GLOSSARY 
(Only those terms are defined in this glossary that are not explained in the text, 
In the case of the terms defined or explained in the text, reference is made to the 
number of the paragraph in which the explanation occurs. The pronunciation of the 
vernacular and scientific names of the animals mentioned in the text is given in the 
Classification.} 
Aboma'sum: 42. 
Adaptation ; 67, 74. 
Albuminous: said of substances containing albumen, 
Alimén'tary canal: 42. 
Alluring coloration: 111. 
Altric'ial : 79. 
Altruis'tic instinct: 129. 
Amoe'boid : having the changing form of an Amceba. 
Andd'romous: said of fishes that go from the sea up rivers to lay their 
eggs. 
Anatomy : 39. 
Animal'cule: an animal of microscopic smallness. 
Antén nz : the “ feelers,” the most anterior pair of appendages of in- 
sects and insect-like animals; situated on the head, and the seat of 
organs of special sense. 
An'thropoid : man-like. 
Anus: 42. 
Appén'dix vermifor'mis: 82. 
Artificial selection : 72. 
Assim’ilate: to receive food and transform it into a homogenous part 
of the body substance. 
Atdll’: a ring-shaped coral island nearly or quite inclosing a lagoon. 
Atrophy : a stoppage of the growth or development of a part or organ, 
Auditory : referring to the sense of hearing. ‘ 
Autdm’atism : the state of being automatic; involuntary action. 
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