GLOSSARY. 



693 



plied to a form of asexual gen- 

 eration where new individuals 

 arise as buds from the body of 

 tlie parent. 



GLA'BROUS. Smooth; opposed 

 to hairy; downy, villous. 



GLAND. A cellular sac which 

 secretes, i.e. separates, certain 

 constituents of the blood. The 

 liver is a gland secreting bile ; 

 the kidneys excrete urine. 



GLATJ'COUS. Bluish green or gray. 



GON-OP'O-DA (Gr. gone, genera- 

 tion; pous, podos, foot). The 

 modified first pair of abdomi- 

 nal appendages of the male lob- 

 ster, shrimps, and crabs. 



(Gr. kaima, blood). 



Connected with the blood-ves- 



sels or heart. 



HAL/LUX. The thumb or great toe. 

 HAL'TER-ES (Gr. halteres, poisers). 



Balancers : the rudimentary 



hind wings of Diptera. 

 HAUS'TEL-LATE. Furnished with 



a proboscis so as to take food 



by suction. 

 HE-MIP'TE-RA (Gr. liemi, half ; 



pteron, wing). An order of in- 



sects with the fore-wings part- 



ly opaque, hence called heme- 



lytra. 

 HER MAPURO DITE (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 community 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. humen, 

 hymen, or membrane; pteron, 

 wing). An order of insects 

 with two pairs of membranous 

 wings. 



HY'OID (Gr. T, eidos, resem- 

 blance). A bone in man named 

 from resembling the letter U ; 

 its form being different in 

 other vertebrates : also called 

 ox lingua, from its supporting 

 the tongue. 



HY'PO BLAST. The under or in- 

 ner layer of the embryo. = 

 ectoblast, and the eudoderm of 

 the adult. 



IM'A GO. The final or fourth, 

 winged and adult state of in- 

 sects. 



IN-E QTJI-LAT'E-RAL. Having the 

 two ends unequal, as in the 

 clam, quohog, and most La- 

 mellibrauch shells. 



IN-E'QUI-VALVE. With one valve 



