CA MBRIA N FA UNA S V CHINA — WA L CO TT. 2 5 



(>i'i(j'n}(il (Itxi-ripiUni hv Doctor Redlicli: "The head shield i.s almost 

 semicircular, slightly elevated, possesses movable cheeks and two long- 

 cheek-spines. The glabella is cylindrical, slight!}^ contracted toward 

 the middle, provided on each side with four lateral furrows. The 

 palpebral lobes, which surround the glal)ella in one continuous curve, 

 are completelv separate from it and not continent as in Olencllus. 

 The facial sutures are well developed in all the specimens and, in con- 

 sequence of this, free cheeks are present. 



"The suture begins in the tirst quarter of the external margin 

 (reckoned from the glabella), extends along the eyes, and toward the 

 posterior margin is again directed outward. The fixed cheeks are 

 very narrow, whilst the free cheeks, which are provided witii long 

 cheek-spines, are almost double the width. 



"Of the thorax only isolated segments are preserved. The axial 

 part is elevated; the pleura? are grooved {' ph'fres a Nillon^ of Bar- 

 rande), and end in a hackwardly directed spine. 



"On the glabella the surface of the test shows tine backwardly 

 directed ridges, which are, however, so tine that the}' are visible oidy 

 under the lens. On the thickened margin the}' are also present, but 

 so uuich stronger that they can easily be shown in the figure. The 

 cheeks, even when highly magnified, show nothing of the sort, but at 

 most a tine punctation, which, however, is mainly due to the structure 

 of the test.'' 



Doctor Redlich compares this form with the genera Pi-otoleiuis^ 

 Paradoxides^ and 3[datoxldes, but does not note its close resemblance 

 to Zacantholde.s of the Middle Cambrian fauna of Nevada. 



In India the type species i?. noetUngi occurs near the sununit of 

 the Cambrian series of formations. In China M. oiohilis occurs near 

 the l)ase of the Man To formation, not far above the Archean complex. 

 /?. c/ihiens-i.s is found in the central portions of the Man To foi-nia- 

 tions, and R. final is occurs nearl}' 1,000 feet or more higher in the 

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

 indicates that RedUchla 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 Man To 

 formation is not distinctly Lower Cambrian. 



Genotype. — RedUclda noetlingl Redlich. 



REDLICHIA CHINENSIS, new species. 



This species differs from Redlichia noetlingl., the type of the genus 

 fi'om 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 nohilis it differs in having a proportionateh' less C3'lindrical 

 glabella and much larger anterior fixed cheeks. 



