o-gy (Gr. homologia, 
agreement). Implies identity 
in structure between organs 
which may have different uses ; 
as the fin of a whale, and the 
foot of a dog, or a bird's wing. 
Homology implies blood-rela- 
tionship, i.e., a comnumity of 
origin between parts which 
may have distinct uses. 
Hy'da tid. The bladder-worm, 
or the cystic stage of a tape- 
worm. 
Hy-men-op'te RA (Gr. humeri, 
hymen, or membrane; pteron, 
wing). An order of insects 
with two pairs of membranous 
wings. 
Hy'otd (Gr. T, eidos, resem- 
blance). A bone in mammals, 
resembling the Greek letter U, 
its form being different in 
other vertebrates : also called 
OS lingucB, from its supporting 
the tongue. 
Hy'po-blast. The under or in- 
ner layer of the embryo. = 
ectoblast, and the endoderm of 
the adult. 
Im a'go. The final or fourth, 
winged and adult state of in- 
sects. 
In-e qui-lat'e-ral. Having the 
two ends unequal, as in the 
clam, quohog, and most La- 
mellibranch shells. 
In-e'qui-valye. With one valve 
