INDEX 



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

 names of Authors discussed in the text. 



Abacocrinns, 165 

 abactinal skeletal elements, 



109 



Abatus, 322 

 aboral circular sinus (Oph.), 



266 



Abracrinvs, 166 

 Abrotocrinus, 180 

 Acacocrinus, 166 

 Acanthar -chaster, 251 

 Acanthaster, 258 

 Acanthechinus, 309 

 Acanthocrinus, 201 

 Acanthocystis, 46 

 acanthosphenote, 287 

 Acanthotrochus, 234 

 accessory intestine, 27 



plates (Ast. ), 246 

 Acentrotremites, 90, 92 

 Aceste, 322 

 Achlyonice, 229 

 Achradocrinus, 178 

 Achradocystis, 55 

 Acrochordocrinus, 192 

 Acrocidaris, 307 

 Acrocrinus, 159 

 Acrosalenia, 306 

 .dcrcmra, 278 



actinal furrows (Ech.), 317 



skeletal elements, 109 

 Actinocrinus, 169 

 Actinocucnmis, 230 

 actinogonidial, 237 

 actino-lateral spines, 256 

 Actinometra, 196 

 Actinophyma, 310 

 Actinopoda, 227 

 actinostomial ring (Ast.), 



241 



Actinozoa (Leuckart), 33 

 adambulacral, 20 



mouth, 247 

 adambulacrals (Grin.), 115 ; 



(Ast.), 241 ; (Oph.), 270 

 Adelocrinus, 201 



Adelojmeustes, 316 

 Adetinae, 321 

 adetopueustic, 254 

 adradii, 20 

 Adunata, 155 

 Aeolopneustes, 313 

 Aerope, 322 

 Aesiocrinus, 180 

 Aesiocystis, 208 

 Aethocystis, 57 

 Aetites, 53 

 Aganaster, 275 

 Agaricocrinus, 167 

 Agassiz, A., 240, 285 

 Agassiz, L., 240, 260, 261, 



284 



Agassizia, 322 

 Agassizocrinus, 181 

 Agelacrinoidea, 205 

 Agelacrinus, 207 

 Agelacystis, 207 

 Agdadiscus, 208 

 Agriocrinus, 156 

 Aldrovandus, U., 283 

 ^IZecfo, 195 

 Alexandria, 318 

 Allagecrinns, 151 

 Allionia, 201 

 Allocrinus, 162 

 Allocystis, 72 

 Alloirmsallocrinus, 167 

 Amblacrinus, 156 

 Aiiibli/pneustes, 313 

 Amblypygus, 320 

 ambulacra, 2, 15 ; (Blast.), 



78 ; (Ech.), 286 

 ambulacralia, ambulacrals 



(Crin.), 100, 115; (Ast.), 



241 ; (Ech.), 288, 296 

 ambulacral mouth, 247 

 amnion (Ech.), 15 

 amoebocytes, 22 

 Amorphocystis, 55 

 Amj)lieristocrinus, 173 

 Amphiaster, 254 



Ampkiglypha, 278 

 Amphilepis, 278 

 Amphipholis, 278 

 amphisternous, 318 

 Amphiura, 278 

 Amphora, 169 

 Amphoracrinus, 170 

 Amphoracystis, 47 

 Amphoridea, 43 

 ampulla, 290 

 Amygdalocystis, 58 

 anal plates (Criu.), 119 ; 

 (Ech.), 294 



spiracle, 85 



tube, 131 



x, 119 

 Ananchytes, 321 

 Anapta, 234 

 Anasterias, 258 

 Anaulocidaris, 314 

 anchylosis, 108 

 Ancyrocrinus, 177 

 anectobrauchiate, 304 

 Anisocrinus, 189 

 Ankyroderma, 233 

 Anocftanus, 320 

 Anomalanthus, 318 

 Anvmalocrinus, 146 

 Anomalocystis, 51 

 Anorthopygus, 320 

 Antedon, 195 

 Anthenea, 253 

 Anthenoides, 253 

 Anthocystis, 62 

 Anthemocrinus, 200 

 Anthocrinits, 176 

 antimeres, 19 

 Aorocrinus, 167 

 Aphroditaster, 251 

 apical nervous system, 30 



system (Crin.), 112; 

 (Oph.), 268 ; (Ech.), 286, 

 294. See also calyciual 



Apiocrinus, 191 

 Apiocystis, 61 



