512 



Orange-tipped Eolis, 308, pi. 15) 

 Orbigny's Barrel-bubble, 282, pi. 26q 

 Orbigny's Sun-dial, 142, pi. 21X 

 Orcutt's Caecum, 149, fig. 37-I 

 Oregon Triton, 194, pi. 24g 

 Ornamented Spindle, 243, pi. iic 

 Ornate Scallop, 363, pi. 34b 

 Orpheus Trophon, 208, fig. 466 

 Otto's Spiny Margarite, no 

 Oval Corbula, 456 

 Owl Limpet, see Giant Owl Limpet, 



lOI 



Oyster Drills, species of, 213 



Oysters, species of, 373-375, pis. 28, 29 



Oyster Turret, 270, pi. 26n 



Pacific Awning Clam, 333 



Pacific Bob-tailed Squid, 479 



Pacific Chinese Hat, 169, pi. 20-I 



Pacific Cleft Clam, 384, fig. 77a 



Pacific Crenulate Nut Clam, 335 



Pacific Gaper, 450, pi. 31Z 



Pacific Grooved Alacoma, 434 



Pacific Half -slipper Shell, 170, pi. 20k 



Pacific Left-handed Jewel Box, 393 



Pacific Mud Piddock, 461 



Pacific Orange Hoof -shell, 166 



Pacific Orb Diplodon, 383 



Pacific Pink Scallop, 364, pi. 34k 



Pacific Plate Limpet, 104 



Pacific Razor Clam, 442, pi. 29y 



Pacific Rough Piddock, 462 



Pacific Spear Scallop, 364, pi. 34) 



