478 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



PAGE 



Olenelhts reiiculatus Peach 335. pl- 39- figs. 9-13 



Peach, in synonym}' 335 



compared with Olenellus canadensis 336 



Olenellus ? gigas 323 



Olenellus lapzvorthi 332, 335, 336 



mentioned ' 248, 314, 342 



stratigraphic distribution tabulated 251 



Olenellus thompsoni (Hall) . .336, pl. 34, fig- 9, pl- 35, figs- 1-7; and pl. 44, fig- 9 



Billings, in synonymy 305, 337 



Cole, in synonymy 33° 



Ford, in synonymy 337 



Freeh, in synonymy 338 



Hall, in synonymy • 336, 337 



Lesley, in synonymy 337 



Lindstrom, in synonymy 338 



Moberg, in synonymy '. 264, 338 



Weller, in synonymy 305 



Whitfield, in synonymy 305, 337 



compared with Mesonacis vermontana 338 



Olenellus canadensis 3i7, 3i8 



Olenellus claytoni 3I9 



Olenellus fremonti 322, 339 



Olenellus gilberfi 329, 339 



Olenellus lapzvorthi 33^ 



Pcedeumias transitans 306, 307, 3o8, 338, 339 



Wanneria walcoftanus 303 



facial sutures not present in 242 



formation of telson. 234, 266 



geographic distribution of 252 



mentioned 245, 248, 256, 312, 314, 327, 338 



Pcedeumias first placed as variety of 304 



stages passed through in development 234 



stratigraphic distribution tabulated 251 



telson of, compared with posterior portion of Mesonacis vermon- 

 tana 233, 266 



Olenellus thompsoni crassimarginatus, new variety 340, pl. 35, figs. 8-10 



compared with IVanncria zvalcottanus 303 



mentioned 248 



stratigraphic distribution tabulated 251 



Olenellus vermontana Billings, in synonymy 265 



Ford, in synonymy 265 



Hall, in synonymy 264, 265 



Holm, in synonymy 266 



Whitfield, in synonymy 265, 305 



Olenellus zvalcotti (Shaler and Foerste) 341, pl. 24, fig. 11 



Grabau, in synonymy 341 



Walcott, in .synonymy 341 



associated fossils listed 341 



