CAMBRIAN GEOLOGY AND PALEONTOLOGY 



II 



No. II.— NEW LOWER CA^IBRIAN SUBFAUNA 



By CHARLES D. WALCOTT 



(With Plates 50 to 54) 



CONTENTS p:^GE 



Introduction 309 



Description of species 310 



Mickisjitzia muralciisis, new species (pi. 50, rtgs. 10, 11; pi. 51, tigs. 



1-6; pi. 52, fig. I) 310 



Lillian! ell a chapa, new species ( pi. 50, figs. 4-g) 311 



LbigitlcUa Iiitka. new species (pi. 50. figs. 1-3) 312 



Obolella uiida. new species ( pi. 52, figs, yj) 312 



Obolella cf. cliromatica Billings ( pi. 52, fig. 2) 313 



Holniia ? macer, new species (pi. 54, fig. i) 313 



JJ'aniicria occidens, new species (pi. 53, fig. 2) 314 



Callavia eucharis, new species (pi. 53, fig. i ) 315 



Callaz'ia perfect a, new species ( pi. 53, figs. 3-5) 315 



Olenellus tniciiiani. new species (pi. 54, figs. 2-10) 316 



ILLUSTRATIONS 



PL.\TES 



P.\(,E 



50. Liiigiilclla Iiitka, Lingulclla chapa, and Mickzi'itzia muralciisis 318 



51. Mickwitzia muralensis 320 



52. Mickwitzia muralensis, Obolella cf. cliromatica, and Obolella inida. .. . 2--^ 



53. Callavia eucharis, Wanneria occidens. and Callaiia pcrfccta 324 



54. Hohnia ? macer and Olenelhis trucmani 326 



INTRODUCTION 



During the season of 1912. while making- a reconnoissance of a 

 portion of the Robson Peak District north of the Peak I found a block 

 of (lark siliceous sh.ale on the surface of Mural Glacier that contained 

 a fine species of Olcnellus and numerous specimens of a species of 

 Mickivitzia and Lingulclla. The source from which the block came 

 was found in a cliff two miles up the glacier at the foot of Mumm 



Smithsonian Miscellaneous Collections, Vol. 57, No. 11. 



309 



