INDEX 



Numbers in Italics give Systematic Position, 

 refer to Figures 



Numbers in Black Type 



Amph. = Amphlneiira 

 Ast. =Asteroidea 

 Blast. = Blastoidea 

 Crin. =Crinoidea 

 Cyst. — Cystidea 

 Echin. = Ecliinodermata 

 Echinoid. = Echiuoidea 



Eut. = Enteropneusta 

 Gastr. = Gastropoda 

 Hoi. = Holotliurioidea 

 Lam. = Lamellibrancliia 

 Moll. = Mollusca 

 Oph. = Ophiuroidea 



Abatus cavernosus, ajDical system, 324 

 Ahranchia, 12 

 Aainthaster, 299 



,, echinasfer, 421 



,, Mlisii, 421 



AcanthochitoH, 165 

 AamtJwdoris, 13 

 Acanthology, 387 



Acanfhotrochus mirabilis, "wheel," 337 

 Acepluda, 14, 177 

 Accra, 10 

 Aceste, 293 



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

 Aciculidce, G 

 Acjnaea ( = Tectum), 5 

 Acmasidm, 5 

 Acrocidaris, 290 

 Acrocrinidce, 308 

 Acrocrinus, 309 

 Actceon, 110 

 Actceonidce, 10 

 ActhwcrinidcB, 307 

 Actinocrinus, 307 



,, prohoscidcdis, apical system, 



329 



,, verneuilianv.s, 423 



Actinocxicumis, 338 



Actinometra, 313; food grooves, diagr. , 

 366 



„ strata, 365 



Actinopoda, 285 ; oral region, section, 428 

 Adambulacral ossicles, 352 ; radii, 316 

 Adetes, 293 

 Adradii, 316 



^Eolidia, 13 



^Eolidiadm, 13 



uEolis, alimentary canal, 192 



„ rufibrancMalis, 12 

 Mropc, 293 

 Esthetes, 166 

 ^theria, 62 

 Agaricocrinus, 307 

 Agassizia, 293 

 Agassizocrimis, 304 

 Agelacrimis, 313 



„ cincinnatensis, 313 



Aglossa, 14, 177 

 Amalia, 76 

 Ambitus, 338 

 Amhli/pygus, 345 

 Ambulacra, 339 

 Ambulacra! brush (Echinoid.), 433; gills 



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

 316 

 Ammonitidea, 22 

 Amnion, 523 



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

 AmpMaMer, 297 

 Amphidromus, 160 

 Amphineura, 2 

 Amphipeplea, 8 



,, leuconensis, 8 



Amplxisphyra, 46 

 Amphisternal test, 349 

 Ainphiura, 300 



,, magellaniai, 495 



,, squavuita, apical system, 327 ; 



stone canal, 422 



