INDEX ■ _ 459 



PAGE 



Madison formation, in provisional classification 354 



Madison sandstone, listed with Upper Cambrian of Wisconsin 353 



magnificus, see Dikelocephalus. 



Mahto formation, comparative stratigraphic sections 343 



Alberta, Lower Cambrian locality 6ik 311-326 



summary, stratigraphic section 34i 



Mahto (grizzly-bear) Mountain, new name 333 



Robson Peak district, locality described 329 



illustrated, pis. 55 and 56 334, 336 



Mahto sandstones, in stratigraphic section • 339 



new formation name 335 



main, see Conokcphalina and Ptychoparia. 



major, see Orthothcca and Sclkirkia. 



Malacostraca, subclass 148, 153. 182 



classification of I54 



compared with Waptidae 180 



descent of 160-161 



foreshadowed by Burgess shale fauna 165 



relations of, to Branchiopoda, Leptostraca. Trilobita, and 



Merostomata 163 



» segmentcytion, table of 158 



mentioned 155 



Malacostracans, group of, exceptions in vertical range noted 155 



bivalve carapace of I57 



Maldanidae, Ocsia suggests I33 



maladensis, see Micromitra (Iphidclla) pannula. 



Manchuria, collections made by Dr. Iddings in 69 



niaiichuricnsis, see Bathyuriscus and Lingulella. 



Mandibles, Branchiopoda, and Malacostraca 159 



Mansuy, H., photographs received from. 19 



manticula, see Lingulella. 



manfoensis, see Ptychoparia. 



Man-t'o shale formation, Amiella sp. from 28 



marcia, see Lingulella. 



marica, see Saukia. 



Marr, John E., genus named in recognition of 192 



Marrclla Walcott, new genus discussed 192 



antennules (?) of 157 



carapace of 157 



classification of 154 



dorsal spines of 157 



foreshadowing the trilobite 163 



labrum of 158 



stratigraphic position and association 153 



swimming exopodites of 160 



splendens Walcott, new species described 193 



figured, pi. 25, figs. 1-6 210 



pi. 26, figs. 1-6 212 



appendages 193 



Apus-\\\<iQ. form of 162 



