INDEX 



605 



Astrocnida, 301 

 Astrocrlnida; 315 

 Astrocrinus, 315 



,, Beiniici, 315 



Astrogvinj)h )is, 301 

 Astrogoninm, ;.'9G 



Astropecten aurantiacus, branchial skele- 

 ton, 351 

 Astrvjjectinidcc, J96 

 Astropkytidcc, 301 

 AstmphytuH, 301 



„ Lincki, 301 



AstrojX't'jja, 301 

 Astropyga, 290 

 Astrosc/ieyim, 301 

 Astrotoma, 301 

 Atdearinus, 313 

 Atdestocrinus, SOJf 

 Atlanta, 90, 109 



„ Perunii, 7 

 AtlantidcB, 6 

 Atys, 46 



Auricula, 350, 402 



Auricularia, 506, 507, 508, 511, 512, 

 513, 514 

 ,, of Synapta, 512, 514 



Aicriculidce, 8 

 Avicula, 17 

 Aviculidce, 17 



Axial organ ( = ovoid gland), 437, 445, 446 

 Azygohranchia, 5 



Baoulites stage, 68 

 Balanocrinus, 313 

 Balanoglossus, 562 



,, canadensis, 565 



,, Kotoaievskii, 562 ; branchial 



skeleton, 580 



„ Knpfferi, 571 



,, Merschkovskii, 571 



Barrandeocriiiidce, 309 

 Barmndeocrinus, 309 

 Barrel-shaped larvae (Echin.), 514 

 Barycrinus, 304 

 Basals, 318 



Basibraehial cartilage (Ceph. ), 126 

 Basipterygial cartilage (Ceph.), 127 

 Basomvwtophora, S 

 Bathybiaster, 296 

 Bathycrinidce, 304 

 Baihyorinus Aldrichianus, axial canals, 



378 

 Bathydoris, 13 

 Batocrimcs, 307 



,, pyriformis, 307 



Baur's vesicles, 467 

 Belemnites, 24 ; shell section, 69 

 Beleriinitidce, 24 

 Belemnocrinus, 304 

 Belemnoteuthis, 24 

 Bellerophmitido!, 5 



shell section, 69 



Benthaster, 29S 



Benthodytes, 285 



Berghia, 13 



Bipinnaria larva, 507 ; dorsal aspect, 528 



Biealva, 14 



Bivium, 325, 347, 407 



Blastoidea, 314 



Blauneria, 109 



Bojanus, organ of, 215, 221 



Bornellidce, 13 



Bothriocidaris, 289 



Bothriocidaroida, 289 



Botyocrinus, 304 



BuiirgiieticHnidce, 310 



Bourguetinicrinns, 311 



Brachiolaria larva, 508 



Branchiopneusta, 78 



Brechites {Asperg ilium), 21, 20 



Brisinga, 299 



Brisingidw, 299 



Brissopsis, 293 



Brissus, 293 



Buccal shields (Oph.), 336 ; plates (Echin- 



oid.), 344 

 Buccinidce, 6 

 Bucciniun, 160 

 Bidiminus, S 

 Bulimulidce, 8, 9 

 Bidivius, 8 



,, oblongus, 75 

 ,, perversus, 160 

 Bulla, 10 



,, hydatis, nervous system, 140 

 Bullidoi, 10 



Bulloidea {Ceplwlaspidm), 110 

 Bursse (Oph.), 494 

 Byssus, 112-115, 114 



OALAlIOORINnS, 310 

 Calamus, 69 

 Calcareous cells, 190 

 Calceocrinus, 304 

 Calliaster, 296 

 Callic'ri}ins, 309 

 Oallocystis, 332 

 Callum, 64 

 C'alymne, 293 

 Calyptrcea, 108 

 Calyptrceidce, 6 

 Calyx, 319 

 Cavierata, 306 

 Canaliculata, 310 

 Canceltanidce, 6 

 (Japriiiidce, 18 

 Capididce, 6 

 Cardiacea, 18 

 Cardiaster, 293 

 C'ardiidce, IS 

 Cardita, 17 

 Carditidce, 17 

 Cardimn, 18 



„ edule, nervous system, 144 ; tuber- 

 culatum, 18 



