File:The Quarterly journal of the Geological Society of London (12980906265).jpg

1858.. PHILLIPS FOSSIL FRUIT. 47
fruit, is a sort of collar (fig. 1, c) ; its external face is striated ;
Fig. 1. — Fossil Fruit from the Upper Wealden Beds in Swanage
Bay. View of the terminal surface, showing the origin of seven
ridges, and space for the eighth. Magnified six times.
c. The collar.
within it, towards the axis, a depression. Between the other pro-
minences a similarly-placed arched depression is traceable, and there
seems nothing to prevent the supposition that a similar collar may
have existed.
The eight ribs and the intervening hollow surfaces (see figs. 1
and 2) are striated by radiating vessels, which vary in size from
WO" ^^ TdVo" ^^ ^^ ^^^ ^ diameter (figs. 3, 4, 5, 6, and 7). They
are pressed together, very continuous, occasionally dichotomous ; and
in this case, the divided vessels lie side by side (figs. 4 and 5).
In fig. 5, appears a curious example of this dichotomy both up-
wards and downwards. They are all jointed at intervals which
frequently measure about four diameters of the larger vessels.
The surfaces are marked by projections, which, for the most part,
appear as mere roughness (figs. 5 and 6), but in a few cases resemble
fine oblique parallel striae, g-j^^ of an inch apart, and meeting the
sides of the tube at an angle of 40° (fig. 7). In other cases they
appear as small puncta, ranged in one line, at intervals equal to half
the diameter of the tube, or scattered in a less regular manner.
These last-mentioned observations are difficult, even dubious, and