Ochthera, _Latr._, 171 ---- innotata, _Walk._, 171 Ochthiphila, _Fallen_, 147 ---- discoglauca, _Walk._, 147 Ommatius, _Illiger_, 109 ---- scitulus, _Walk._, 109 ---- strictus, _Walk._, 109 Opomyza, _Fallen_, 168 ---- nigrifinis, _Walk._, 168 Ortalides, _Haliday_, 147 Ortalis, _Fallen_, 157 ---- decatomoides, _Walk._, 157 ---- vacillans, _Walk._, 157 Oscinides, _Haliday_, 167 Oscinis, _Fabr._, 167 ---- femorata, _Walk._, 167 Ostrea, 56 Ovula, 41 Oxycera, _Meigen_, 96 ---- manens, _Walk._, 96 Palæornis, 173 Palloptera, _Fallen_, 160 ---- detracta, _Walk._, 160 Paradisea, 180 Paradoxurus, 173 Patella, 38, 39, 87 Pecten maximus, 38 Pericrocotus, 173 Perna, 37 Phasianidæ, 173, 174 Philonotus melanocephala, 175 Phoenicophæus, 176 Pholas, 36, 46 Phora, _Latr._, 17 ---- bifasciata, _Walk._, 172 Phoridæ, _Haliday_, 172 Phyllornithidæ, 173 Picnonotus, 173 Pinna, 60 Piophila, _Fallen_, 167 ---- contecta, _Walk._, 167 Platypezidæ, _Haliday_, 117 Platypeza, _Meigen_, 117 ---- glaucescens, _Walk._, 117 Platystoma, _Latr._, 148 ---- atomarium, _Walk._, 148