obscurtis, Pleiironectes, 368, 309 

 oceanica, Limanda, 334 

 ocdlaris, Clucnopsetta, 72 



— Paralichthys, 73 



— Platessa, 69, 72 



— Pseudorhombus, 72 

 ocellata, Psettylis^ 238, 239, 243 



— Taniopsetta, 122, 123 

 ocellatus, Bothus, 221, 222, 223 



— Citharichihys, 132 



— Hemirhombus, 132 



— HippoglossHS, 132 



— Neorhombus, 102 



— Platophrys, 222 



— Pleuronickthys, 318, 325 



— Psammodiscus, 415, 416 



— Psettylis, 235 



— Pseudorhombus, 122 



— Rhomboidichthys, 222 



— Rhombus, 220, 222, 238 

 ocellifer, Pseudorhombus, 106, 107 

 Oil-globule, 30 



o/tfOSKS, Reinhardtius, 289 

 Olfactory laminae, 41-43 

 oligodon, Paralichthys, 99 



— Pseudorhombus, 90, 98, 99, 100, 108 



— Rhombus, 99 



oligolepis, Pseudorhombus, 1 18 



— Rhombus, 118 



— Spinirhombus, 118 



— Tarphops, 118, 119 

 olivacea, ChcEtiopsetta, 84 

 olivaceus, Hippoglossus, 84 



— Paralichthys, 71, 84, 85 



— Pseudorhombus, 84 

 ommatus, Paralichthys, 127 

 Oncopterina?, 35 



Oncoptirus, 413, 414 ; olfactory laminae, 42 



— darwinii, 414 

 Opercular apparatus, 17, 18 

 ophthalmolepis, LepidoblepJuiron, 401, 402 

 ophyras, Paralichthys, 73 



Optic chiasma, 13, 28, 29 

 orbicularis, Scceops, 209 

 orbignyana, Paralichthys, 70, 71, 72 



— Platessa, 71 



Origin, 5-9, 37 ; polyphyletic, 2, 4, 37 

 ornaiMS, Satnaris, 402, 404 

 Orthopsetta, 139 



— sordidus, 139, 140 

 orthorhynchus, Hippoglossus, 58 

 os/foumori, Glyptoccplmlus, 366 

 os(roMmoa/i, Glyptocephalus, 366 

 otoAtt, Kt'ms^cr, 309 

 Otocystic spines, 31 

 Otoliths, 8 



ovale, Syacium, 130, 132, 133, 134 

 ovo/ts, Ammotrctis, 420 



— Bothus, 222, 235, 236, 238, 239 



— Citharichthys, 133 



— Hemirhombus, 133 



— Platophrys, 238 



29 



Pacific Halibut, 293 

 pacificus, Cynicoglossus, 360 



— Glyptocephalus, 360 



— Microstomus, 356, 360 

 patulus, Citharichthys, 130 



— Hemirhombus, 129, 130 

 palad, Platophrys, 94 

 pallasii, Pleuronectes, 348, 349 

 pallidus, Scidorhombus, 60 

 />flHawt:ttSis, Azevia, 137 



— CitharicJUhys^ 134, 137 



— Cyclopsctta, 135, 137, 138 

 pantherina, Psetta, 233 

 pantherinus, Bothus, 221, 233, 234 



— Bothus {Platophrys), 234 



— Platophrys, 233, 238 



— Platophrys {Platophrys), 233 



— Pseudorhombus, 233 



— Rhomboidichthys, 233 



— Rhombus, 233 

 papulosa, Armaca, 130 



— Platessa, 130 

 papillosum, Syacium, 129, 130 

 papillosus, Pleuronectes, 130, 131 



— Zeugopterus, 280, 281, 282 

 Parabothus, 172, 173, 240 



— chlorospilus. 240, 241 



— coarctatus, 240, 243 



— malhensis, 240, 244 



— tnancus, 230 



— polylepis, 240, 241, 243 



— violaceus, 240, 242 

 Paracitharus, 170 



— macroUpis, 170 

 paradoxum, Amphistium, 10 

 Paralichthinae, 38, 39, 60, 61 ; distribution, 48, 



49 

 Par alichth odes, 3G, 398 ; olfactory lamina, 42 



— algoensis, 398 



Paralichthodina?, 36, 40, 282, 398 ; distribution, 



Paralichthys, 

 changes, 



6r, 69, 70, 89, 91 ; colour 

 reversal, 28 ; optic chiasma, 



— adspcrsus, 71, 83, 86 



— tzstuarins, 71, 82, 83 



— albigutla, 70, 75, 76, 77 



— bicyclophorus, 70, 78 



— brasiliensis, 70, 77, 78 



— californicus, 69, 70, 71, 81, 82 



— cccruleosticta, 71, 88 



— coreamc«5, 84 



— deniatus, 24, 70, 72, 73, 74, 75, 76 



— fernaiuiezianus, 71, 87 



— hilgcndorfi, 70, 71, 87 



— isosceles, 70, 80 



— jordani, 88 



— kingii, 83, 84 



— lethostigma, 70, 74, 75, 76 



— liolepis, 120 



— hwch/oxks, 8i 



