Udonellidae 334, 335, 337, 338, 476 Urocleidus mucronatus 242 



Udonellinae 335 Urocleidus sp. 351* 



Urocleidus 242, 249, 259—262, 264, 265, Vnllisia 65 251 3-^5 426—428 



268, 309, 310, 348 350, 351. 465 ^^Isla sUiaS 13 'fs* 



Urocleidus acer 460* Vallisinae 339, 445 



Ur. aculeatus 350 Vallisiopsis 428, 430 

 Ur. chaenobryttus 245 ^ 



Ur. dispar 245 Winkenthughesia 250, 426, 427 



Ur. ferox 242, 245 Winkenthughesia bramae 427* 



Ur. mimus 228, 229, 249 W. thyrsites 427 



Page numbers in this index refer to original Russian text pages shown in margins ol this English translation 



621 



