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 hind 

 body. 



Ab-er'kant. Departing from the 

 regular or normal type. 



Ab-o'eal. Opposite the oral or 

 mouth region. 



A-bkan'chi-ate (G-r. a, without; 

 bragchia, gills). Without bran- 

 chiae or gills. 



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

 longed point. 



Al-vb'o-lu8. a cavity fox'ming 

 the socket in the jaws of verte- 

 brates for the teelh. 



AM-BULA'CRtTM (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 ; 

 metabole, change). Referring 

 to insects and other animals 

 which do not undergo a meta- 

 morphosis. 



A-mob'phods (Gr. a, without; 

 morplie, form). Without a defi- 

 nite figure ; shapeless ; espe- 

 cially applicable to sponges. 



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

 koilos, hollow). Applied to 

 vertebrae which are doubly 

 concave, or hollow at both, 

 ends. 



A-nal'o-gy (Gr. analogia, 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 iuto each other like 

 veins. 



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

 gether of two bones so as to 

 prevent motion between them. 



An'nu-late. When a leg or an- 

 tenna is surrounded by narrow 

 rings of a different color. 



A'pLA-CEN-TAL. Referring to 

 those mammals in which the 

 embryos are destitute of a pla- 

 centa. 



A'po DOUB. Footless. 



Ap'tb-eous (Gr. a, without; jito- 

 on, wing). Destitute of wings. 



A-qui'fb- ECUS (Lat. aqna, water; 

 fero, I carry). Applied to the 

 water-carrying or water- vascu- 

 lar system of the sponges, etc. 



A-each'ni-da (Gr. araehne, a spi- 

 der). The class of Arthropods, 



