INDEX 
333 
scalaris, 112, 241. 
scaldiana, 253. 
scaldianum, 253. 
Scarabus, 189. 
scaturiginum, 207. 
Scutibranchiata, 9, 41. 
Scutifera, 74, 75. 
scutulum, 55, 56. 
secale, 165, 166. 
Segmentina, 198, 244, 245, 246. 
Seiiiinulum, 140. 
Sepia, 2. 
septemdentata, 172. 
Seraphia, 1 90. 
sericea, 134, 135, 136. 
Serpula, 104, 105. 
serpuloides, 37. 
sexdentata, 161, 171, 172. 
sexdentatus, 170, 171, 172. 
Shell, formation of the, 4. 
Sheppardi, 243, 240. 
siculus, 203. 
simile, 27. 
similis, 27, 28, 171, 184, 187, 233, 
simplex, 219, 
sinuata, 277. 
sinuatum, 269. 
sinuatus, 222, 277. 
sinuosa, 272. 
sinuosus, 220, 222. 
Siphonaria, 217. 
Siphonophora, 247. 
Skenea, 37. 
solennis, 203. 
solida, 280. 
Somershamensis, 235. 
Sowerbii, 83, 84. 
speciosus, 207. 
sphasrica, 26. 
Sphcerium, 252, 253, 254, 255, 257. 
Sphyradium, 168, 169. 
spinulosa, 139. 
spirorbis, 36, 231, 235, 243, 
spirula, 144. 
splendidula, 155. 
stagnale, 206. 
stagnalis, 64, 65, 197, 202, 206, 208, 
210, 228, 272. 
Stagnicola, 206, 208, 211. 
stagnicola, 253, 257. 
stagnorum, 28. 
Stenopus, 90, 
Stomodonta, 162, 164, 166, 168, 
169, 170, 172, 176, 185. 
Streptaxis, 53. 
striata, 123, 124, 127, 268. 
striatula, 95. 
striatulus, 96, 
striatus, 19, 220. 
strigata, 121, 123. 
striolata, 133, 208. 
Strombi, 160. 
Strombiformis, 186. 
Styloides, 155, 158, 159. 
subalbida, 125, 
subcylindrica, 155. 
subcylindricus, 155. 
subfuscus, 69, 71. 
subglobosa, 109. 
Submytilacea, 249. 
subopaca, 227. 
subponderosa, 273. 
subrufescens, 132. 
Subsilentia, 2. 
substriata, 171. 
subulatus, 211. 
subviridis, 139. 
succinea, 147. 
Succinea, 64, 66, 73, 74, 96, 101, 
145, 146, 147, 148. 
succineus, 67, 147. 
succino colore, 80. 
sulcata, 272. 
sylvatica, 108. 
sylvaticus, 81. 
Symphonota, 272. 
Syncera, 23. 
Tachea, 103, 106, 108. 
Tachychlamys, 96. 
Tandonianum, 267. 
Tapada, 147, 148. 
Teba, 99, 121, 123, 124, 129^ 130, 
132, 134, 136, 139. 
Tellina, 252, 253, 257, 264, 267j 268. 
tenella, 193. 
tenellus, 83, 242, 
tenera, 91. 
tentaculata, 26. 
tentaculatus, 26. 
tenuis, 96. 
terebra, 119, 240, 241. 
tergestina, 123, 
terrestre, 158, 
