New Coal Plants i?i Coal. — Gresley. 51 
contrast in color, between blacks and grays, that their pres- 
ence is quickly revealed to the investigator. This species is as- 
sociated with many other kinds of vegetation, among which 
are those treated in the Oct. 1899 number of this magazine, 
and intended to be illustrated in future. Appearances suggest 
a monocotyledonous stem, devoid of outward curving bundles; 
observed also in the "Pittsburg" coal bed, the No. II seam 
of Illinois, and in the coal bed at Whatcheer, in Iowa. 
Plate III. 
Fig. I. Nearly vertical section of parts of two similar .species of 
what is possibly a coal-plant new to science. These two irregular black- 
ish layers constitute, as ordinarily observed and to the naked eye, a 
pair of pitch-coal lamina in ordinary coal. On closer inspection, how- 
ever, each of these layers or zones is composed of five more or less 
horizontal streaks or leaves of irregular form, namely a gray central 
zone, merging here and there into a dense black zone above and below 
it; and on each side of this again, i, e. , constituting the upper and low- 
er parts of the specimens, appears a grayish black, wavy, or tooth- 
shaped zone, marked a and a ' in the figures i, 2, and 3. It is only in 
the zones a and a ' that organized structures have been detected. 
Fig. 2. Approximately vertical section of part of one of the layers 
in figure I, enlarged in order to give an idea of the cellular structure 
observed in the zones a and a ', each of which appears to be practically 
a counterpart of the other. The scale to which this drawing has been 
made is, however, much too small to show more than about one-tenth 
of the number of the rows of cells in each split tooth or lobe of the lay- 
ers, and of the number of separate cells in each row. 
Fig. 3. Gives a rather better idea of the aspect of the cells whose 
arrangement and grouping is indicated by figure 2. The cells appear 
as little gray dots in rows, and the cell-walls (black) seem to be quite 
thick. It should be noted that while nobedding-plaiie or parting exists 
along the base of the layers a and a ', the cellular structure begins in an 
even, definite, and clear njanner along or upon the dense black struc- 
ureless zones as shown in figure 2. 
Observatiofis regarding the specimens {figures i, 2 a7id j, 
plate III.) No edges or terminals, looked for in a horizontal 
direction in the specimen of coal in which this form occurs, 
have been detected. The specimen of coal is about two inches 
in thickness, i. e., it contains about that thickness of the par- 
ticular bench or division of the seam it was taken from — the 
"Ten- Yard" or "Thick Coal," of South Stafifordshire, Eng- 
land, and in this two inches or so are four or five individual (?) 
