226 INVERTEBRATE PALAEONTOLOGY 



Trivia, 206 

 Trochocyathus, 178 

 Trochus, 147, 206 

 Tschaikowsky, 117 

 Tubipora, 160 

 Tuff, 26 

 Tumuli, IT 

 Turbinidae, 80 

 Turbinolia, 199 

 Turbonilla, 200 

 Turrilepas, 153 

 Turrilites, 193 

 Turns, 207 



Turritella, 33, 191, 206 

 Typhis, 207 



UintacrinuSj 180 

 Uncitidae, 166 

 C7mo, 1 88, 204 

 Unionidae, 84 

 Uriconian, 120 



Vandalism, 25 

 Vein-minerals^ 44 

 VentriculiteSi 177 

 F0ws, 205 

 Vermicularia, 169 

 Vinella, 140 

 Vivipara, 191, 206 

 Volcanic rocks, 26 

 Volutilithes, 207 



Walrus and Carpenter, 23 

 Wardour, Vale of, 194 

 Waves, 1 6 

 Weald-clay, 27 

 Wealden, 16, 175 

 Weathering, 20, 24, 61 

 Wenlock Limestone, 30, 31 



Shale, 27 

 Weo Edge, 79 

 West Knowle, 79 

 Whitby, 37 

 Whitecliff Bay, 33 

 Wight, Isle of, 27, 33 

 Wilsonia, 143 

 Woodocrinust 162 

 Worms, 47 

 Worm-tracks, 49 

 Wright, 70 



Xanthopsis, 208 

 Xenophora, 206 



Yorkshire, 32, 36 



Zaphrentidae, 159 

 Zeilleria, 186 

 Zoantharia, 129 

 Zonal indices, 76, 77 

 Zones, 73, 76 

 Zygospira, 143 



