INDEX 489 



Sidneyia — Continued. page 



inexpectans — Continued. 



compared with Beltina 21 



Calymene senaria 27 



Eurypterus 206 



Neolenus serratus 20, 27 



Pterygotus bilobus 206 



Schizopoda and Decapoda 25 



formation and locality 27 



highly organized merostome 165 



in synonymy and discussion of new specimens " 205 



Sidneyidse Walcott, new family, named and discussed 22 



classification of 155 



mentioned 19, 205 



" Siliceo-argillaceous dolomite," in St. Lawrence formation 355 



Silurian, connection with pre-Cambrian Algonkian 19 



Hymenocarina in 155 



mentioned 165 



Silurian seas, descendants of crustacean fauna in 153 



similis, see Lingulella. 

 simplex,- see Metoptoma and Wimanella. 



sinensis, see Calymene, Blackwelderia, Damesella, Dikeloccphahts and 

 Stephanocare. 



Sinuopea ? sp., Cambrian f acies questioned 255 



listed from Potsdam-Hoyt fauna 254 



Sipunculoidea, compared with Ottoia 128 



Siyeh limestone, thickness of 6 



Slate, chemical analysis of, by George Steiger 150 



Slave River, Robson Peak district, locality described : 329 



Smith, G. O., bibliographic references 16 



smithi, see Anomocarella. 



Smoky River, Robson Peak district, illustrated, pi. 57, fig. i 338-339 



valley, locality described 328, 329 



illustrated, pi. 59, fig. 2 342-343 



Snowbird Pass, Robson Peak district, illustrated, pi. 57, fig. 2 338-339 



Solenopleura abderus Walcott (= Menocephahis abderns (Walcott)), 



former and present generic reference 72 



acantha Walcott (^=Menocephalus acantha (Walcott)), former 



and present generic reference 72 



' ca'Ja/m Walcott {^= Menocephahis acidalia (Walcott)), former and 



present generic reference 72 



belus Walcott (= Conocephalina belus (Walcott)), former and 



present generic reference 72 



beroe, compared with Solenopleura chalcon 83 



chalcon Walcott, new species described 83 



figured, pi. 16, fig. S 106 



compared with Solenopleura beroe Walcott 83 



listed, Cambrian faunas of China y^ 



intermedia (Walcott) (^ Ptychoparia (Liostracus) intermedia 



Walcott), present and former generic reference. 72 



sp. undt., listed in stratigraphic section 336 



sorge, see Agraulos. 



