NO. I CAMBRIAN FAUNAS OF EASTERN ASIA 43 



TSINANIA, new genus 



Cranidium subrhomboidal in outline ; moderately convex ; slight 

 traces of an occipital ring at base of glabella. Palpebral lobes just 

 back of the center of the cranidium, and of me4ium size. Postero- 

 lateral limbs subtriangular, short. Facial sutures curving inward so 

 as to give a rounded front to the cranidium. 



Surface smooth or minutely punctate. 



Associated pygidia of species referred to the genus a little broader 

 than long and with a slightly defined, narrow, long median lobe 

 marked by obscure transverse furrows that may be faintly outlined 

 on the broad lateral lobes. 



Genotype. — Illcenurus canens Walcott.^ 



Stratigraphic range. — Upper Cambrian of eastern China. Lower 

 portion of Ch'au-mi-tien limestone. Also Notch Peak formation, 

 western Utah. 



Geographic distribution. — Provinces of Shantung, China. West- 

 ern Utah in House Range of Cordilleran Province of western 

 America. 



Observations. — The genus Tsinania differs from Illcenurus Hall in 

 having the cranidium rounded in front by the incurving of the facial 

 sutures and short, postero-lateral limbs. The associated pygidia of 

 the three species from China are nearly as long as wide and quite 

 unlike the short, transverse pygidium of Illcenurus. From Symphy- 

 surus Goldfuss, it differs in its smaller palpebral lobes, rounded front 

 of the cranidium and the central portion of the cranidium, which is 

 well defined and expanded anteriorly in Symphysurus and obscure 

 and rounded inward in Tsinania. 



The species referred to the genus are : Tsinania canens (Walcott),'' 

 Tsinania ceres (Walcott),' Tsinania cleora ( \\^alcott),'' and Tsinania 

 dictys (Walcott).' 



PALEONTOLOGY 



STRATIGRAPHIC AND GEOGRAPHIC DISTRIBUTION 

 OF SPECIES 



The table gives the general stratigraphic and geographic distribu- 

 tion of the Chinese species described in this memoir. The asterisk 

 used opposite the species by authors to indicate the position of the 



^ Research in China, Carnegie Institution of Washington, Publication No. 54, 

 Vol. Ill, 1913, p. 222, pi. 23, fig. 3. 



^ Idem, pp. 222-224. 



^ lUcEuurus Walcott. Smithsonian Misc. Coll., Vol. 53, 1908, p. 175, la of 

 Notch Peak formation of the Upper Cambrian, House Range, Utah. 



