1922] BENSON—HETEROTHECA GRIEVII 123 
H. Grievii to have had a tapering apex and a maximum girth nearer 
the base than the apex. The majority of the transverse sections 
through the upper part are circular, but in the basal region the 
sectional area is oval (figs. 8, 9), hence there are two aspects of 
each sporange given in text figs. 1 and 2. 
In longitudinal sections the apical part is seen in surface view 
if present, as indicated in text fig. 3. Inthe upper third, the surface 
loculi are only slightly rubbed down in the center, the lateral ones 
being seen almost in surface view. If two sections are secured 
< Plane of 383.10 
Plane of 387.12 
D° of 383.1! 
Bot 383 D of 387.11 
: of 3831 of 387. 
‘ : 
Fic. 1 : Fic. 2 
Fics. 1, 2.—Showing slightly bifacial form of sporange as indicated by plotting 
series of transverse sections to scale on vertical line; fifth section in series (CN . 383. 14) 
just included five separated bases of loculi series, a fact on which the length (4 mm.) 
i ced. 
longitudinally through a single sporange, they are both somewhat 
peripheral, as the size of the body scarcely admits of two longitu- 
dinal sections. Both transverse series and longitudinal sections 
show that the sporange was almost always somewhat injured at 
the base where it has become detached from the parent plant. 
ANATOMY.—The whole sporange is surrounded by a large- 
celled epidermis. The contents of the epidermal cells are carbon- 
ized, and from the mode of preservation of mucilaginous tissue in 
the Pettycur deposits, this blackened condition of the epidermis 
evidently precludes the view that it was mucilaginous (fig. 1). 
Beneath the epidermis is the hypoderm, composed of about five 
layers of cells. This tissue is continuous with the interstitial tissue 
between the loculi. In this cortical region are frequently found, 
