I N DEX 



PAGE. 



Abyssal Zone, Ill 



Acephala, 4 



Acetabula, 8 



Adductor Muscles, . . 62, 68 

 Adult Characters, ... 20 



Estivation, 86 



Afro-Arabic Region, . .191 



Agama, 116 



Agnatha, 257 



Air Chambers, . . . . 29, 36 

 Aleutian Province, . . . 167 



Ambergris, 80 



American Region, . . . 203 



Amphioxus, 1,3 



Anal Gland, 106 



Anandria, 256 



Anatomy, ...... 8 



Antarctic Region, . . .171 



Anus, 92, 101 



Aorta, ....... 88 



Aperture, . . . . . 45, 46 



Apex, ........ 45 



Aporobranchiata, .... 82 



Appareil de Resistance, . 62 



Aptychus, 37 



Aquiferous System, ... 90 

 Aralo-Caspian Province, . 162 

 Arctic Province, .... 157 



Arctic Shells, 155 



Argonauta, 31 



Arms, 8, 62 



Arrangement, 2 



Artery, 88 



Arthioglossata, .... 256 



Articulata, ...... 2 



Atlantic Region, .... 187 



Audition, 78 



Auricle, 88 



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Australian Region, . . .194 

 Australo-Zealandic Prov., 165 

 Austro-Malaysian Region, 194 

 Austro-Polynesian Region, 195 



Axis, 44 



Bathymetrical Distribution, 174 



Beaks, 8 



Beak, 55, 91, 92 



Beard, 11 



Binney, W. G., .... 261 

 Binomial Nomenclature, . 247 



Bivalve, 15 



Bivalve Shells, .... 53 

 Blind Sack, .... 93, 100 



Blood, 88, 90 



Body-Chamber, .... 37 

 Body-Whorl, ..... 45 

 Bojanus Organ, . . . .106 

 Boreal Province, . . . .,157 

 Boring Mollusks, . . . 53, 99 



Brachia, 8 



Brachionobranchia, ... 6 



Brachiopoda, 6 



Branchia, 83 



Branchial Uterus, . . .125 

 Brazilian Region, . . .199 



Breadth, 45, 56 



Breathing Organs, . . . 81 



Bryozoa, 6 



Buccal Membrane, ... 91 



Bulb, 91 



Bj^ssus, 110 



Californian Province, . .169 

 Californian Region, . . . 205 

 Canadian Region, . . . 205 

 Canal, ....... 45 



Cape Region, 190 



Cardinal Teeth, .... 59 



(292) 



