INDEX. 
PAGE 
Spiractinella Wrightii 
Sponge Beds ... Mi m L00 
Carboniferous ... 98, 99, 143, 
Upper Limestone (Ireland) 101-105 
Spongelia antiqua 147 
Sponges, Form of : 45-7 
= General Characters 4A, 45 
— Geological Distribution ... 97-104 
— Size of Re 48 
— Systematic Position 85 
Sponges, Jurassic, Description of Genera and 
Species 195-250 
— —  Generically Distinct from 
Paleozoic 254, 
— — Introduction 189 
= —— Stratigraphical, List of — 253 | 
Sponges, Paleozoic, General Features 94. 
Spongia 244. 
—  ecymosa 2138 
—  floriceps : 226 
—  helvelloides . 243, 244, 
—  inciso-lobata 114. | 
— _ pistilliformis 213 
Spongiz, Class 86 
Spongilla a ae 212 
_- purbeckensis 193, 212; XIII vi, via 
Spongillide, Family ... 212 
Spongitenkalk 254 | 
Spongites 233 
— astrophorus acid asf ov. 228 
— glomerata ... 227, 228 
= IaisiCUS! ssa: : . 2d 
= rotula, var. biretiformis : 234 
St. David’s 94 104, 112, 180 | 
Stare Cove 198, 213 
Stauroderma 190, 191, 194, 202, 216 
— explanatum 202; X,v, va 
= Lochense 202 
Staurodermide 90 
Steganodictyum Carteri 182 
= cornubieum 182 
Stegendea Ad .. 241 
Stemmann, Prof. G. 33, 30, 115, 226 
Stellispongia ... 226, 227 
— corallina 228 
— elomerata 228 
= semicinceta et eovallina 226 
165; VIII, i, ia-ih | 
263 
PAGE 
996 
Stratigraphical Distribution Tee Species 251, 
252, 253 
Stellispongia variabilis 
-— - Paleozoic Species 185 
Streitberg 202, 246, 247 
Stroud .. 214 
Sturminster Newton 192, 212 
Suess, Prof. E. 18, 162 
Suffield (Yorkshire) 193, 217, 218, 227, 228, 247 
Swaledale 99, 160 
Switzerland ; 194 
Sycones 92 
Tate, R. 17 
Taxoploca ; 207 
— ovata : ys 5 ANY 
Terrain a Polypiers . 241 
| 'Tetracladina, Family 88, 116 
— Spicules 72 
Tetractinellid Spicules ee od 
Tetractinellide . 87, 149, 208 
— Disposition of Spicules in 79 
= Jurassic, List of 251 
— Paleozoic, List of 185 
119, 126, 
Tetragonis 128 
—  Danbyi 126, 128 
Tetrasmila 245 
Textispongia . 198 
— foliata ... e; rr 199 
Thohasterella . 96, 99, 101, 184, 168 
—_ compacta 1%1; VII, i, tia 
crassa 171; VIII v, va, [X ii, iia, 
ub 
= eracilis 170; VILi, ia+ig 
= Youngi 169; VIL ii, iia- 
uf 
Thurmann, J., et Etallon, A. 14 
| Thurnau : ss 233 
| Tomes, R. F., 190, 194, 216, 218, 222, 233, 236, 
237, 239, 247 
Tragos 206, 243 
—  Binneyi 183 
—  semicirculare 183 
— ‘'Tunstallensis ess 
Trautschold, H. 19, 26, 29 
Tre Gall 112 
143, 145, 150, 152 
MM 
Trelogan 
