34 PROCEEDINGS OF WASHINGTON MEETING. 



we give below (figures 3 and 4), taken from Walcott's paper on the Olenellus fauna * 

 do not differ in any essential character from the figures given by Hall. 



In 1851 Professor H. Goeppert published a paper on the flora of the Transition 

 rocks,t in which he refers to Scolithus linearis as a plant under the name of Scoleco- 

 lithus linearis.X 



In the following year (1852) Professor James Hall described as a new species 

 Scolithus n rticalis, from the Medina sandstone.*! As noted above, he had mentioned 

 Fucoidcs verticalis from the Portage, and a comparison of the two forms fails to show 



' -„ 



J 



■ 



Figure 3 — Scolithus linearis, Haldemann. (After Figubb 4— Scolithus linearis, Haldemann. {After 



Walcott.) Waleott) 



r rii>- cast of ;i Bingle tube preserved in a coarse Tubes filled with sand of a darker color than 



sandstone. the matrix. 



any difference between them. He referred the form, without any question, to the 



vegetable kingdom. His description, which is meager, is as follows : 



" Plant composed of smooth round stems, which penetrate the strata vertically. This species is 

 smaller than the one in the Potsdam sandstone, though resembling it in its general characters." 



Our figure 5 is copied from that given by Professor Hall. There is scarcely any 

 feature except its geological position to distinguish it from S. linearis. 



In the same year (1852) we have the first reference of Scolithus linearis to the 

 animal instead of the vegetable kingdom. Logan, in a paper on foot-prints occur- 



*10th Ann. Rept. U. S. Geol. Survey. 1890, pi. 63. 

 fZeit-'-ln'. der Deutsche geol. Oesell., Bd. 3, 1851. 



J This paper is noticed by T. K. J[ones] in the Quart. Jour. Tieo!. Soc. London, vol. viii, part 2, 

 ] - >2, pp. 18-23. 

 £ Paleontology of X. V., vol. ii. 1852, p. 0, pi. 2 [misprinted iii in text], fig. 3. 



