Possible Nezv Coal-Plants Etc., in Coal. — Gresley. ii 
vading the more cloudy one. Near the exterior of the nu- 
cleus are beautiful plays of microscopic aborescent pyrite, 
which wave about ..n-'. creep inwards or towards the center 
of the seed. There are near the ape . or ^, certain yello'.v- 
ish brown inclusions or foriiHtions /;. that may suggest an 
embryo. At the base of the seel ipay 'e noticed several in- 
teresting structural te.i< ,.-es pcil:;iainp to the peduncle. 
The !eft hand half of the ' cure shows a portion of the ex- 
otesta removed so as to oring into view the aspect of the 
membrane fig. 5, and beneath this membrane at g the sur- 
face of the kernel or seed itself appears, which surface is 
marked or bears the impress of the pattern or formation sug- 
gested by the drawing fig. 5 — the membrane c. Observe the 
rugged exterior of the outer envelope d. In some specimens 
this is seen to be broken and displaced, suggesting something 
harder than a fleshy composition. 
From mineralized nodules in the coal bed at What Cheer, Iowa. 
Fig. 2. Pattern or quasi tessellated appearance of the exotesta d 
fig. I. The color of it is golden brown to greenish gold — has 
a bronzy aspect. 
Fig. 3. Suggests the charai ter of the substance or structure of the 
exotesta d. In color is grayish, but often mottled or var- 
iegated — black, white, gray, brown, yellowish and reddish. 
Near the sides the cells become smaller. 
Fig. 4. Hairy aspect of the inner surface of the exotesta d : greatly 
magnified. 
Fig. 5. An attempt to depict the pattern or moulded form of the 
membrane or thin envelope in contact with the endosperm g. 
In substance this membrane is very brittle, thin, and of a 
golden brown color. Where the kernel g is widest the pat- 
tern is best developed ; as the micropyle is approached the 
pattern is elongated, contracted and narrowed down as in- 
dicated in fig. I. In reality this pattern consists of little 
ovoid knobs within little ovoid depressions. 
Fig. 6. Transverse section of the membrane c, so far as showing 
its corrugations. 
Fig. 7. Oblique view of part of the base of this Cardiocarpus, 
showing the hilum /, and what is perhaps a radicle or cau- 
licle i protruding into the nucleus g fig. i. This radicle?, or 
whatever it is, is colored golden brown outside, and its in- 
terior substance is white. Does this feature indicate two 
cotyledons ? 
Fig. 7. a. Longitudinal section of another aspect of the base or 
near to the base of this or another species. I do not under- 
stand it. * 
Fig. 7. b. View of the base of the nucleus g, fig. i : ? the hilum. 
Fig. 8. Longitudinal section, end view, of one of these specimens 
of Cardiocarpus. 
