492 INDEX 



PAGE 



Tatay formation, comparative stratigraphic sections 343 



Tatay limestones, in stratigraphic section 338 



new formation name 334 



tatian, see Anomocare and Anomocarella. 



Teinistion Monke {^Dorypygella Walcott), present and former generic 



reference 71 



alcon (Walcott) (■= Dorypygella alcon Walcott), present and for- 

 mer generic reference 71 



typicalis (Walcott) (^= Dorypygella typicalis Walcott), present 



and former generic reference 71 



Teller, Edgar E., acknowledgments to 347 



Tellinomya f hamburgensis Walcott, listed from locality 201a 359 



tellus, see Lonchocephalus and Ptychoparia. 



Telson as an abdominal segment 158 



tenes, see Anomocarella and Ptychoparia. 

 tenuis, see Ottoia and Yohoia. 

 tenuisculpta, see Calvinella. 



Tertiary section. Upper Kanab Valley, Utah 8 



Tertiary terrestrial non-marine sediments 6 



texanus, see Crepicephahis and Dikelocephalus. 



Texas, Dikelocephalus in 359 



Saukia cf. coloradoensis, fragments from 378 



Saukia fallax from Upper Cambrian locality 70a 361, 378 



Upper Cambrian locality 70a near Burnet 359, 372 



Text figures, listed, "Middle Cambrian Holothurians and Medusae".... 42 



See Illustrations. 



Thamnocephalinse Packard, compared with Opabinidse 166 



Thamnocephalus, leg of, compared with Opabinia 168 



platyurus Packard,, compared with Opabinia regalis 165, 169 



thea, see Pagodia. 

 theano, see Ptychoparia. 



Theoretical lines of descent of Cambrian Crustacea, table 161 



Theresa formation, included by Miller in Potsdam sandstone 255 



" The Sardinian Cambrian genus Olenopsis in America " 239 



thisbe, see Inouyia. 

 thompsoni, see Olenellus. 



Thoracic appendages, discussed 159 



Thoracic segments, discussed 159 



fhraso, see Anomocarella and Ptychoparia (Liostracus). 

 titiana, see Inouyia and Ptychoparia. 



Titkana formation, comparative stratigraphic sections 343 



summary, stratigraphic section 341 



Titkana limestones, in stratigraphic section 2)27 



new formation name 334 



Titkana Mountain, Robson Peak district, locality described 329 



illustrated, pi. 57, fig. : 338-339 



Titkana (bird) Peak=: Ptarmigan Peak 331, 332 



illustrated, pi. 58, fig. i 340-341 



Tokana Mountains, Robson Peak district, locality described 329 



illustrated, text fig. 11 330 



