228 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



the beds forming la of the Notch Peak limestone on Notch Peak, 

 found 2 miles (3.2 km.) south of Marjum Pass, House Range, Mil- 

 lard County, Utah. 



TSINANIA ELONGATA, new species 

 Plate 36, figs. 10, loa 



This species is founded on a small pygidium that is longer in 

 proportion to its width than described species. It has a length of 

 4 mm. and a width of 2.5 mm. in front of the small palpebral lobes. 

 The postero-lateral limbs are relatively large and a posterior occipital 

 ring is very faintly defined. The longitudinal outline of the cra- 

 nidium is nearly flat from its posterior margin to the anterior line of 

 the palpebral lobes, where its gentle curve increases so as to bring 

 the anterior margin far below the level of the palpebral lobes. 



This is a small species allied to Tsinania canens ^ from eastern 

 China. It is associated with Dikelocephalus ? dalyi Walcott," and is 

 supposed to be of Upper Cambrian age. Several undescribed species 

 that occur in Upper Cambrian formations of the Appalachian region 

 of southeastern North America are closely related to this species. 



The only associated species is Dikelocephalus dalyi Walcott.' 



Formation and locality. — Upper Cambrian: (3466) Limestone 

 nodules in calcareous shales in rock cut on Canadian Pacific Railway, 

 54.5 miles (87.2 km.) west of Field, and 2 miles (3.2 km.) west of 

 Donald Station, British Columbia, Canada. (R. A. Daly, 1912.) 



Type specimen in Victoria Memorial Museum, Ottawa, Canada. 



CONASAUGA FORMATION 



In the Coosa Valley and adjoining areas the shales and interbedded 

 limestones referred to the Conasauga formation include both Upper 

 and Middle Cambrian species. It is quite probable that a detailed 

 study of the formation will result in the separation of the dark shales 

 with the so-called " cobble " beds, and containing a Middle Cambrian 

 fauna, from the lighter colored shales and interbedded limestones. 

 When this is done the term Conasauga will be restricted to the Upper 

 Cambrian, and the Middle Cambrian beds will be given a formation 

 name. 



^ Research in China, Carnegie Inst, of Washington, Vol. 3, Pub. No. 54, 1913, 

 p. 222, pi. 23, fig. 3. 

 " Smithsonian Misc. Coll., Vol. 57, 1914, p. 367, pi. 64, figs, i, la, 2, 3, 4, 4a, 5. 

 ' Idem, p. 366. 



