Ov^/ 



O/'x 



-C^/'^ 



duw 



x>^/ 



or-' 









INDEX 



Acanthocephala, 173 



acanthocephalids, -l^z 



actinotrocha, 151 



African swallowtail, 138 



agriculture of ants, 9 



alcyonarians, X39, 165 



Algonkian, 99 



alligators, 7, 11, 107 



American eel, 131, 149, 163 



ammonites, no, 112. 



Amaba, 15^ 



amphibians, 6, 45, 50, 51, 78, 80, 88, 



89, 103, 149, i6i, i2.i, 2.11, 113, 161 

 AmphioxuSy 161 



ancestry of and diversity in dogs, 184 

 ancestry of man, 118, 130 

 angle-wings, 134, 141 

 animal-flowers, 165 

 animals of the Cambrian, loi 

 animals of the past, xii 

 animals, symmetries of, 171 

 animal world a closely unified entity, 



160 

 Annelida, 161, 169 

 annelids, 69, 100, loi, 110, m, 150, 



155, 190, 105, io6, 147, 155, 156, 158 

 ant agriculture, 9 

 ant-eating butterflies, 46 

 anthropoid or man-like apes, 1, 6, 17, 



2.8,19,114, 115,117 

 antipatharians, 139, 165 

 anfiquus, Fusus, 144 

 ant-lions, 10 

 ants, 7, 8, 9, II, 15, 16, 18, 11, 35, 48, 



138,159,133 



ape-man, Java, 116 



apes, 15,18, 19, 117, 130 



aphid-feeding butterfly, 8 



aphids, 8, 9, 10 



appendicularians, 71 



Apferjx, 145 



arachnids, 111 



Archaopteryx, 89, 91, 111 



archiannelid worms, 103 



Arctic tern, 81 



Aristolochia swallowtails, 31, 140 



arrow-worms, 65, 76, loi, 149, 161, 



190, 157, 163 

 Arthropoda, 65, 108, 117, 161, 169 

 arthropods, 78, 79, 118, 119, 110, iii, 



111, 168, 179, 189, 190, 101, 106, 111, 



156, 157, 163, 174 

 ascidians, 71 

 asexual reproduction, 155, 156, 157, 



atalanta, Cynthia, 86 

 Aurellia, development of, 151 

 auricularia, 150 



B 



Baboons, 17 



baby stage of man, 15 



backboned animals, 45, 167, 181, 189, 



111, X13, 16 1 

 bacteria, 35, 40, 41, 51 

 balance of animal life, changes in, z 

 balance of life, 114, 113 

 Balanoglossida, 161, 168, 175 

 balanoglossids, 70, 103, 150, 196, 199, 



100, 157 

 Baltimore oriole, 13 

 barnacles, 66, 119, 151, 153, 161, 163 



U85] 



