482 INDEX 



Ptychoparia — Continued. page 

 (Liostracus) tutia Walcott (= Anomocarella tutia (Walcott)), for- 

 mer and present generic reference 72 



(Proampyx) burea Walcott {— Proampyx burea (Walcott)), for- 

 mer and present generic reference 72 



punctata, see Lingulella. 

 pyrcne, see Saukia. 



quadratus, see Illcsnurus. 



Quandary Peak, Colorado, locality (20b) of Saukia coloradocnsis 277 



Quebec, Upper Cambrian locality 220b 261-300 



Rami, caudal 158, IS9 



f ureal 166 



randomensis, see Lingulella. 



Reads Landing, Minnesota, Upper Cambrian locality 97 37i 



Rearguard, changed to lyatunga (black rock) Mountain 331 



Red-colored deposits, climatic significance of 6 



Redlichia Cossmann (=^Hoeferia Redlich), present and former generic 



reference 71 



chinensis zone of Indo-China, Amiella sp. from 28 



regalis, see Opabinia. 

 regnlaris, see Agraulos and Inouyia. 

 reticulatus, see Olenellus. 

 retifera, see Tuzoia. 



Rhizostomse, order named 55 



Richardson, J., species named in recognition of 86 



richardsoni, see Levisia. 



richmondensis, see Ptychoparia. 



Richthofen, Baron F. von, bibliographic reference 15 



Cambrian trilobites collected by 69 



cited on pre-Olenellus zone strata 2 



richthofem, see Dorypyge and Stephanocarc. 



Robson district, comparative stratigraphic section. . : 343 



summary, stratigraphic section 341 



Robson formation, summary, stratigraphic section 341 



Robson Glacier, changed to Hunga (chief) Glacier 331 



Robson limestones, new formation name 334 



in stratigraphic section ZZ^ 



Robson massif, panoramic views, pi. 58, figs, i, 2 340-341 



Robson Peak (= Mount Robson), British Columbia 331 



illustrated, pi. 57, %• i 338-339 



pi. 58, f^gs. I, 2 .340-341 



from photograph by R. C. W. Lett, text fig. 12 331 



location described .' 328 



Mahto formation, Lower Cambrian locality 6ik 311-326 



Robson Peak district, British Columbia .and Alberta, Canada, Cambrian 



formation of 327 



stratigraphic section, Ordovician system 2)2^ 



Cambrian system 227 



