374 GLOSSARY, 



Anchylosis. The union of the two surfaces of a joint by bone, so 

 that all movement is lost. 



Annulosa. (Lat. annulus, a ring.) Ringed animals. 



Anthropoid. The highest order of apes. 



Anthozoa. (Gr. &v6os, a flower ; faov, an animal.) A class of Coelen- 

 terata generally termed Actinozoa. 



Anura. (Gr. a, without ; ovpa, a tail.) An order of Amphibia, includ- 

 ing frogs and toads. 



Apoda. (Gr. a, without ; irovs, foot.) Fishes that have no ventral 

 fins. 



Apodous. Footless. 



Aptera. (Gr. a, without ; irrtp6v, wing.) The wingless insects, 



Arachnida. The spiders. 



Archaeopteryx. A fossil bird which possessed a tail of true verte- 

 brse. 



Arthropoda. (Gr. o, without ; &p6pos, a joint ; TTOVS, Tro56s, foot.) 

 Articulata with jointed feet, as crabs, insects, etc. 



Artiodactyla. (Gr. &PTIOS, even ; $O.KTV\OS, finger or toe.) Even-toed 

 Ungulates. 



Asexual. A term applied to animals, as Aphis, in which the repro- 

 ductive organs are imperfect, and the young are produced by 

 budding. 



Auricle. (Dim. of auris, an ear.) The cavity of the heart which re- 

 ceives the blood and transmits it to the ventricle. 



Avicularium. (Avictila, dim. of avis, a bird.) Peculiar little pro- 

 cesses found in many of the Polyzoa, shaped like a bird's beak. 



Bacterium. (Gr. jScwcTTjpiov, a staff.) Minute filamentous organisms 

 found in decomposing infusions of organic matter. 



Balanidae. The acorn-shells, a family of Cirripedia, or barnacles. 



Batrachia. Applied to frogs, toads, and salamanders. 



Belemnite. A fossil genus of Cephalopoda. 



Bivalve. (Lat. bis, twice ; valvce, folding-doors.) Shells with two 

 valves. 



Branchiae. (Gr. &pdyx ia > gills-) Breathing-organs of fishes, etc. 



Byssus. (Gr. (3v<raros, flax.) Silk anchor-threads of the mussel, etc 



Cavicornia. (Lat. cavus, hollow ; cornn, horn.) Ruminants with 

 hollow horns. 



Cephalopoda. (Gr. /ce^oA^j, the head ; TTOVS, foot ) The highest class 

 of Mollusca. 



Cestraphori. A family of Elasmobranchii, or sharks. 



Cetacea. The whales. 



Chiroptera. The bats. 



