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.] 



Abomasum: 42. 



Adaptation : 67, 74. 



Albuminous : said of substances containing albumen. 



Alimen tary canal : 42. 



Alluring coloration : 111. 



Altric'ial: 79. 



Altruistic instinct: 129. 



Amce bold : having the changing form of an Amoeba. 



Anad romous : said of fishes that go from the sea up rivers to lay their 

 eggs. 



Anatomy: 39. 



Animalcule : an animal of microscopic smallness. 



Anten nae : 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. 



A'nus : 42. 



Appendix vermifor mis : 82. 



Artificial selection : 72. 



Assim'ilate : to receive food and transform it into a homogenous part 

 of the body substance. 



Atoll' : 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. 



Aut6m atism : the state of being automatic ; involuntary action. 



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