INDEX 



Numbers in Italics give Systematic Position. Numbers in Black Type 



refer to Figures 



Amph. = Amphiueura 

 Ast. = Asteroidea 

 Blast. = Blastoidea 

 Crin. Crinoidea 

 Cyst. = Cystidea 

 Echiu. = Echinodermata 

 Echinoid. = Echinoidea 



Eut. = Enteropneusta 

 Gastr. = Gastropoda 

 Hoi. = Holotnurioidea 

 Lam. = Lamellibranchia 

 Moll. = Mollusca 

 Oph. = Ophiuroidea 



cavernosus, apical system, 324 

 Abranchia, 12 

 Acanthaster, 299 



,, echinaster, 421 



Ellisii, 421 

 Acanthochiton, 165 

 Acanthodoris, 13 

 Acanthology, 387 



Acanthotrochus /inrabilis, "wheel," 337 

 Acephala, 14, 177 

 Acer a, 10 

 Aceste, 293 



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

 Aciculidce, 6 

 Acmaea ( = Tcctura), 5 

 Acmaeidce, 5 

 Acrocidaris, 290 

 Acrocrinidce, 308 

 Acrocrinus, 309 

 Actceon, 110 

 Actceonidce, 10 

 Actinocrinidci', 307 

 Actinocrinus, 307 



,, proboscidalis, apical system, 



329 



,, verneuilianus, 423 



Actinocucumis, 338 

 Actinometm, 313; food grooves, diagr., 



366 



strota, 365 



Actinopoda, 285; oral region, section, 428 

 Adambulacral ossicles, 352 ; radii, 316 

 Adetes, 293 

 Adradii, 316 



13 

 ^Eolis, alimentary canal, 192 



,, rujtbranchialis, 12 

 JErope, 293 

 ^Esthetes, 166 

 ^Etheria, 62 

 Agaricocrinus, 307 

 Agassizia, 293 

 Agassizocrinus, 304 

 Agelacrinus, 313 



,, ciiicinnatensis, 313 



Aglossa, 14, 177 

 Amaiid, 76 

 Ambitus, 338 

 Aniblypygus, 345 

 Ambulacra, 339 



Ambulacral brush (Echinoid.), 433; gills 

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

 316 



.1 in iiwnitidea, 22 

 Amuion, 523 



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

 Amphiaster, 297 

 Amphidromus, 160 

 ^1 iiiphineura, 2 

 Amphipeplea, S 



,, leuconensis, 8 



Amphisphyra, 46 

 Amphisternal test, 349 

 , 300 



magellanica, 495 

 squamata, apical system, 327 : 

 stone canal, 422 



