Arch. 36 



Archaeopteris (Noeggerathia) obtusa (Lesquereux, in 



Geology of Pennsylvania, 1858, page 854, plate 1, fig. 11, and 

 Coal Flora, Report P, 1880, page 301, plate 49, figs. 6, 7.) 

 OoUett's Indiana of 1883, page 71, plate 9, fig. 4, YIII-IX, 

 Chemung Catskill (Montrose sandstone) formation. The figure 

 shows only the end of one feather of the magnificent leaf found 

 at Montrose, (see a part of it represented in Dana's Manual, 

 fig. 557 A.) The Archiopteris obtusa in Geol. Sur. Canada, 

 Fossil plate XVI, fig. 188, is said by Lesquereux to look like 

 Cyclopteris, 



Archceopteris stricta. See Archaeopteris minor, XL 

 Archimedes. See Owens' figure, 1852, under Retepora 

 archimedes. Keokuk Limestone. X/. 



Archimedes lana (Hall, 1857, Proc. Am. Asso. Adv. 



Science, Vol. 

 1 , Kaskas- 

 k ia lime- 

 stone). Col- 

 lett's Indiana 

 Report of 

 18 81, page 

 361, plate 41, 



fig. 7; only the axis partly preserved; the frond destroyed; 

 but the first row of little windows (fenestrules) appear on the 

 edge of the spiral. (Natural size.) Mauch Chunk (Sub- 

 Carboniferous, Kaskaskia limestone) formation. XL 



Archimedes ? Specimens (000, 1888) 9664, 9665, 9666, 

 9667 (ten pieces) in Randall's collections, Division S. Che- 

 mung shales. — VLLI g. 



