16 MR. NEWELL ARKBER ON THE CLARKE COLLECTION _[ Feb. 1902, 
44). eee usually appear to be subcircular, with a diameter of 
7; to ~; inch. The number of free segments appears to vary from 
fourteen to twenty-four, fourteen being the commoner number. 
Specimen No. 8. [Figured by McCoy (47) pl. xi, fig. 3.]—The 
unbranched specimen, figured as Phyllotheca ramosa, is 2 inches long, 
and 2 inch broad. It Came ists of two nodes and three internodes, 
with a surface very faintly striated; the striz are, however, 
more prominent at the nodes. The distance between the nodes 
is exactly 1 inch. Immediately above a node is a subcircular 
depression + inch in diameter, which is probably a branch-scar. No 
leaves or branches are borne on this specimen. In dealing with 
such leafiess fragments, it is not strictly correct torefer them to the 
genus Phyllotheca, for in this condition it is difficult or impossible to 
discriminate between Phyllotheca, Schizoneura, and Archwocalamites, 
or even some Calamites.' 
Specimen No. 11. (?)Fructification of Phyllotheca.— 
McCoy in his memoir figures this specimen (pl. x1, fig. 1) as the 
inflorescence of Phyllotheca, which he regards as agreeing very. 
closely with ‘the male flowers of Casuarina stricta. * This is the 
earliest account of the fructification of the genus, and even at 
the present day our knowledge on this subject is very incomplete. 
A great contribution has been made quite recently by Prof. Zeiller,® 
who has described well-preserved fructifications of Ph. Rallii. In 
this species, the fructification consists of alternate verticils of sterile 
bracts, and sporangiophores. The latter are perpendicular to the 
axis, and bear four ovoid sporangia on the inner side of a distal, 
peltate dise. In Ph. deliquescens, described by Schmalhausen,* the 
fructification is somewhat different, there being several verticils of 
sporangiophores between two successive sterile whorls of bracts. 
These are ee the only two types in which fructification is 
known.’ - 
McCoy’s Sores from Mulubimba, is an isolated fragment, 
Le inches long. The axis consists of a number of short internodes, 
35 to x _ inch long, striated longitudinally. A microscopic exam- 
ination pre no evidence of leaf-sheaths for at least nine nodes, 
representing the greater part of the specimen. McCoy (Joc. cit.) says 
that such leaf-sheaths occur, and are exactly the length of the inter- 
node, but I think that he has mistaken the striated internodes for 
leaf-sheaths. At one node only, a long leaf-like segment is given 
off. The preservation of the fossil is by no means good, and will 
only permit me to say that at each node, and on either side, a 
bunch occurs of several small ovate bodies, apparently closely attached 
to the node, which may be sporangia. I have not, however, been 
1 Seward (98) pp. 284-85. 2 McCoy (47) p. 155. 
* Zeiller (99) p. 65. 
4 Schmalhausen (79); see also Solms-Laubach, ‘ Palaophytologie’ Leipzig, 
1§87, pp. 184-85. 
> See Seward (98) p. 286. 74. 
