GLOSSARY. 



693 



plied to a form of asexual gen- 

 eration where new individuals 

 arise as buds from the body of 

 the 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. 



GLAU'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. 



H^E'MAL (Gr. haima, 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-KA (Gr. Jiemi, half ; 

 pteron, wing). An order of in- 

 sec' s with the fore-wings part- 

 ly opaque, hence called heme- 

 lytra. 



HER MAPIIRO DITE (Gr. Ifermes, 

 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-KOG'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. Jiomologia, 

 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 

 os 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 QUI-LAT'E-RAL. Having the 

 two ends unequal, as in the 

 clam, quohog, and most La- 

 mellibranch shells. 



IN-E'QUI-VALVE. With one valve 



