Plant. 



654 



earliest times, and not in plant (or fixed) but in floating (or 

 seaweed) forms; such as those imprinted on the primal red 

 sandstone strata of Lake Superior (see Owen's medal-ruled 

 figures on plate 1, in Geol. Wise, Iowa and Minn., 1852) ; and 

 such as those given by Hall, and all Palaeontologists in a 

 great number of figures ; many of which, however, have been 

 justly suspected of being the tracks, burrows, or food casts of 

 worms, trilobites and shell fish. 



Plant impressions, of Cambrian ? age, found by Owen in the 



very ancient rocks ot 

 ^ .^HMi^b. the north-west shore 



of Lake Superior. 

 Geology of Wiscon-\ 

 sin, Iowa and Min- 

 nesota, 1852, plate 

 1, fig. 3, on a slab 

 of red sandstone. It 

 is the fashion just 

 now to consider all 

 such very ancient 

 fossil forms to be 

 tracks or burrows 

 of worms, trilobites, 

 shell fish, etc. 



Plants of unknown age, in the Peach Bottora rooiing slates 

 of York Co., Pa., of unknown age, perhaps Cambrian, see 

 Buthotrephis Uexuosa. 



Plants, in Trenton limestone very obscure. Specimens 210- 

 145, 210-151, from Bellefonte, Centre Go.—IIc. 



Plants, in sandstone beds at the bottom of the Middle 

 Medina (red) in Blair Co., Pa., vertical stems, obscure. [Per- 

 haps Scolithus. worm burrows.] T, 48. — lY h. 



Plants, in Clinton red shale^ very obscure. Specimens 

 508-7,"-10, -21 (two),^-25, -30, from Huntingdon Go — Va. 



