Eosc. 



:^20 



Eoscorpius carbonarius. Meek and Worthen. A scor- 

 pion of the Coal measures 

 of Illinois, found in a no- 

 dule on Mazon Creek. Zit- 

 tel's Handbuch der Palae- 

 ontologie, 1885, Vol. 2, p. 

 ""SO, fig. 916, natural size. 

 Note. The earliest scor- 

 pions known came in with 

 the Lower Helderberg de- 

 posits, where we find the 

 earliest lobsters {Euryp- 

 teri.) The discovery was 

 made first in New York 

 (See Proscorpius os- 

 borni), and soon after- 

 wards in Scotland and 

 Sweden. — XIII, 



( Pleurotomaria concava. Hall, 

 Trans. Alb. Inst. Vol. 

 4, 1856. Name pre- 

 occupied and therefore 

 changed by Whitfield 

 " Bull.3, Am.Mus.,1882, 

 hid\__ I'S'Srf--^ '^-#:':>' /y. J^ p 1 a t e 9. Pleuroto- 



maria tenuimarginata, proposed by Miller in Cat. Am. Pal. 

 Foss., 1877, p. 245, and corrected on p. 301, second edition.) 

 Collett^s Indiana Rt. 1882, page 365, plate 32, figs. 21, 22,23, 

 side, bottom and section, enlarged twice.— Sper gen Hill, etc. 

 Subcarboniferous limestone, XI. 



Equisetibm stellifolium. See Annularia longifolia. XIII. 

 Bozoon canadense. (Dawson, Canadian Naturalist [2], 



Vol. 2, 1865; 



ZiCiur. .^B^^s^ r r. s 



_^^^ f:220. 



A.W/ri. 



Ziffel. Fig. 916. 



Eotrochus concavus. 

 X!. 



Since 



great 



when 

 conten- 

 tion whether it 

 be really a fos- 

 sil organic form 

 of life {rhizo- 

 pocLc&c); or a 



