Linnarsson — On the Eopkyton Sandstone. 403 



millimetres. At a distance of 15 millimetres, on the middle ridge 

 between the upper sides, another scale (fc) of about the same shape 

 and size is placed. About 30 millimetres in advance a similar organ 

 (c) projects from the upper left hand side, and a fourth {d) is seen, 

 as it were, hanging down from the angle of the outer right side. 

 The scale at c seems to have been cleft in such a manner that some 

 organ, which had for the most part been destroyed, has been rendered 

 visible. 



Of the nature of the objects represented by the other figures, and 

 of their relation to the specimen just described, it is at present diffi- 

 cult to form an idea. In order to draw attention to them, however, 

 I have thought fit to give figures of them. Their presence in the 

 same slab makes it to a certain extent probable that some of them 

 at least belong to the stem described above. 



In Fig. B is shown an oblong body strongly convex, with a very 

 wrinkled and rough surface. It might perhaps be conjectured to 

 have been a spicate inflorescence. Its length is 45 millimetres, the 

 breadth about 10 millimetres. From the right side (a) two narrow, 

 oblong linear bodies run out, one across the base of the other. Their 

 outlines are very distinct on the outer side, on the inner not quite 

 so much so. Both have along the middle a faint furrow, in the con- 

 tinuation of which is seen a faint threadlike ridge (&). A third body 

 of the same form, but shorter and broader, lies at their base. In B' 

 they are represented somewhat magnified. 



In the anterior part of Fig. C a cylindrical body (a) is seen, 

 perhaps analogous to a in Fig. A. In the posterior part at 6 there 

 are three conical tubercles, arranged in a row, round which the sur- 

 face of the stone is finely striated. 



The objects shown by the portion D of the same slab are for the 

 most part very obscure. On the left side are seen several more or 

 less elevated parts (a) marked by faint longitudinal furrows ; they 

 are probably portions of a depressed stem. On the right side is 

 seen a broken, cylindrical, wrinkled body, somewhat resembling the 

 one represented in Fig. B, together with some straight linear ribs, 

 while behind them there is a narrow tube, at the side of which lies 

 an oblong body (h) that may be compared with a in C. Of none 

 of these objects will I venture any interpretation. 



Bhysophycus dispar, n.sp. — There occurs in the Eophyton sandstone 

 more frequently than any other, a strange fossil bearing a close re- 

 semblance to certain forms described by Hall,^ Billings," and Daw- 

 son,^ under the generic names of Biisophjcus^ and Busichnites. It 

 always consists of a system of linear eminences or ribs, arranged 

 symmetrically and more or less transversely on each side of the 

 middle line. The form most closely agreeing with the descrip- 

 tions given, especially of B. bilobatus (Hall) from the Clinton 



1 Pala3ontology of New York, vol. ii., p. 23. 24. 



2 PaliEiizoic Fossils of Canada, vol i., p. 101. 



3 On the Fossils of the genus Rasophyciis, Canadian Naturalist, Oct. 1864, 363. 



* According to the derivation the name is to be written Rysophycus, or, with 

 Eichwald (Lethsea Eossica, vol. 1, p. 64) Rysophycus. 



