INDEX 



613 



Olivida; 6 



O/ltu-riiitis {see GUbertsoen'niis) 



Omma.'it replies, ^'4 ; gonad, female, 230 ; 



shell, section, 69 

 Onimatophore, 102 



OmmatostrepJies, 2Jt ; nervous system, 148 

 Oiieidiella, 46 

 Oncitlikhr, 8 

 Oncidiuni, 44, 104 



celticmn, genital organs, 235 ; 

 larva, 256 

 Onei rophanta inutabiUs, rod, 237 

 Oui/ehnteufhis, 24 

 Operculum, 31 

 OphiaeiintJia. 300 



marsupialis, 495 ; vivipara, 

 495 

 Ophiaciis, 300 



„ lliilleri, 506 



„ pioa, 300 



&'Ai(/ny, 506 

 ,, virens, 498 ; disc, section, 426 

 Ophiarachna incrassata, vertebral ossicles, 



356 

 Ophidiaster Germanic 421 

 Ophioeeramu, 327 

 Ophiocnida, 300 



,, sexradia, 506 



Ophiocoina, 300 



,, jiumila, 506 



,, Va/encke, 506 ; 



Ophiocreas, 301 

 Ophiodertna ( = Ophiura), 495 

 Ophiodiaster, S9S 



„ diplax, regeneration of arms, 



505 

 Ophioglypha, 300 \ bursa, 495, 496 ; disc, 

 section, 497 

 „ alhida, stomaoh, 494 



,, hexactis, 495 



„ lacertosa, ovary, section, 497 



Opldoglyphidm, 300 

 Ophiohdus umbella, arm joint, 357 

 Ophimnastix, 327 

 Ophiomitra exiijua, 327 

 Ophiomusmm, 300 



,, validum, apical system, 327 



Ophiinnyxa, 300 



„ vivipara, 495 



OpMomyxidm, 300 

 Oplivniereis, 422 

 Opliiiiplucus, 422 



Ophiopteron degans, brachial joints, 391 

 Opldopya longispiniis, oral skeleton, 359 

 Ophi'ipyrgus, 327 

 Ophiothela divid.ua, 506 

 ,, isidicola, 506 

 Ophiotluilia, 392 

 Ophiothrix, 300 



,, fragilis, ambulacral tentacle, 



section, 466 ; nervous sys- 

 tem, 456 

 Ophiozona, 300 



VOL. II 



Ophiura, 300 



Ophiiircc, 300 



Ophiuruidea, S99-301 ; arm, section, 412 ; 

 arm, joint, 357 ; disc, section, 486 : 

 Pluteus, 533 ; nervous system, 456 ; 

 ring sinus, 496 



Opistlwbranchia, 10, 33 ; heart, 199 



Opisthopneumonia, 76 



Oral angle plates, 358 

 ,, lobes (Lam.), 105 



Orneystis Helmhuckeri, 313 



Ornphoerin us, 315 



„ stellifii-eniis, 314 



Orphnurgus, 418 



Orthoceras group, Q?> 



OHlwpsis, 209 



Oscaimus, 10 



Osphradium, 84, 162-164 



OstracoteidJiis, shell, section, 69 



Ostrea, 17 



,, edidis, anatomy, 16 



Ostreidce, 17 



Owetiia, 24 



Oxygyrns, 108 



Oxyiwe, 12 



Oxynoidea, 12 



Pal^aster, 295 

 Pcdaiasteroidea, 295 

 Pedereehinnidea , 288 

 Pulieechiniis, 289 



degans, 289 

 PcdaribrissKs, 293 

 Palmoooma, 295 

 Palancrinvidea, 303 

 PalceopTieustes, 293 



„ Murrayi, 294 



Pidwnstuma, 295 

 Paiiroirnpii s, 429 

 Pallial cavity, 26 ; line, 64, 124 ; sinus, 



64, 124 

 PcdUata { = Tectihranrjiiit), 46 

 Pallivm, 26 

 Palmars (Grin.), 371 

 Palviipes, 297 

 PaludiTW,, ctenidium, 85 



,, rivipara, circulatory system, 

 203 ; development, 252, 254, 

 255 

 Paludinidcc, 5 

 Pancreas (Ceph.), 196 

 Pandoridce, 21 

 Pannychia, 285 

 Papute, 439 

 Paractinopoda, 288 

 Paramenia ivipexa, 216 



,, palifera, 184 



Parameniidce, 3 

 Parapodia, 106 

 PararcJiasler, S96 

 Pa.rasalenia, 290 



Parasira (Tremoctopiis) catenidata, 230 

 Pardpidia, 418 



2 R 2 



