334 Barber , — Oti Nema tophyc u s Storriei, nov, sp . 
The microscopic examination of the present species has 
been rendered difficult on account of the smallness of the area 
of the sections ; but the structure is preserved in a most 
remarkable manner, rendering the slides much more amenable 
to photographic methods than those of N. Logani . In general 
character the plant consisted of a number of separate inter- 
lacing tubes, undivided, usually unbranched, but of varying 
size. The tubes cannot be sharply divided into large and 
small, as is the case in N. Logani ', but the spaces between the 
larger tubes contain those with thinner walls and of smaller 
diameter (Figs. 5, 6, 7, 8). 
Scattered through the tissue are ‘spaces,’ as in N. Logani. 
But the spaces in N. Storriei are more or less isodiametrical 
in transverse section, as contrasted with the radiating spaces 
of N. Logani. From the smallness of the specimens I have 
not succeeded in satisfying myself regarding the existence of 
4 rings of growth.’ 
Having regard to the characters enumerated thus far, we 
notice in N. Logani all the appearances of a secondary tissue. 
The regularity of the larger tubes, the growth-rings and the 
radiating spaces at right angles to them, might, indeed, appear 
to indicate the secondary tissue of a form having the scattered 
spaces and varying loosely arranged tubes of N. Storriei. 
With regard to the periphery, it is exceedingly doubtful 
whether it is represented among the specimens examined. 
In one or two cases, however, an indentation of the surface is 
accompanied by a complete change in the direction and 
arrangement of the tubes — a fact which would seem to indicate 
that the indentation was caused by a surface-wound during 
the life of the plant. If such be the case, it may be con- 
fidently affirmed that there is no bark or definite external 
layer in N. Storriei. 
Such are the main characters of Nematophycus Storriei. In 
the matter of branching , we find, as pointed out by Professor 
Penhallow in N. Logani , that the spaces are the regions where 
this is most evident. In fact, while it requires great care to 
detect such branching of the large tubes in the latter fossil, in 
