Notes. 
173 
clearly seen, in tangential sections of the cone, three above and three 
below. As the segments become free, one bundle passes into each, 
and runs right through the pedicel to the lamina. In the fertile 
lamina the bundle subdivides, a branch diverging to the point of 
insertion of each sporangium. 
One of the longitudinal sections passes through the base of the 
cone, so as to show part of the peduncle in connexion with it. 
In this peduncle secondary wood is present, just as in the separate 
specimen belonging to the Williamson Collection. Higher up in 
the axis of the cone, where the sporophylls begin to appear, the 
secondary wood dies out. This evidence materially confirms the con- 
clusion that the Williamson peduncle really belongs to our strobilus. 
Diagnosis. 
It is evidently necessary to establish a new genus for the reception 
of this fossil ; the generic name which I propose is Ckeirostrobus , 
intended to suggest the palmate division of the sporophyll-lobes 
hand). The species may be appropriately named Petty cur ensis, 
from the locality where the important deposit occurs which has 
yielded this strobilus and so many other valuable specimens of 
palaeozoic vegetation. The diagnosis may provisionally run as 
follows : — 
Ckeirostrobus , gen. nov. 
Cone consisting of a cylindrical axis bearing numerous compound 
sporophylls, arranged in crowded many-membered verticils. 
Sporophylls of successive verticils superposed. 
Each sporophyll divided, nearly to its . base, into an inferior and 
a superior lobe ; lobes palmately subdivided into long segments, of 
which some (probably the inferior) are sterile, and others (probably 
the superior) fertile, each segment consisting of an elongated stalk 
bearing a terminal lamina. 
Laminae of sterile segments foliaceous ; those of fertile segments 
(or sporangiophores) peltate. 
Sporangia large, attached, by their ends remote from the axis, to the 
peltate laminae of the sporangiophores. 
Sporangia on each sporangiophore, usually four. 
Spores very numerous in each sporangium. 
Wood of axis polyarch. 
C. Petty cur ensis, sp. nov. 
