INDEX AND GLOSSARY. 



ABD 



A BDOMEN, the group of seg- 

 ** ments of the body which con- 

 tains the digestive organs.. 

 Aboral, at the extremity opposite to 



the mouth. 



Acamarchis, a moss-polype, 75 

 Acanthocephala, 66 

 Acarus, a mite, 109 

 Acephala, headless molluscs, 95 

 Acineta. 27 



Actinia, a sea anemone, 42 

 Adaptive characters, TO 

 Adductor muscles, 83 

 Agriotes, 131 

 AIcYcnaria. 46 

 Alcyonium, 46 



Alternation of generations, 40 

 Ambulacra, the tube-feet on which 



sea-urchins move, 49 

 Amoeba, 22 

 Amoebiform, composed of protoplasm 



like amoebae. 

 Amphipoda, 103 

 Analogy, similarity in function, 12 



Anelasma, a barnacle which lives on 

 living fishes, 106 



Anemone, sea, 42 



Animalcule, a minute animal, 



Anomura, 107 



Antennae, jointed feelers, as in in- 

 sects. 



Antennules, 99 



Anthrenus, 132 



Ant-lion, 127 



Ants, 127, 135 



Aphaniptera, fleas, 128 



Aphides, 123 



Arachnoidea, 98, 108 



CAL 



Arenicola, the lug bait, 71 

 Arthropoda, 14, 96 

 Ascnris, round worms, 65 

 Assimilation, the process whereby 



food is converted into blood. 

 Asteroidea, 57 

 Auricles, 94 



OACTERIUM, the walking-stick 

 *-* insect, also the most minute 



protoplasmic particles, 125 

 Palani, acorn shells, 106 

 Barnacles, 106 

 Fees, 134 

 Beetles, 131 

 Bilateral symmetry, equality and 



proportion of the two correspond- 

 ing sides of an animal. 

 Bivalves, 80 

 Blood, 2 



Borlasia, a large sea worm, 60 

 Brachiopoda, 80 

 Brachyura, 108 

 Branchiae, gills. 

 Branchiopoda, 104 

 Breathing, the process whereby 



oxygen is taken in to aerate the 



blood. 



Bryozoa, 74 

 Bugs, 123 

 Butterflies, 129 

 Byssus, a fibrous material whereby 



mussels and other molluscs anchor 



themselves, 84 



f ADDIS FLIES, 127 

 v -' Calcareous, consisting 



ig of lime. 



