INDEX 



Numbers in Italics give System atio Position. 

 refer to Figures 



^Numbers in Black Type 



Amph. = Amphineura 

 Ast. = Asteroidea 

 Blast. =Blastoidea 

 Crin. Crinoidea 

 Cyst. = Cystidea 

 Echin. = Echinodermata 

 Echinoid. = Echinoidea 



Ent. = Enteropneusta 

 Gastr. = Gastropoda 

 Hoi. = Holothurioidea 

 Lam. = Lamellibranchia 

 Moll. = Mollusca 

 Oph. = Ophiuroidea 



ABATUS cavcrnosus, apical system. 324 

 Abranchia, 12 

 Acanthaster, 299 



,, echinaster, 421 



Ellisii, 421 

 Acanthochiton, 165 

 Aca.nUwdoris, 13 

 Acanthology, 387 



Aatiithotrochus rniro.bilis, "wheel." 337 

 Acephala, 14, 177 

 Accra, 10 



Acetabula (Moll.), 117 ; (Echinoid.), 390 



Acicididce, 6 



Acnwca ( = TccturoJ), 5 



Acmaeidce, 5 



Acri'cido.ris, 290 



Ac/'"t:rinidce, 308 



A?r<:r!.iin*. 309 



Actceon, 110 



Actceonidce, 10 



Actiitc/'inidce, 307 



Actiii'icrinus, 307 



,, proboscidali.s, apical system, 



329 



,, cr/-,i(uiliani(s, 423 



Actiiuxvcumis, 338 



Actinometm, 313 ; food grooves, diagr., 

 366 



t rota, 365 



Actiii'>j)oda, 285 \ oral region, section, 428 

 Adambulacral ossicles, 352 ; radii, 316 

 Adetes, 293 

 Adradii, 316 



13 



, alimentary canal, 192 

 nifibranchialis, 12 

 , 293 

 ^Esthetes, 166 

 jEtheria, 62 

 Agaricocrinus, 307 

 Agassizia, 293 

 Agassizoerinus, 304 

 Agelacrinus, 313 



cincinnatensis, 313 



Aglossa, 14, 177 

 A media, 76 

 Ambitus, 338 

 Amblypygus, 345 

 Ambulacra, 339 



Ambulacral bmsh (Echinoid.), 433; gills 

 (Echinoid.), 433; ossicles, 352; radii, 

 316 



A mmon it idea , ;? J 

 Amnion, 523 



Amoebocytes (Moll.) 200 ; (Echin.), 415 

 Amphiaster, 297 

 A inph idrom us, 1 60 

 Amphineura, 2 

 Amphipeplea, 8 



,, leuccmensis, 8 



A//(phisphyra, 46 

 Amphisternal test, 349 

 Amphiura, 300 



magellanica, 495 

 ,, squamata, apical system, 327 ; 

 stone canal, 422 



