GLOSSARY. 



Ab-do'mbn. In mammals the part 

 of the trunk below or behind 

 the thorax ; in insects the third 

 region of the body, or bind 

 body. 



AB-]eR'KANT. Departing from the 

 regular or normal type. 



Ab-o'bal. Opposite the oral or 

 mouth region. 



A-BBANCHi-ATB (Gr. a, without; 

 hragchia, gills). Without bran- 

 cliisB or gills. 



A-cu'mi-natb. Ending in a pro- 

 longed point. 



Al-vb'o-lus. a cavity forming 

 the socket in the jaws of verte- 

 brates for the teeth. 



Am-bu-la'cbum (Lat. from ambu- 

 lare, to walk, a garden-walk). 

 The perforated space or area 

 in the shell of the sea-urchin or 

 the arm of a star-fish, through 

 which the foot-tubes or ambu- 

 lacral feet are protruded. 



A-mb-ta'bo-lic (Gr. a, without ; 

 metahole, change). Referring 

 to insects and other animals 

 which do not undergo a meta- 

 morphosis. 



A-MOB,'PHODS (Gr. a, without; 

 morphe, form). Without a defi- 

 nite figure ; shapeless ; espe- 

 cially applicable to sponges. 



Am-phi-ccb'lous (Gr. amphi; 

 koilos, hollow). Applied to 

 vertebrae which are doubly 

 concave, or hollow at both 

 ends. 



A-nal'o-gy (Gr. anahgia, propor- 

 tion). The relation between 

 organs which differ in struc- 

 ture, but have a similar func- 

 tion; as the wings of insects 

 and birds. 



A-nas-to-mo'sing. Inosculating 

 or running into each other like 

 veins. 



An-cht-lo'sis. The growing to- 

 gether of two bonesso as to 

 prevent motion between them. 



An'ntj-latb. When a leg or an- 

 tenna is surrounded by narrow 

 rings of a different color. 



A'PLA-CEN-TAii. Keferring to 

 those mammals in which the 

 embryos are destitute of a pla- 

 centa. 



A'poDOTJS. Footless. 



Ap'tb-kous (Gr. a, without; ^ter- 

 071, wing). Destitute of wings. 



A-QTJi'pB-KOUS(Lat. aqua, water; 

 fero, I carry). Applied to the 

 water-carrying or water- vascu- 

 lar system, of the sponges, etc. 



A-baoh'ni-da (Gr. arachne, a spi- 

 der). The class of Arthropods, 



