On the Fructification of Sphenophyllum trichomatosum. 59 
The structure of the stem has been fully described by 
Renault! and from a specimen of a cone preserved in silica, 
which was discovered at St Etienne, he was enabled to deter- 
mine the heterosporous condition of the sporangia.” 
SPHENOPHYLLUM TRICHOMATOSUM, Stur. 
Asterophyllites trichomatosus, Stur, et Sphenophyllum trichomatosum, Stur, 
Die Carbon Flora der Schatzlarer Schichten, 
Abth. ii. Die Calamarien der Carbon-Flora 
der Schatzlarer Schichten, p. 202, pl. xv., 
figs. 1-4, 1887 (in Abhandl. d. k. k. geol. 
Reichsanst., xi. Band., ii. Abth., Wien, 1887). 
Sphenophyllum tenerrimum, Weiss (not Ett.), Aus d. Steink., 1882, p. 12, 
pl. x., fig. 63. 
so a Weiss, Steinkohlen-Calamarien, vol. ii., p. 199, 
pl. xvi., figs. 4, 5, 1884 (Abhandl. z. geol. 
specialkarte von Preussen u. d. Thiirin- 
gischen Staaten, Band v., Heft 2, 1884). 
Description.—Stem jointed, slightly swollen at the nodes, 
furrowed, surface of stem bearing numerous, irregularly- 
placed fine apiculi, ramification lateral, irregularly developed 
leaves verticillate, about eight in a whorl, formed of narrow 
linear single-veined segments with truncate extremities, 
dichotomising, about as long or longer than the internodes; 
cones with short internodes and many verticils of bracts; 
sporangia ovoid, placed on the horizontal portion of the bract 
a short distance from the axis. 
Remarks.—I am indebted to Mr W. Hemingway for several 
specimens of the fruit of Sphenophyllum trichomatosum, Stur. 
They are preserved in a light grey fine-grained shale, and 
though none of the cones shows its complete length, they 
exhibit very clearly the arrangement of the sporangia. 
Figs. 1 and 2 (d) give their general structure. The inter- 
nodes are short, and the bracts do not appear to be so much 
or so suddenly bent upwards in their distal portion as in 
some other species of Spenophyllum. The position of the 
1 Ann. d. Sci. Nat., vol. iv., Bot., 1876, pp. 277-311. See also Renault, 
Cours d. botan. foss., vol, ii., 1882; Felix, Untersuch. iiber d. inneren Bau 
westfalischen Carbon-Pflanzen—Abhandl. k, Preussischen geo]. Landes- 
anstalt, vol. vii., Heft 3. Berlin, 1886. 
2 Ann. d. Sci. Nat., vol. iv., Bot., p. 303, pl. ix., fig. 9. 
