INDEX 487 



Saukia — Continued. page 



wardi Walcott, new species described 384 



figured, pi. 69, figs, i, 2 410 



compared with Saukia fallax 378 



Saukia leucosia, S. pepinensis, and 6". lodcnsis 384 



formation and locality 385 



geographic distribution 375 



listed with description of genus 375 



occurrence of in Cambro-Ordovician limestones 362 



Scccvogyra Whitfield, compared with Mather ella 263 



Scenella varians, stratigraphic position and association 153 



Schizambon typicalis Walcott, listed from locality 201a 359 



Schizopoda, compared with Sidneyia inexpectans 25 



Schuchert, Charles, acknowledgments 384 



collection by mentioned 346 



schucherti, see Lingulella. 



Scolithus linearis Haldeman ?, listed from Potsdam-Hoyt fauna 254 



Scotland Station, Pennsylvania, Lower Ozarkian localities 5911 and 59 o. . 384 



Scotoplanes insignisfT\\&e\, compared with Louisella pedunculata 53 



sctdptilis, see Micromitra. 



Scyphomedusse, class named 55 



Section of phyllopod bed 152 



Sedimentation, pre-Cambrian marine 161 



seelyi, see Pagodia. 



Segmentation, table of cephalic, thoracic, and abdominal segments 158 



Selkirk Mountain Range, generic name derived from 120 



Selkirkia Walcott, new genus described 120 



genotype. Orthotheca major Walcott 120 



geographic distribution 120 



species referred to Selkirkia 120 



stratigraphic range 120 



Selkirkia fragilis Walcott, new species described 122 



figured, pi. 19, fig. 8 136 



compared with Selkirkia' gracilis and S. major 122 



fragilis Walcott, new species described 122 



. figured, pi. 19, fig. 9. : 136 



associated with Selkirkia major .' 122 



compared with Selkirkia fragilis and S, major 122 



stratigraphic position and association 153 



major (Walcott), described 120 



figured, pi. 19, fig. 6 136 



animal projecting from tube 121 



compared with Hyolithes carinatus Matthew; 121 



Selkirkia fragilis and S. gracilis 122 



dimensions 121 



in synonymy 120 



listed in stratigraphic section 2;^y 



stratigraphic position and association 153 



senaria, see Calymene. 

 septalis, see Obolus. 

 septem-notatus, see Protichnites. 



