INDEX 453 



Leanchoilia — Continued. page 



supcrlata Walcott, new species described 170 



figured, pi. 31, fig. 6 * • • 222 



appendages of 171 



stratigraphic position and association I53 



Icblanci, see Olcnoidcs. 

 Leith, see Van Hise. 



Leperditia armata, from Aylmer sandstone, named and di'^cussed 253 



sp. ?, from Aylmer sandstone, named and discussed 253 



Lepidurus, compared with Burgessia 165 



carapace of, compared with Burgessia bclla 179 



compared with MarrcUa splciidciis 192 



glaciglis, referred to 176 



Lepidtirus-like carapace of Burgessia. mentioned 162 



Icptccnaruni, see Saukia. 



Leptostraca. relations of, to Branchiopoda, Malacostraca, Triloliila, and 



Merostomata 163 



Lett, R. C. W., photographs by, text figs. 11, 12 .330, 33i 



leucosia, see Saukia. 



Levisia Walcott, new genus described 86 



genotype, Agraulos agcnor Walcott 86 



adrastia (Walcott), characterized 86 



{^Mcnocephalus adrastia Walcott), present and former ge- 

 neric reference 71 



agenor (Walcott) (:= Agraulos agcnor Walcott), present and for- 

 mer generic reference /O 



figured, pi. 15, fig. 7 '**4 



genotype of Levisia 86 



listed, Cambrian faunas of China 73 



old species made type of new genus 72 



nasuta Walcott, new species described 87 



figured, pi. 17, fig. 5 i<>8 



text figs. 7, ya 87 



associated with Levisia richardsoni 87 



listed, Cambrian faunas of China 73 



richardsoni Walcott, new species described 86 



figured, pi. 17, figs. 4, 4a 108 



associated with Levisia nasuta 87 



listed, Cambrian faunas of China 73 



Liau-tung, province of, collection from, by Iddings 69 



new material from 69 



liches, see Pterocephalus. 



limbata, see Coosia. 



limbatum, see Anomocare and Coosia. 



limbatus, see Dikelocephalus. 



Limulava Walcott, new sul)order described and classified 20, 21 



classification of 1 55 



compared with Eurypterida (table) 20 



Eurypterida and Xiphosura 22 



