DESCRIPTION OF GENERA AND SPECIES. 105 



south of Ch'ang-hia; also (C27), buff and drab shales in the lower part of the 

 Man-t'o shale [Blackwelder, 19070, p. 26, third paragraph; and fig. 6 (bed 7), p. 

 25], on crest of ridge at Ch'ang-hia, Shan-tung, China. 



Collected by Eliot Blackwelder. 



Dr. H. Mansuy reports this species from southern China, near Yunnan-Fu, 

 province of Yunnan. 



Redlichia ? finalis Walcott. 



Plate 7, Figures 13, i^a-b. 



Redlichia finalis WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 26. (Discussed as a new species 

 essentially as below.) 



This species is represented by one imperfect cephalon, several free cheeks, 

 and several long spines similar to those occurring with R. chinensis [p. 104], which 

 were probably attached to a segment of the thorax as in Zacanthoides typicalis 

 (Walcott) [1886, plate 25, fig. 2]. The fragment of the cephalon indicates an almost 

 cylindrical glabella and elongate eye-lobe; the free cheek indicates a shorter ante- 

 rior fixed cheek than that of R. nobilis. The material representing this species 

 is imperfect, but the fact that it occurs near the top of the Ch'ang-hia limestone, 

 i ,000 or more feet above R. chinensis and R. nobilis, in a strongly marked Middle 

 Cambrian fauna, makes it desirable to give the form a specific name. It appears 

 to be nearer the type of the genus R. noetlingi Redlich [1901, p. 3] from India than 

 the other two species from China. 



Formation and Locality. Middle Cambrian: (C58) Green shale near the 

 middle of the Ch'ang-hia limestone, at top of hill 2 miles (3.2 km.) south-southeast 

 of Kao-kia-p'u, Shan-tung, China. 



Collected by Eliot Blackwelder. 



Redlichia nobilis Walcott. 

 Plate 7, Figures 12, iza-e. 



Redlichia nobilis WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 26. (Discussed as a new species 

 essentially as below.) 



This species is closely related to Redlichia noetlingi Redlich [1901, p. 3]; it 

 differs in the form of the posterior segment of the glabella and the somewhat less 

 cylindrical form of the glabella. 



From Redlichia chinensis [p. 104] 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-t'o formation. 



Formation and Locality. Lower Cambrian: (('?>) Lower part of the Man-t'o 

 shale formation [Blackwelder, 19070, p. 28 (list of fossils at bottom of page), and 

 fig. 8a (beci 20), p. 28], on the southeast slope of Hu-lu-shan, 2.5 miles (4 km.) 

 southwest of Yen-chuang, Sin-t'ai district, Shan-tung, China. 



Collecte J bv Eliot Blackwelder. 



Redlichia sp. undt. (a) Walcott. 



Plate 7, Figure 14. 

 Redlichia sp. utidi v A.LCOTT, 1905, Proc. U.S. Nat. Mus., vol. xxix, p. 26. (Species discussed as below.) 



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

 chinensis [p. 104] 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. 



