152 
Malleus vulgaris, xvii. 
Mandibles, 9 
Mangilia teniata, xii. 
Mantle, 2 
Mantle cavity, 36 
Mantle opening in bivalves, 27, 
iv. 
Margarita, 63 
Margaritana margaritizeva (Fresh- 
water Pearl Mussel), 140 
Marginella, 63, 125 
Marine forms on land, 59 
Marisa cornu-arietis, v. 
Martesia acuminata, xx. 
Medicine, Snails used in, 140 
Megalodontidz, 46 
Megaspiva elatior, xiii. 
Melampus, 116 
Melania, 48, 52, 88, 91 
Melaniidz, 58 
Melanopsis, 52 
Meleagrina (Pearl Oyster), 5, 79, 
140 
Mi seaetne barbata, xvi, 
Meleagvina margaritifer, xvii. 
Mercenavia Mortoni, xvi. 
Meretrix dione, xix. 
Metapodium, 117 
Metostvacon, 106 
Mimicry, 123 
Mitra episcopalis, xi. 
Mitrularia Dillwyni, x. 
Modiolaria, 63 
Modiolavia marmovata, 80 
Modiolavia marmovata, Embryo, 
xxix. 
Modioloides priscus, 45 
Modiolus = Volsella 
Moisture, need of, 70 
Mollusca, definition, 1 
Money Cowry, 142 
Monomyaria, 34 
Monopleuva imbricata, xix, 
Montacuta, 80 
Montacuta substriata, xviii. 
Money, Shells used for, 142 
Morum cancellata, v. 
Mother of Pearl, 4 
Mouth of Shell, 19 
THE LIFE OF THE MOLLUSCA 
Mucus used in crawling and 
climbing, 115 
Murchisonia, 45 
Murex, 68, 69, 143 
Murex haustellum, xi. 
Murex palma-rose, v. 
Murex vamosus, xxxii. 
Murex tenuispina, v. . 
Mussel, Common Marine. 
Mytilus. 
Mussels, Freshwater. See Uni- 
onida, 
Mutelidz, 58 
Mya, 35, 57, 63, 118, 133 
Mya truncata, xv., xix. 
Myidz, 108 
Myochama anomoides, xx. 
Myopsida, 42, 132 
Mytilide, 9, 46, 109, 132 
Mytilus (Common Mussel), 26, 
34, 53, 54, 57, 61, 74, 107, 112, 
113 
Mytilus Californicus, xvi. 
Mytilus edulis, 61 
Mytilus samaragdinus, xviii. 
Myzomenia Banyulensis, Embryo, 
xxix, 
See 
Nacreous layer, 4 
Nassa (Dog-Whelk), 24, 54, 68, 
87, 104 
Nassa arcularia, xi, 
Nassa callosa, 142 
Nassa nervitea, xi. 
Nassodonta, 58 
Natalina, 70 
Natica, 19, 68, 116, 132 
Natica Alderi, ii. 
Natica didyma, vi. 
Natica heros, vi. 
Natica mamiilia, vi. 
Natica monilifeva: radula, iii, 
Natica Recluziana, vi, 
Naticide, 132 
Nautiloidea, 39, 41, 46, 110 
Nautilus, 5, 10, 35, 36, 64, 70, 
88, 110, LI, 119, 127, 132, 141, 
xxi, 
Nautilus pompilius, i. 
