779 



Proto. 



%/y 



Pal. Ohio, Vol. 2, 1875, page 420, plate 51, fig. 1 (omitted) nat- 

 ural size drawing of the lower part of the one single specimen 

 of this fine fern found near the base of the Coal measures at 

 Rushville, Perry Co., Ohio; fig. 2, the top of the frond; 2 a, 

 the nervation. — XIl-XIII. 



Protocaris marshi. Walcott, Bulletin No. 10, U. S. G. S., 



page 50, 

 platelO, 



fig. 1; 



Bulle- 

 tin No. 

 30, page 

 148, pi. 

 15, same 

 figure 1, 

 of type 

 speci- 

 men, 

 drawn 



I'll i ,i ••'', i 



te'Ay 1', '"' ', ' . r%> 



twice 



the size of nature ; flattened by pressure. Looks like the 

 primeval ancestor of all phyllopod crustaceans. Parker's 

 quarry, Georgia, Vt. ; Lower Cambrian, L. C 



Protocyathus rarus. See Ethmophylluin rarum. Z. C 



Protolimulus eriensis, Packard. [Prestwichia eriensis^ 



Hnl/M:viLduw, 



