154 



THE LIFE OF THE MOLLUSCA 



Pearl Oyster. See Meleagvina. 



Pearls, 5, 140, 141 



Pearls, origin of, 79 



Pecten (Scallop Shell), 34, 112, 



119, 133 



Pecten maximus, 55 



Pecten opercular is, 55 



Pecten varius, xv. 



Pectenacea, 133 



Pectinate gill, iii. 



Pectinibranchia, 24 



Pectinidse, 46 



Pectunculus = Glycimeris 



Pedal ganglia, 8 



Pedicularia, 121 



Pedipes, 116 



Pedum spondyloides, xvii. 



Pelagia alba, xxvi. 



Pelecypoda, 26, 51, 130 



Pen-and-ink Fishes, 42 



Periostracum, 3 



Periphery, 19 



Peristome, 19 



Periwinkle. See Littorina. 



Pema, 63 



Petricola pholadiformis, 134, xxxii, 



Petricolidae, 49 



Phasianella Australis, ix. 



Philine, in 



Philine aperta, xii. 



Philobrya, 82, 92 ,. 



Philobryidae, 109 



Philomycus, 106 



Pholadella, 46 



Pholadidea, 98 



Pholadomya Candida, xx. 



Pholas (Piddock), 54, 119, 133 



Pholas rivicola.sy 



Phragmocone, 40 



Phyllirrhoe, 56, 105 



P/zysrt (Bubble Snail), 53, 65, 



105 

 Physa fontinalis, xiii. 

 Physidae, 58 

 Phytia myosotis, xiii , 

 Piddock. See Pholas. 

 Pinna, 4, 133, 141, 142 

 Pinna nobilis, xviii. 

 Pinnidse, 46 



Pisidium, 59, 92 



Pisidium amnicum, xv. 



Placuna placenta, 141 



Planktomya, 119 



Planorbidae, 58 



Planorbis (Flat-coiled Water 

 Snail), 10, 18, 48, 53, 65, 73, 90 



Planorbis corneus, xiii. 



Platyceras, 44 



Pleural ganglia, 8 



Pleurobranchidse, 132 



Pleurobranchus, 131 



Pleuroceridae, 58 



Pleurodonta crassilabris, 135 



Pleurodonta imperator, 135 



Pleuropodia, 116 



Pleurotoma, 20 



Pleurotoma Babylonia, vii. , xii. 



Pleurotomarifl, 20, 125, 128, 129 



Pleurotomaria Adansoniana, 144 



Pleurotomaria Anglica, vii. 



Plicatula, 64 



Pneumoderma violaceum, xxvi. 



Polita, 70, 126 



Polita cellar ia (Cellar Snail), 68, 

 xiii. 



Polygyra hirsuta, viii. 



Polygyra thyroides, 78 



Polygyratia polygyrata, xiii. 



Polyplacophra, 7, 14 



Polypus (Octopus), 36, no 



Polypus Digueti, 91 



Polypus tuber culatus, xxv. 



Polypus tuber culatus : mandibles, 

 iii. 



Polypus vulgaris (Common Octo- 

 pus), 43 



Pomatias, 77 



Pomatias elegans, 87, ii. , viii. 



Pomatiidae, 60, 116 



Pond Mussel, kept many days 

 out of water, 75 



Pond Snails, 58 



Poromya hyalina, xx. 



Poromyiidae, 35 



Posterior Canal, 20 



Pot amides, 57 



Priscochiton, 46, 102 



Prodissoconch, 30, 94 



