294 PROCEEDINGS OP THE ACADEMY OF [1880. 



modern rainprints made in mud, and their great similarity noticed. 

 One specimen of a fucoid found liere has apparently been so con- 

 fused and distorted by the beating of a heavy rain-storm that its 

 structure can scarcely be recognized. 



Fucoids of somewhat similar apjjearance have been described 

 from more ancient geological horizons, but not, so far as can be 

 learned, from the Trias. The occurrence of a plant which has the 

 characters of marine algae in a formation supposed to have been 

 deposited by fresh water is interesting. 



Postscript. — Since the above paper was presented, a photograph 

 of this fossil has been sent to Mr. Leo Lesquereux, the distin- 

 guished paleobotanist, who, in a letter to the writer, says : " Your 

 plate represents what I consider a new species of Palseo2:>hycus, 

 whose analogy is with P. (species undetermined) Hall, Paleont. 

 of N. Y., vol. i, PI. 70 (Hudson River group); also distantly 

 related to Fucoides auriformis and especially F. heterophyllus, 

 same author, 1. c, ii, PI. .3, figs. 3, 4. You may also find a kind 

 of analogy to what Hall considers and figures as roots or also as 

 stems of some marine plants, same vol., PI. 8, figs. 4, 5, and pi. 9, 

 fig. 4, and also pi. 10, figs. 5, 7 (all Clinton plants). The type is 

 evidently old, rather Devonian, even upper Silurian. European 

 authors have nothing like this from the Trias, Jurassic, Cretaceous 

 or Eocene." • 



