lo The American Geologist. January, looi. 
Fig. 5. Illustrations of stamens, or the ? calyptra of the same, in 
another specimen of the same inflorescence. 
Fig. 6. Longitudinal section through the central part of a cone 
showing several barren ? seed-vessels b at the top of the 
stalk a. 
Fig. 7. Longitudinal section of a fragment of a twig or branch 
showing indications of the peduncular attachment belong- 
ing to one of these inflorescences. The form of one twig 
seems to have been deeply grooved longitudinally, and was 
perhaps of hexagonal section. 
Reference to Plate VF. and Remarks on the Fossils. 
Fig. I. View of a group of small conical forms, some attached to 
the stalk and branch, as exposed by fracturing a mineralized 
nodule (pyrite, lime, etc.) taken from the coal at What 
Cheer, Iowa. In this specimen the stalk consists of a soft- 
ish, brownish black material and exhibits no organic struc- 
ture. In close touch with these cones were several nuts of 
Cardiocarpus (Plate VII). 
Fig. 2. Longitudinal section of a cone?, and a cluster of what 
looks like three seeds within bractiform envelopes ; both ob- 
jects are attached to the badly-preserved twig. From the 
same pyritous concretions in Iowa coal. 
Fig. 3. Longitudinal and rather oblique section of the terminal of 
a branch or twig, bearing what appears to be a damaged in- 
florescence at a. Brought to light by grinding and polishing 
the pyritous material out of the coal in Iowa. 
Fig. 4. Transverse section through the lower part of the twig fig. 
3, showing leaves surrounding the twig or branch, of which 
there seem to have been about ten to each node. 
Fig. 5. Longitudinal section of what appears to be a terminal of 
some twig belonging to still another plant. 
Fig. 6. Longitudinal section of part of a seed bearing ? twig of 
possibly still another species. 
All of the above specimens were discovered in the pyritou.s 
nodular concretions out of the coal-bed at. What Cheer, Iowa. 
Reference to Plate VII. and Remarks on the Specimens. 
Fig. I. Longitudinal sectional view or diagram, compiled from 
several different specimens, of a Cardiocarpus — (cardiocar- 
pon fruit). The right half of this fruit, seed, or nut, from 
the line a & is wholly sectional, and shows indications of 
bracts or leaves c enclosing or partly surrounding the ex- 
otesta d. Between the latter and the perispermic membrane? 
is a zone of calc-spar f. g is the nucleus — the endosperm, 
consisting of milky white calcareous material, and exhibiting 
a beautiful radiate flocculent structure by a paler tint per- 
