104 RESEARCH IN CHINA. 



In India the type species Redlichia noetlingi [Redlich, 1901, p. 3] occurs near 

 the summit of the Cambrian series of formations. In China R. nobilis [p. 105] 

 occurs near the base of the Man-t'o formation, not far above the Archean complex. 

 Redlichia chinensis is found in the central portions of the Man-t'o formations. 



In my first preliminary paper on the Cambrian faunas of China 1 1 stated that : 



In China R. nobilis occurs near the base of the ManTo formation, not far 

 above the Archean complex. R. chinensis is found in the central portions of the 

 ManTo formations, and R. final-is occurs nearly i ,000 feet or more higher in the 

 section near the top of the Chang Hsia formation. This distribution indicates 

 that Redlichia is a Middle Cambrian genus; also that it may be in the upper portion 

 of the Lower Cambrian, but with our present information this is somewhat doubtful, 

 as the fauna of the ManTo formation is not directly Lower Cambrian. 



Recently Dr. H. Mansuy, a geologist of Indo-China, has discovered some 

 entire specimens of Redlichia chinensis near Yunnan-Fu, in Yunnan, associated 

 with undescribed trilobites that have a strong Lower Cambrian facies. This dis- 

 covery, taken in connection with the occurrence of the brachiopod genus Obolella, 

 and a gastropod genus Stenotheca represented by the species rugosa, leads me to 

 conclude that the Redlichia chinensis fauna is of late Lower Cambrian age, as given 

 in the table showing the association of genera and species in the Man-t'o formation 

 [Walcott, 19056, p. 6]. 



It is quite probable, from the character shown by the entire specimens of M. 

 Mansuy, that the specimens described as Redlichia finalis Walcott [idem, p. 26] 

 may belong to another genus. It differs from the typical forms of the genus R. 

 noetlingi and R. chinensis in having a strong nuchal spine, less tapering glabella, 

 and broader lobes between the eye and the glabella. 



I wish to call attention to the resemblance between the forms that have been 

 referred to Olenellus in Australia 2 by A. H. Foord and Redlichia. As far as can be 

 determined by the illustrations and a study of the specimens of the cephalon 

 illustrated by R. Etheridge, Jr., 3 there seems to be no escape from the conclusion 

 that the Australian form should be referred to the genus Redlichia. 



Redlichia chinensis Walcott. 



Plate 7, Figures n, iia-d; Plate 24, Figures i, ia. 



Redlichia chinensis WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 25. (Discussed as a new 

 species essentially as below.) 



This species differs from Redlichia noetlingi Redlich [1901, p. 3], the type of 

 the genus from India, in its more conical glabella and smaller anterior lobe of the 

 glabella ; otherwise the two forms are very much alike, as far as can be determined 

 by the present means of comparison. From Redlichia nobilis [p. 105] it differs in 

 having a proportionately less cylindrical glabella and much larger anterior fixed 

 cheeks. 



The stratigraphic range of the species is from the lower to the central portions 

 of the Man-t'o formation. 



Formation and Locality. Lower Cambrian: (('15 and C16) Slaty black lime- 

 stone in the lower part of the Man-t'o shale [Blackwelder, 19070, p. 26, third para- 

 graph; and fig. 6 (bed 7), p. 25], (CIS) at Ch'ang-hia, and (016) 2 miles (3.2 km.) 



'Proceedings U. S. Nat. Mus., vol. 29, 1905, p. 25. 



2 Geological Magazine, London, Decade 3, vol. 7, 1890, p. 99, plate 4, figs. 2, 20-6. 



transactions Royal Society of South Australia, vol. 29, 1905, p. 247, plate 25, fig. i. 



