INDEX 



613 



Olividce, 6 



Ollacrinus (see Gilbertsocrinus) 



Omanastrephes, 24 ; gonad, female, 230 ; 



shell, section, 69 

 Ommatophore, 102 



Ommatost replies, 24 ', nervous system, 148 

 Oncidiella, 46 

 Oncidiidu; S 

 Oncidium, 44, 104 



celticum, genital organs, 235 ; 



larva, 256 



Oneirqphanta mutabilis, rod, 237 

 Onychoteuthis, %4 

 Operciilum, 31 

 Ophiagantha, 300 



,, marsupialis, 495 ; vivipara, 



495 

 Ophiactis, 300 



Miilleri, 506 

 poa, 300 



,, Savigny, 506 

 virens, 498 ; disc, section, 426 

 Ophiarachna incrassata, vertebral ossicles, 



356 



Ophi Master Germani, 421 

 Ophioceramis, 327 

 Ophiocnida, 300 



,. sexradia, 506 



Ophiocoma, 300 



pionila, 506 



Valencice, 506 ; 



Ophiocreas, 301 

 Ophiodermn ( = Ophiura), 495 

 Ophiodiaster, 298 



i/if>lax, regeneration of arms, 



505 

 Oph'm<il //pint, 300 ; bursa, 495, 496 : disc, 



section, "497 



,, albida, stomach, 494 



,, hexactis, 495 



,, lacertosa, ovary, section, 497 



Ophioglyphidce, 300 

 Ophiohelus umbella, arm joint, 357 

 Ophiomastix, 327 

 Ophiomitra exigua, 327 

 Ophwrnusivm, 300 



ml iilum, apical system, 327 



Ophiomyxa, 300 



rirfpara, 495 



Ophiomyxidce, 300 

 Ophionereis, 422 

 Ophioplocus, 422 



Ophiopteron degans, brachial joints, 391 

 Ophiopya longispinus, oral skeleton, 359 

 Ophiopyrgus, 327 

 Ophiothda dividua, 506 

 isidicola, 506 

 Ophiotholia, 392 

 Ophiothrix, 300 



,, frar/ilis, ambulacral tentacle, 



section, 466 ; nervous sys- 

 tem, 456 

 Ophiozona, 300 



VOL. II 



Ophiura, 300 



Ophiura; 300 



Ophiuroidea, 299-301 ; arm, section, 412 ; 

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

 Pluteus, 533 ; nervous system, 456 ; 

 ring sinus, 496 



Opisthobranchia, 10, 33 ; heart, 199 



Opisthopneumonia, 76 



Oral angle plates, 358 

 ,, lobes (Lam.), 105 



Orocystis Helmliackeri, 313 



Orqphocrinus, 315 



stelliformis, 314 



Orphniirgus, 418 



Orthoceras group, 68 



Orthopsis, 299 



Oscainius, 10 



Osphradium, 84, 162-164 



Ostracoteuthis, shell, section, 69 



Ostrea, 17 



edulis, anatomy, 16 



Ostreidtt', 17 



Oivenia, %4 



Oxygynis, 108 



Oxynoe, 12 



Oxynoidea, 12 



PAL^SASTER, 295 

 Palceasteroidea, 295 

 Palceechinoidea, 288 

 Palaxchimis, 289 



elegans, 289 



Pcdceobrissus, 293 

 Palceocoma, 295 

 Pahrocrinoidea, 303 

 Palceopneustes, 293 



Murrayi, 294 



Palceostoma, 295 

 Palocotropus, 429 

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



64, 124 



Palliata ( = Tectibranchia), 46 

 Pallium, 26 

 Palmars (Crin.), 371 

 Palinipes, 297 

 Paludina, ctenidium, 85 



,, riripara, circulatory system, 



203 ; development, 252. 254, 



255 



1'flllllli lli/ll_l , O 



Pancreas (Cepli.), 196 

 Pandoridce, 21 

 Pami /ii'li in, JS5 

 Papulffi, 439 

 Paractinopoda, 288 

 Paramenia impexa, 216 

 ,, palifera, 184 

 Parameniida; 3 

 Parapodia, 106 

 I'n ni r<-Iiiiffter, 296 

 1'in-ii.tidi-nia, 290 



Parasira (Tremoctopus) catenukita, 230 

 Parelpidia, 418 



2 R 2 



