222 INDEX. 



Trinucleus, 200 Vermes, 98 



Trochus, 157 Voluta, 161 

 Turbo, 157 



Turrilites, 177 Waldheimia, 122 



Turritella, 158 Worms, 98 



Uncites, 119 Xanthopsis, 193 



Unio, 142 Xiphosura, 205 



Ventriculites, 34 Zaphrentis, 57 



Venus, 146 Zoantharia, 51 



CAMBRIDGE: PRINTED BY C. J. CLAY, M.A. * SONS, AT THE UNIVERSITY PRESS. 



