INDEX 



To names of Classes, Orders, Sub-Orders, and Genera ; to technical terms ; and to 

 names of Authors discussed in the text. 



Acanthascinae, diagnosis 



and genera, 122 

 Aaudliuscvs, 122 

 Acanlhuiiinellit, 123 

 Acanthel/a, 153 

 Acanthin, 43 

 Acanthodictj/a, 123 

 Acanlhrnndriilde, 43 

 A cant h arrh ajih /«, 153 

 Acantliomcrna, 122 

 AcarnuH, 13H, 152 

 acerate spicules, 101 

 Acerrocludiiiu, 151 

 Achelidenna, 152 

 Aciculina, 78, 146 



— diagnosis and classifica- 

 tion, 150 



Aciculi/e.s, 149 



acrepid, 135 



actinoblast, 40. 107 



aesthacytes, 47 



Age las, 152 



alate spicules, 102 



Alectona, 151 



Algol, 148 



Ammoconia, 154 



A mmoaniiUac, diagnosis 



and genera, 154 

 Amvwlynthvs, 154 

 Aiiimoaoletiia, 154 

 amoelfocytes. 28, 58, 02, 



72, 85, 120 

 amoeljoid movement in 



collencytes, 52 

 ,1 iiiorjj/dnojjsln, 153 

 aiiiphiaster, 134 

 Aviphiuxtrdla, 152 

 ampliiljlastula, 75, 81, 145 

 Avvphibtpjdula, 149 

 ampliidisc, 138 

 A til pii idiscophora, 121 

 ^ (r<)f)tnote) 



— diagnosis ami classifica- 

 ' tion, 122, 123 



amphidiscs, 05, 117 



AmpliilfHus, 152 



Avtj)hifijio7igia, 123 



A iiipli IsitDinjiduf, 123 



amphitriaeiie, 134, 140 



Ainphiug, 150 



Amphinlc, 110 



A iiijjhoriscidae, diagnosis 



and genera, 110 

 A nqilioi'Ucns, 110 

 A numixillu, ] 1 

 anatriaene, 133 

 Ancorina, 148 

 Anisoxya, 150 

 Anomudadidai; 149 

 Anomocladiiioe, 149 

 Anomodunclla, 149 

 A nomodtMelliduc, 1 4 9 

 Ano|)lia, diagnosis and 



classilicatioii, 149, 150 

 Antares, 148 

 Anl/umtru, 148 

 aphodal type of canal 



system, 35, 130 

 ajdiodus, 34, 127 

 Aphorme, 122 

 Aj)/iroralli.ili:t, 124 

 apical formative cell, 107 



— ray, 101 



Aplysilla, 44, 64, 78, 154 

 Apli/siUidae, 141, 144, 153 



— diagnosis and genera, 

 154 



Ajdysina, 26, 154 

 ' Aplyxinidae, diagnosis and 

 genera, 154 

 apopylfs, 33 

 aragonite, 167 , 

 I arcliaeocytes, 31, 57, 62, 

 ! 03, 69, 73, 75, 80, 83, 



84 

 , ArdiueoHcyphia, 149 

 I Ardiaco8cyphidu<!, 149 

 arenaceous siwnges, 42, 



144 

 I Artemisina, 152 



articulated tubar skeleton, 



105 

 AscmULi, 110 

 Asmndni,U\, 55, 94, lOO, 



no 



Ascetta, 109, 110 

 Asconema, 7, 122 

 A sconemalidae, diagnosis 



and genera, 122 

 Ascons. 7, 31, 51, 59, 64, 



85,89, 90, 92, 109, 110, 



157, 100 

 Ascysm, 109, 110 

 aster, 117, 134 

 Asteractindla, 150 

 Asierojms, 150 

 AstraeDspoiigia, 1 54 

 AslroliDtia, 150 

 Aslrocladia, 149 

 Astroconia, 123 

 Aslromimus, 151 

 Astroj)r/ditn, 150 

 Astrophora, diagnosis* and 



classification, 147, 148 

 AstidndiTd, 100 

 A siriisdciidar, 1 08 

 Astylo7Huniiti, 150 

 Astylospongiu, 150 

 A Hlyltinpimgidae, 1 50 

 Atradosella, 153 

 attachment, mode of. in 



sponges, 2 

 AulaHcus, 122 

 Auluxinia, 148 

 Auleno, 152 

 Aulettu, 153 

 Auloculyj; 122 

 Anlodione, 122 

 Aulocupidae, diagnosis and 



genera, 149 

 A ulocopiiim, 149 

 Aulorysti.1, 120, 124 

 A itlosarcvs, 1 22 

 autodermalia, 118 

 autophya, 37 



