156 
Sepia (Cuttlefish), 42, 89, 110, 
XXiv. 
Sepia officinalis, xxv. 
Sepia officinalis, Embryo, xxix. 
Sepioia atlantica : radula, ili. 
Septa, 63 
Septa tritonis, vi., x. 
Septaria, 58, 90, 103 
Septibranchia, 35 
Septifer, 134 
Septifer bilocularis, xxxii. 
Septum, 21 
Septum of Cephalopod Shell, 38 
Sexual dimorphism, 87 
Shell, 3, 1 
Shell, lime for, obtained from 
food, 6 
Shell, removal of portion, 5, 21 
Shell aperture, modes of closing, 
21-23 
Shell Money, 142 
Shell siphuncle, 39 
Shell topography, 19 
Shelly tubes of bivalves, 32 
Ship-worm. See Teredo, 
Sigavetus, 116 
Sigavetus haliotideus, x 
Sinistral Shells, 18 
“* Sinusigera,"’ 94 
'* Sinusigera Huxleyi,’’ xxvi. 
Siphon of Cephalopods, 36 
Siphons of bivalves, 27 
Siphonavia, 53, 103 
Siphonaria Kurrachensis, xxvi. 
Siphonariidz, 96 
Siphonostomatous Shells, 20 
Smavagdinella viridis, xii. 
Smell, 9 
Snail cultivation, 139 
Snail feasts, 139 
Solecurtus, 135 
Solen, 118 
Solenidz, 108 
Solenoconcha, 25 
Solenogastra, 15 
Solenomya, 119 
Solenomya togata, xvii. 
Spekia, 91 
Spherium, 53, 58, 92, 118 
THE LIFE OF THE MOLLUSCA 
Sphavium corneum, xviii. 
Spiral cleavage of Egg, 93 
Spivalis bulimoides, xxvi, 
Spivula, 39, 42, xxiv. 
Spivula Pevonit, xxv. 
Spirulivostva, xxiv. 
Spirulivostva Bellardii, xxv. 
Spondylidz, 48 
Spondylus, 63, 98, 133 
Spondylus princeps, xvii. 
Spondylus varius, 98, xxx. 
Spongiobranchia australis, 61, xxvi. 
Stenoglossa, 24 
Stenogyridz, go 
Stenopus, 135 
Stenotheca, 44 
Stenotvema hirsuta, xiii, 
Stilifer, 81 
Stilifer astevicola, xxvi. 
Stiliferina, 81 
Stomatia phymotis, ix. 
Strapavrollina, 45 
Streptaxis contusus, xiii, 
Streptoneura, 23, 87 
Sivombus, 22, 80, 97,104, 117, 124 
Stvombus auris-Diane, viii. 
Strombus gigas, 141 
Strombus Mauritianus, 134 
Strombus pugilis, x. 
Stvophites, 47 
Strophocheilus, go, 105 
Strophocheilus oblongus, xiii. 
Strophocheilus ovatus, xxx. 
Struthiolaria, viii, 
Stylifey, 118 
Stylifer brychius, 56 
Stylommatophora 25, 60 
Subemarginula rugosa, ix. 
Sub-Mytilacea, 58 
Subulites, 45 
Succinea 59, 79 
Succinea putris, xiii. 
Sums paid for Shells, 144 
Suture, 19 
Suture line, 39 
Swan Mussel. 
cygneed, 
Sycotypus, 69, 134 
Sycotypus pyrum, xxxii. 
See Anodonta 
