26 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxix. 



The stratigraphic range of the species is from the lower to the cen- 

 tral portions of the Man To formation. 



Formation and locality. — Lower Cambrian. Man To formation. 

 Bluish-gray shaly and thin-bedded limestone, south slope of Man To 

 Shan at Chang Hsia and 2 miles south, Shangtung, China. 



Collected by Eliot Blackwelder, of the Carnegie Institution of 

 Washington Expedition to China. 



REDLICHIA FINALIS, new species. 



This species is represented by one imperfect head, several free 

 cheeks, and several long spines similar to those occurring with 

 B. chinensis., which were probabl}^ attached to a segment of the 

 thorax as in Zacanthoidex typicalh Walcott." The fragment of the 

 head indicates an almost cylindrical glabella and elongate eye lobe; 

 the free cheek indicates a shorter anterior lixed cheek than that of 

 B,. nobUix. The material representing this species is imperfect, but 

 the fact that it occurs near the top of the Chang Hsia limestone, 1,000 

 or more feet above B. chinenxis and R. nohlUx^ in a strongly marked 

 Middle Cambrian fauna, makes it desirable to give the form a specific 

 name. It prol)al)l3'^ apprc^aches the t3'pe of the genus R. noetUngl 

 from India more closely than the other two species from China. 



Formation and locality. — Middle Cambrian. Lower portion of 

 Ku San formation. Shaly limestone. Two miles south-southeast of 

 Kao Chia Pu, Shangtung, China. 



REDLICHIA NOBILIS, new species. 



This species is closel}' related to Redlichla noetlinyl; it differs in 

 the form of the postei'ior segment of the glabella and the somewhat 

 less cylindrical form of the glabella. 



From RecUichia chinensis it differs in its less tapering glabella and 

 shorter anterior fixed cheeks. 



As far as known, it occurs only in the lower portion of the Man To 

 formation. 



Formation and locality. — Lower Cambrian. Man To formation, 

 in a hard bluish-gray limestone. Southeast slope of Hu Lu Shan, 2^ 

 miles south of Yen Chuang, Hsin Tai, Shangtung, China. 



REDLICHIA, species undetermined. 



A large free cheek and two thoracic spines, much like those found 

 with R. c/iinensls, are all that is known of this species. The angle 

 of divergence of the lateral spine is much greater than in other species, 

 and the stratigraphic horizon is higher in the section. 



"Bull. U. S. Geol. Surv., No. 30, 1886, pi. x.xv, fig. 2. 



