INDEX. 



Pages on which the descriptive accounts of families, genera and species occur are indicated by black- 

 faced type. 



abyssicola (Chirodota), 119. 

 " (Echinosoma), 179. 



" (Protankyra), 22, 25, 99, 105. 



" (Synapta), 105. 



(Trochostoma), 157. 

 acuuthia (Leptosynapta), 87, 92. 



" (Synapta), 82. 

 Acanthotroehus, 12, 13, 17, 22, 46, 52, 127, 129, 130, 



131, 133. 



Aeaudina, 20, 22, 135, 136, 156, 178, 186, 187. 

 Achiridota, 17, 22, 112, 126, 131, 133. 

 Actinopoda, 13, 135. 

 Actinopodida, 13. 

 aculeata (Protankyra), 99, 104, 105. 



" (Synapta), 104. 

 HCiitiim (Ankyroderma musculus), 165. 

 affine (Ankyrodorma), 163. 

 affinis (Molpadia), 31, 158, 163, 164. 

 agassizii (Ankyroderma), 169. 

 " (Molpadia), 159, 169. 

 " (Synapta), 78. 

 albatrossi (Protankyra), 100. 

 albicans (Caudina), 37, 173, 174, 175. 

 " (Synapta), 88. 

 " (Trochostoma), 37, 174. 

 albopunctata (Chondroelnea), 84. 

 alcocki (Gephyrothuria), 22, 186. 

 amboinensis (Chiridota), 117, 118. 



" (Chirodota), 117. 



amorpha (Molpadia), 31, 158, 164. 

 Anactinopoda, 13. 

 Anactipoda, 13. 



Anapta, 12 13, 16, 17, 22, 71, 109, 111, 131, 133. 

 andamanense (Trochostoma), 162. 

 andamanensis (Haplodactyla), 182. 



" (Molpadia), 158, 162, 163, 168, 170. 



Ankyroderma, 12, 13, 18, 19, 142, 156. 

 antarctica (Molpadia), 32, 36, 144, 159, 163, 168. 

 antarcticum (Trochostoma), 162, 168. 

 Aphelodactyla, 20, 22, 143, 149, 153, 154, 155, 156, 



180, 186, 187, 188. 

 Apneumona, 11, 12. 

 Apneumones, 11. 

 Apoda, 12, 13. 

 Apodes, 11, 13, 14. 

 Apodia, 11. 

 arctica (Haplodactyla), 169. 



" (Molpadia), 31. 32, 36, 159, 163, 168, 169. 

 arcticum (Trochostoma), 169. 



arenata (Caudina), 22, 36, 37, 38, 41, 135, 146, 147, 

 149, 150, 151, 152, 154, 155, 173, 174, 177, 185. 

 " (Chirodota), 20, 174. 



arenicola (Liosoma), 145, 171. 



" (Molpadia), 33, 159, 171. 



(Trochostoma), 171. 



armata (Caudina arenata), 37, 174, 175. 

 aspera (Chondrocloea), 85. 

 Aspidochir, 113. 

 Aspidochirot.T, 21. 

 astrolabi (Synapta), 78. 

 asymmetrica (Protankyra), 100, 107. 



(Synapta), 107. 

 australiana (Chiridota), 17. 



" (Chirodota), 122, 124. 



australianus (Twniogyrus), 22, 29, 121, 122, 125. 

 australis (Aphelodactyla), 181, 182. 



(Haplodactyla), 182. 

 " (Molpadia), 20, 175. 

 autopista (Protankyra), 99, 103. 



" (Synapta), 103. 

 ayresi (Synapta), 88. 

 " (Trochostoma), 157. 



bachei (Synapta), 87. 



bankensis (Protankyra), 100, 108. 



" (Synapta), 108. 



benedeni (Protankyra), 100, 106. 



" (Synapta), 106. 

 bergensis (Synapta), 91, 92. 

 beselii (Chondroclosa), 78. 



" (Synapta), 15, 78, 79. 

 bicornis (Protankyra), 26, 98, 101. 

 bidentata (Protankyra), 99, 102. 



" (Synapta), 102. 



bifaria (Synapta), 88. 

 blakei (Molpadia), 33, 159, 168, 169. 



" (Trochostoma), 168. 

 boreale (Trochostoma), 32, 160, 169. 

 borealis (Molpadia), 31, 36, 160, 168. 

 brevicauda (Caudina coriacea), 175, 176. 

 brevieaudata (Molpadia), 160, 171. 

 brevicaudatum (Ankyroderma), 171. 

 brevis (Chiridota), 128. 

 briareus (Thyone), 180. 

 brychia (Protankyra), 25, 99, 103, 104. 



" (Synapta), 103. 

 buskii (Labidoplax), 22, 44, 57, 94. 



" (Synapta), 94. 



caerulea (Molpadia parva), 36. 

 calif ornica (Caudina), 37, 173, 177. 

 caudata (Caudina), 175. 



" (Microdactyla), 175. 

 caudatum (Trochostonm concolor), 161. 



L'.'7 



