

460 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 20, 



printed themselves in light-greenish stains on the red stone. The 

 Plants have been drifted, and are for the most part in fragments, the 

 smaller and more delicate of which occur in the upper part of the 

 bed, and those of larger size in its lower part. Above and below 

 the Plant-bearing bed are red sandstones, passing into the usual 

 red conglomerate. Though there are abundant exposures of the red 

 sandstone and conglomerate on the coast of Perry, I could not learn 

 that fossils have been found in any other locality than those above- 

 mentioned, so that their occurrence must be considered rare. In 

 the underlying Upper Silurian Series I could find no Plants, except 

 some obscure fragments of slender stems. 



With the assistance of Mr. Brown, I was enabled to obtain a num- 

 ber of specimens from the original Plant-bearing bed, the actual 

 exposure of which we indeed worked out. The more important of 

 these I shall now notice in detail. 



1. Coniferous wood (Dadoxylon et Aporoxylon). 



Among the most abundant fossils at Perry are fragments of stems 

 and roots, and strips of bark, belonging to two or more species of 

 coniferous trees. They are pyritized, so that their structures can be 

 made out only as opaque objects, or after treatment with nitric acid. 

 In the specimens formerly collected, I was able to observe only a porous 

 woody tissue (Aporoxylon). Some of my present specimens, how- 

 ever, show three or four rows of discs on the cell- walls, and are not 

 distinguishable from Dadoxylon Ouangondianum of St. John, though 

 they are not in a sufficiently good state of preservation to admit of 

 satisfactory comparison. Some of the flattened stems show marks of 

 lateral branches or cones at rare intervals (PI. XVIII. fig. 20) ; others 

 are long, slender, and tortuous, and were probably roots (PL XVII. 

 fig. 5). ' 



Among the specimens collected by Mr. Brown is one with a porous 

 tissue, in the form of a flattened stem or branch, 2 inches in diame- 

 ter, and with a pith half an inch in diameter (not of the Sternbergia- 

 type). The structure of the wood closely resembles that of Aporoxylon 

 primigenium, linger. 



2. Stigmaria pusilla, spec. nov. PI. XVII. fig. 3. 



Allied to S. exigua, but with larger and more distant scars, not in 

 depressed areoles. 



A few fragments of the bark of this species were found scattered 

 over the surface of a slab at Perry. It is of the same slender type 

 as Stigmaria exigua, of the Chemung group of New York, but is 

 sufficiently different to warrant the belief that it was the root of a 

 distinct species of Sigillaria. 



3. Cyperites. 



Two kinds of leaves, resembling those of Sigillaria, occur at Perry. 

 They are a line or less in breadth and 3 inches or more in length, 

 and have respectively two and four well-marked ribs. Though 

 no trunks of Sigillaria have been found, I regard these leaves and 



