488 INDEX 



PAGE 



Sericite I5i 



Serpulites murchisoni Hall, listed from locality 113 360 



listed with St. Lawrence fauna 356 



serratus, see Neolenus. 



Sessile eyes, Burgessia and Marrella 159 



setigera, see Canadia. 



Shakopee formation, in provisional classification 354 



Shan-si, new material from 69 



Shan-tung, new material from 69 



shantungensis, see Acrotreta. 



Shantungia Lorenz (=Chuangia Walcott), former and present generic 



reference • 72 



Shantungia Walcott (—Shantungia Walcott), present and former ge- 

 neric reference 72 



buchruckeri Lorenz (=zChuangia nitida Walcott), former and 



present generic reference 7^ 



Sherbrooke formation, comparative stratigraphic sections 343 



summary, stratigraphic section 342 



summit of Upper Cambrian 229, 230 



Shio (grouse) Point, new name 2i2>Z 



Shota (smoke) Mountains, Robson Peak district, new name 334 



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



pi. 59, fig. 1 342-343 



"Shovel-head," common name given to Dikelocephalus (footnote) z^Z 



shumardi, see Conaspis. 



Sidneyia Walcott, new genus described 33 



characterized 158 



classification of I55 



compared with Amiella 27 



Strabops thacheri 20 



Trilobita 20 



genotype, Sidneyia inexpectans 23 



geographic distribution 23 



in synonymy 205 



labrum, or hypostoma of 158 



mentioned 148 



representing Merostomata 155, 163 



stratigraphic range 23 



and ^ miella, discussed 19 



inexpectans Walcott, new species- described _. . . 34 



figured, pi. 2, figs. 1-3 30 



pi. 3, figs., 1-4 33 



pi. 4, figs. 1-4 34 



pi. 5, figs. 1-3 36 



pl. 6, fig. 3 38 



pl. 7, fig- 1 40 



text fig. 10 306 



associated with Amiella ornata 27 



Peytoia nathorsti 57 



