PALEONTOLOGY. 395 



field, and also a few rods south of the county jail in Greenfield, dose by the stage 

 road, and on the road to Bernardstou, a mile north of the village of Greenfield. 



The vegetable matter in these remains is wholly replaced by sandstone. By 

 breaking the specimens transversely a curious structure is revealed. It may be 

 described by saying that the cylinder is made up of convex layers of sandstone piled 

 upon one another; and I observe that in the same rock all the specimens have the 

 convex sides of these layers in the same direction, so that on one side of the rock 

 you will see numerous button-like protuberances and on the other side correspond- 

 ing concavities. (No. 258.) But I do not know which side is uppermost in the rock, 

 in sitir.' 



I allow the above to stand, although the forms lunv seem to me to be 

 tubular ferruginous concretions, the result of the circulation of iron-bearing 

 solutions in the sands. After forming- the concretions the solutions have 

 gone on to cement the intervening sand into a red sandstone. 



Of the other figures presented in the Geology of Massachusetts in 1841 

 as plants, fig. 89, p. 451; fig. 91, p. 453; figs. 92 and 93, p. 454; and figs. 

 3 and 5 on pi. 28 (cited as 29 in the text) are dubious impressions, which 

 are very common in the sandstones. Some may have been caused by 

 fucoids ; others, as fig. 3, by the dragging of the roots or branches of float- 

 ing trees rising and sinking with the waves. Fig. 94, p. 454, represents 

 ferruginous concretions ; fig. 1, pi. 28, is a track. For fig. 92, the name 

 Fucoides connecticutensis is suggested on p. 453. 



Clathropteris platvphylla Brongn. 



1841. "Peculiar vegetable relic," like a fern. E. Hitchcock, Geol. Mass., p. 452, 

 tig. 90. Teste, E. Hitchcock, .jr. 



1854. C. rectiuscuhiH. Pj. Hitchcock, jr. Description of a new species of Clathrop- 

 teris, discovered in the Connecticut Valley sandstone. Am. Jour. Sci., 2d 

 series, XX, p. 22 ; figured in the text. 



1858. C. rectiusculus. E.Hitchcock. Ichnology of Massachusetts. PI. V, fig. 1; 

 PI. VII, fig. 1. 



1890. G. platyphi/lla Brongn. J. C. Newberry, Fossil Fishes and Fossil Plants of 

 the Triassic Eocks of New Jersey and the Connecticut Valley: Mon. 

 U. S. Geol. Survey, Vol. XIV, p. 94, PI. XXII. 



Localiti/: Bassett's quarry, on the west face of ]\Iount Tom, in East- 

 hampton, just below the Holyoke trap sheet, in coarse, buft' arkose. The 

 type specimen is in the museum of Williston Seminary, at Easthampton. 

 A large series in the Amherst College cabinet, where are also specimens 

 from the quarry of Roswell Field, in Gill; also from the banks of the 



' E. Hitchcock, Geol. Mass., 1841, p. 456. 



