INDEX OF GENEEA, 



(Extinct Genera are marked with an asterisk.) 



Acanthella, 10. 



Acanthias, 90. 



Acanthobdella, 45. 

 *Acanthodes, 89. 



Acanthometra, 7. 



Acarus, 61. 



Achtheres, 48. 



Acicula, 82. 



Acineta, 8. 



Acipenser, 89. 



Acmcea, 81. 



Acridium, 67. 

 *.4c?oeJws, 90. 



Actinocrinus, 32. 

 Actinometra, 32. 

 Actinosphcerium, 8. 

 ^Edipoda, 67. 

 jEga, 56. 

 jEgina, 17. 

 jElurus, 113. 

 JEolis, 81. 

 sEolosoma, 46. 

 jEpyornis, 99. 

 jEquorea, 17. 

 sEshna, 68. 

 Agalma, 20. 

 Agama, 97. 

 Agapornis, 102. 

 *Agnostus, 54. 

 Agrion, 68. 

 Albertia, 42. 

 x, 100. 



o, 103. 

 s, 111. 

 Alcyonidium, 74. 

 Alcyonium, 22. 

 Alitta, 46. 

 Alligator, 98. 

 Alpheus, 58. 



*Alveolites, 22. 



Alveopora, 22. 



ylZytes, 94. 



Amaroucium, 7<). 



AmJblystoma, 92. 



Ameiva, 97. 



^-IJWMS, 88. 



Ainmodytes, 87. 



Ammonites, 84. 



^iTTMsfta, 4, 5. 



Ampelis, 102. 



Ampkicora, 46. 



Amphidetus, 28. 



Amphihelia, 22. 



Amphileptus, 8, 9. 



Amphinome, 46. 



Amphioxus, 86. 



Amphisbcena, 96. 



Amphitrite, 46. 



Amphiuma, 92. 



Ampullaria, 81. 

 *Ananckytes, 28. 



Anapta, 31. 



Anarrhicas, 87. 



^4nas, 100. 



Anatina, 79. 



^Iwceiw, 56. 



Ancistrodon, 96. 



^Iwrfrewa, 71. 



Androctonus, 62. 



Anguis, 97. 



^worfow, 78. 



^Iwomwj, 78. 

 *Anoplotherium, 110. 



.inser, 100. 



Antedon, 32, 33. 



Antennularia, 17. 

 *Anthocriniis, 32. 



Anthomyia, 69. 

 *Anthracosaurus, 94. 