Pacific Thorny Oyster, 370, pi. 36a 



Pacific White Venus, 416 



Painted Balloon Eolis, 310, pi. i5h 



Pamted Canthanis, see Tinted Can- 



tharus, 233 

 Painted Limpet, 104 

 Painted Spindle, 244, fig. 54c 

 Pale Northern Moon-shell, 190, fig. 43c 

 Pale Tulip, see Banded Tulip, 242 

 Pallial sinus, definition of, 84 

 Panama Horse Conch, 242 

 Panamanian Vase, 245 

 Pandoras, species of, 469 

 Panelled Tusk, 328 

 Panther Cowrie, 7 

 Paper-bubbles, species of, 276, 283 

 Paper Fig Shell, see Common Fig Shell, 



200 

 Paper Mussel, 353, pi. 28i 

 Paper Nautilus, Common, 485, pi. ic 



egg laying, 49 

 Paper Scallop, 362 

 Paper Spoon Clam, 472, pi. 28W 

 Papillose Eolis, 308, pi. i5g 

 Parasitism, 19, fig. 4 



of sea cucumber, 23 

 Parietal wall, definition of, 76 

 Partridge Tun Shell, see Atlantic Par- 

 tridge Tun, 199 

 Pea-pod Borer, see Falcate Date Mussel, 



356 

 Pea Strigilla, 429 



Index 



Pearl Oyster, Atlantic, 359, pi. 35c 

 Pearly Jingle, see Peruvian Jingle Shell, 



372 

 Pearly Mania, see False Jingle Shell, 



372 



Pear-shaped Marginella, 260, fig. 56n 



Pear Whelk, 236, pi. 9g 



Pebble-shell, see Lord's Dwarf Venus, 

 411 



Pectens, species of, 361 



Pectinate Cuspidaria, 477 



Pedicularia, Decussate, 181, pi. 7d 



Pelagic mollusks, Janthina, 17 

 pteropods, 17 



Pelecypod features, 81 



Pelican's Foot, American, 173, pi. 23c 



Penciled Dove-shell, 221 



Pender's Nut Clam, 339 



Pennsylvania Lucina, 385, pi. 38h 



Pen Shells, species of, 360 

 structure of, 34 



Periostracum, definition of, 77 



Peristome, definition of, 75 



Periwinkles, species of, 132-134, pis. 19, 

 20 



Perry's Drillia, 270 



Peruvian Jingle Shell, 372, pi. 29e 



Perverse Whelk, 236, pi. 23k 



Pheasants, species of, 126 



Philippi's Nutmeg, 253, fig. 55d 



Phoenicians, 11,12 



Piddocks, species of, 461 



Pillowed Lathe-shell, see Western Bar- 

 rel-bubble, 281 



Pilose Doris, 305, pi. 15b 



Pilsbry, H. A., 68, 138 



Pilsbry's Tusk, 330, fig. 69d 



Pimpled Diplodon, 383 



Pink Abalone, 93, pi. 2c 



Pink Conch, see Queen Conch, 1 74 



Pisa Shell, see A4iniature Triton Trum- 

 pet, 233 



Pismo Clam, 412, pi. 3ih, fig. 28d 



Pitted Murex, 204, fig. 45b 



Planaxis, species of, 150 



Platform Mussel, see Conrad's False 

 Mussel, 382 



Plectrum Buccinum, 225, fig. 51a 



Plee's Stripped Squid, 483 



Pleurobranch, Atlantic, 286, fig. 61 



Pleurotomarias, 92 



Plicate Egg Shell, see Single-toothed 

 Simnia, 182 



Plicate Horn Shell, 152, pi. 191 



Pliny, 1 1 



Pointed Cingula, 136 



Pointed Egg Shell, see Common West 

 Indian Simnia, 182 



Pointed Marginella, see Common Atlan- 

 tic Marginella, 257 



Pointed Nut Clam, 338 

 Pointed Venus, 409, pi. 39) 

 Poisoning by mussels, 39 

 Poisonous snails, 4 

 Polishing shells, 63 



Polite Marginella, 258 



Ponderous Ark, 346, pi. 272; fig. 28a 



Popular books listed, 491 



Popular names, 85 



Poromya, Granular, 475, pi. 30s 



Porter's Blue Doris, 303, pi. 16-I 



Portuguese Oyster, 374 



Posterior canal, definition of, 76 



Poulson's Dwarf Triton, 218, pi. 24k 



Pourtales' Abalone, 94 



Pourtales' Glass Scallop, 369, pi. 27c 



Precious Wentletrap, 6 



Prehistoric uses, 7 



Pribiloff Neptune, 230, pi. 24r 



Prickly Cockle, 397, pi. 39-0 



Prickly Jingle Shell, 372 



Prickly-winkles, species of, 134 



Princess Marginella, 257, fig. 56) 



Princess Venus, 404, pi. 32m 



Priority, rule of, 85, 86 



Prodissoconch, definition of, 81 



Promera Tellin, 424, fig. 86c 



Pronunciation of scientific names, 87 



Propeller Clam, Northern, 453 



Protobranchs, species of, 334 



Pteropods, species of, 292-299, fig. 64 



Punctate Mangelia, 272, fig. 57a 



Puncturellas, species of, 95, 96 



Puppet Margarite, 109, fig. 31c 



Purple Clam, see Nuttall's Mahoganv 



Clam, 439 

 Purple Drill, see Mauve-mouth Drill. 



21 1 

 Purple Dwarf Olive, 247, pi. i2i 

 Purple Dye, 12, 13 

 Purple-hinged Scallop, see Giant Rock 



Scallop, 369 

 Purple Sea-snails, habits, 17 



species of, 160, pi. 4 

 Purplish Pacific Tagelus, 441, pi. 29s 

 Purplish Semele, 435, pi. 40b 

 Purplish Slender Chiton, 320 

 Purplish Tagelus, 440, pi. 30g 

 Purpuras, species of, 213 

 Pygmy Colus, 229, pi. 23m 

 Pvrams, species of, 288, figs. 62, 63 



Quadrate Paper-bubble, 283, fig. 596 

 Quahog, Northern, 406, pi. 32h 

 Queen Charlotte Macoma, 433 

 Queen Conch, 174, pi. 23a 

 Queen Helmet Shell, see Emperor Hel- 

 met, 193 

 Queen Marginella, 256, fig. 566 

 Queen Tegula, 120, pi. 3f 

 Queen Venus, 405, pis. 38m, 3211 

 Quoy's Pleurotomaria, 92 



Rachidian tooth, 78 



Rachiglossate, 79 



Radial sculpture, definition of, 84 



Radula, 78, figs. 6, 25 



Ragged Sea-hare, 286 



Ram^s Horn, see Common Spirula, 478 



Rangia, Brown, 450, fig. 91 



