462 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 2Q, 



but all in a very imperfect state. I believe that I can recognize re- 

 presentatives of the three species which I have named respectively 

 P. princeps, P. elegans, and P. glabrum, but cannot be quite certain of 

 this. Here, as elsewhere, I should have been ready to refer these 

 Plants to the convenient category of Fucoids, but for my knowledge 

 of their forms and structures obtained iii Gaspe. 



8. Leptophixetjm rhombicum, Dawson. PL XYIII. fig. 19. 



Additional specimens of this Plant have enabled me to ascertain 

 that its branches bifurcated regularly, in the manner of Lepidoden- 

 dron, and tapered somewhat rapidly; that its leaves were long, 

 parallel-sided, and one-nerved ; and that it produced strobile-like 

 bodies with narrow-pointed, closely appressed scales borne on the 

 sides of the branches. I have attempted to give a restoration of the 

 Plant, from several specimens in my possession, in PL XYIII. fig. 19. 

 The other characters of the genus, and the points in which it differs 

 from Lepidodendron and Ulodendron, are stated in my former paper. 



9. Lycopodites comosfs, spec. nov. PL XYII. fig. 14. 



Stem short, not observed to branch, densely covered with long filiform 

 leaves. 



This little Plant, of which several specimens, all equally diminu- 

 tive, were found, somewhat resembles Selaginites Erdmanni of Ger- 

 mar, but is smaller and differently proportioned. 



10. Cordaites (Pychnophyllttm) flexuosus, spec. nov. PL XYII. fig. 9. 



Leaves lanceolate, acuminate, broad at the base; nerves numerous, 

 parallel, somewhat sinuous and uneven. 



A number of more or less perfect specimens of this leaf were found. 

 It has the general appearance of the leaves of Cordaites ; but less 

 distinct venation, and apparently less rigidity than the other species. 

 I place it in this genus merely provisionally, as its true affinities are, 

 of course, quite uncertain. 



11. Cyclopteris Jacksoni, Dawson. PL XIX. fig. 26. 



This is by far the most abundant species at Perry, and a large 

 number of specimens were obtained. One of these shows that the 

 full-grown frond was a foot in length, with a strong woody rugose 

 petiole a quarter of an inch thick at the base. Some of these petioles 

 in a pyritized state show traces of scalariform vessels. Old stipes 

 deprived of their leaves very closely resemble the Bliachiopteris 

 pinnata of the Marcellus shale of New York, though not quite so 

 large, and perhaps more rugose. Among the numerous scattered 

 pinnae of this species there are some of much smaller size than the 

 others, which may possibly indicate a distinct species ; but, for the 

 present, I am rather disposed to regard them as merely a variety. 

 (See PL XIX. fig. 26, c.) 



I also found a few detached pinnules, which I believe to belong 

 to Cyclopteris Halliana, of the Chemung group of New York. I have 

 attempted to represent the characteristic forms of the ordinary varie- 





