456 MR. W. C. WORSDELL ON THE 
with the protoxylem as a centre. The large, anomalous cortical 
strands are already known in other species of Cycas. 
(4) The occurrence in the hypocotyl of a seedling of Macro- 
zamia spiralis, Miq., of large strands passing obliquely from the 
central stele to the periphery, splitting into three parts as they 
approach the periphery of the root. These may belong to some 
effete system of lateral roots. The absence both of extra-fascicular 
zones and of a medullary system of vascular bundles in the stem, 
thereby affording a remarkable difference from Macrozamia 
Fraseri, Miq. 
(5) The most important character of the anatomy of the 
seedling of Stangeria paradoxa, T. Moore, is the occurrence in the 
lower part of the lamina of the cotyledon, and in the stalk common 
to the two cotyledons, of primary concentric bundles, which, 
passing both upward and downward in the organ, gradually 
become collateral. This fact is probably of great phylogenetic 
importance. 
In the root of the seedling large, concentric strands are seen 
passing very obliquely outward from the central stele and entering 
endogenous lateral organs arising apparently from some outer 
layer of the cortex. 
(6) The adult stem offers two points worthy of note: the 
occurrence of peduncular bundles in the pith which are "m 
passing into the central cylinder all around, whose origi? an 
course have been fully dealt with by Solms-Laubach ; the incom 
plete strands of vascular tissue in the periphery of the corte 
observed in but one isolated portion of the stem, an 
probably represent an effete cauline system of concentric 
(7) In the large adult stem of Ceratozamia mexicana, Brongn» 
the peduncular bundles of the pith are the only characters ¢® he 
for attention, whose course in the pith and origin in the p ~~ 
can be at places observed with great clearness, thus conn 
Solms-Laubach’s previous investigations. Some of these i» a 
in the pith show a tendency to become concentric 1n trae tion 
cambium forming xylem and phloem with inverted orienta 
opposite the protoxylem of the bundle. 
d which 
strands. 
t, for 
In conclusion, my best thanks are due to Dr. D. H. Scott, 
his usual kind assistance and criticisms. 
