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THE VOYAGE OF H.M.S. CHALLENGER. 



Ophioplax ljungmani, Lym., 164, 314, 325 (PI. 



XLI. fig. 7). 

 Ophiopleura, Danielsson, 31. 



arctica, Duncan, 31, 317. 

 horcalia, Danielssen, 31, 317. 

 Ophioplinthus, Lym., 28. 



grisea, Lym., 30, 295, 318, 321 (PL 



XXIV. figs. 10-12). 

 medusa, Lym., 29, 295, 318, 321 (PL 

 XXIV. figs. 7-9 ; PL XXXVIII. 

 figs. 1-5). 

 Ophiqplocus, Lym., 20. 



esmarki, Lym., 20, 310, 324. 

 imbricatus, Lym., 20, 310, 323 (PL 



XXXVII. figs. 10-12). 

 t' ssettatus, Lym., 20. 

 Ophiopsammium, Lym., 231. 



semperi, Lym., 231, 313, 326. 

 Ophiopsammus yoldii, Ltk., 12. 

 Ophiopsila, Fbs., 159. 



annulosa, Ltk., 160, 311, 324. 

 aranea, Fbs., 100, 311, 314, 324. 

 fidca, Lym., 100, 311, 314, 316, 325. 

 marmorea, Ltk., 160. 

 riisd, Ltk., 100,311, 314,325 (PL XL. 

 figs. 1-3). 

 Ol)htopteris,'Sj. A. Smith, 176. 



antipodum, E. A. Smith, 168, 176, 

 312. 

 OpMopyren, Lym., 104. 



brevispinus, Lym., 105, 298, 315 (PI. 



XII. figs. 1-3). 

 longispinus, Lym., 105, 287, 315 (PL 

 XII. figs. 4-6 ; PL XXXIX. figs. 4-0). 

 OpMopyrgus, Lym., 33. 



wyville-thomsoni, Lym., 33, 298, 315 

 (PI. IX. figs. 15-17). 

 Ophiopus, Ljn., 156. 



arcHcus, Ljn., 156, 311, 316, 323. 

 Ophiostiasma, Lym., 235. 



attenuatum, Lym., 236, 290, 316 (PL 

 X. fig. 13; PL XVI. figs. 1-3). 

 Ophioscolex, Mull. & Tr., 232, 234. 



coppmgeri, Bell., 232, 234. 

 dentatus, Lym., 232, 233, 291, 315 (PL 

 XXIV. figs. 4-6). 



Ophioscolex glacialis, Mull. & Tr., 232, 234, 315, 

 316 (PL XLII. figs. 2-4). 

 purpureus, Dub. & Ivor., 232, 231, 310. 

 stimpsonii, Lym., 232, 234, 316. 

 tropicus, Lym., 232, 233, 287, 316 (PL 

 XXIV figs. 1-3). 

 Ophiostigma, Ltk., 164. 



africauum, Lym., 165, 289, 311, 325 



(PL XVIII. figs. 17-19). 

 formosa, Ltk., 165, 166, 311, 325. 

 isacanthum, Lym., 165, 311, 314, 325 



(PL XLII. iig. 16). 

 inoniliforme, Ltk., 165. 

 tenuc, Ltk., 166, 311, 325. 

 Ophiothamnus, Lym., 211, 286. 



affinis, Ljn., 213, 318. 



remotus, Lym., 212, 291, 314, 323 



(PL XIV figs. 1-3). 

 vicarius, Lym., 212, 213, 260, 287, 

 312, 314, 325 (PL XLII. fig. 1). 

 Ophlothela, V1L, 230. 



dance, V1L, 230, 312, 320. 

 dividua, v. Mart., 230, 231, 312. 

 iddicola, Ltk., 230, 231, 312, 320. 

 mirabilis, V1L, 230, 312, 320. 

 tigris, Lym., 230, 312. 

 verrilU, Duncan, 231, 312. 

 Ophiotholia, Lym., 238. 



supplieans, Lym., 239, 305, 319, 322 

 (PL XXVIII. figs. 1-4). 

 OpJriothrix, Mull. & Tr., 213. 

 alba, Grube, 224. 

 alopencrus, Mull. & Tr., 214, 215, 225, 



312, 325. 

 angulata, Ayres, 214, 216, 218, 219, 



286, 287, 290, 312, 315, 325. 

 aristulata, Lym, 218, 223, 291, 295, 

 296, 315, 323 (PL XXI. figs. 

 9-12). 

 aspidota, Mull. & Tr., 217, 227, 312, 



325. 

 bcrberis, Lym., 216, 221, 300, 302, 



315, 325 (PL XXI. figs. 1-4). 

 caspitosa, Lym., 216, 218, 296, 312 (PI. 



XXVI. figs. 12-14). 

 capensis, Ltk., 218, 224, 228, 312. 



