12 F TRIASSIC FISHES AND PLANTS. 
they shall be carefully sought for, remains to be seen. A conclusive com- 
parison cannot be made, however, till a thorough search for fishes is insti- 
tuted in the southern basins; for, while we do not always find the things 
we seek, we make full collections of those fossils only which are the objects 
of special search. 
A comparison of the fossil plants of the northern and southern basins 
is somewhat more satisfactory, and yet the limited number of species obtained 
at the North leaves the result of such comparison far from conclusive. —Pro- 
fessor Fontaine, as has been mentioned, has enumerated about forty species 
of plants obtained from the Richmond and North Carolina coal basins. 
Among these perhaps the most abundant is the large monophyllous fern 
Twniopteris magnifolia of Rogers, but this has not yet been found anywhere 
at the North, nor has any other similar fern been met with there. Another 
common plant at Richmond is Schizoneura planicostata (Calamites planicos- 
tatus of Rogers), and this I have found at Milford, N. J.; Durham, Conn ; 
and Sunderland, Mass. An allied plant is Hquisetum Rogersi, Schimper 
(Lquisetum columnare of Brongniart and Rogers). Professor Fontaine says:’ 
“This plant is one of the most characteristic fossils of the Richmond coal 
field, and has a wide vertical and horizontal range.” He further says that 
it is almost everywhere found with Macroteniopteris magnifolia, and that they 
form the only fossil plants of some localities. This plant is rare at the North, 
as I have obtained it from but one locality —Milford, N. J. Another common 
plant at Richmond is a fern, belonging to the genus Clathropteris, which 
Fontaine?’ identifies with C. platyphylla var. expansa Saporta, and with C. rec- 
tiusculus of Edward Hitchcock, jr., described in the American Journal of 
Science for July, 1855. This plant oceurs rather abundantly at Durham, 
Conn., and at Hast Hampton, Mass. We find also at the former place a 
delicate and slender Baiera, which may not be distinct from that obtained by 
Emmons in North Carolina and figured by him in his American Geology, 
Part 6, page 133. Another common plant at Durham has a simple flattened 
stem from half an inch to an inch in width and sometimes a foot or more in 
length. This is apparently identical with that figured by Emmons,’ and 
named by Fontaine Bambusiwm Carolinense. 
1 Mon. cited, p. 12. *Ibid., p. 54. 3 American Geology, part vi, p, 132. 
