A. #. Verrill—The Bermuda Islands; Geology. 191 
There are, however, a few fossil species that have not been found 
in the older rocks, but are still living. The following species have 
been obtained from deposits believed to be of these later periods : 
Pecilozonites bermudensis, var. zonatus Ver. See p. 164. 
PLATE X XVI, riguRES 1,2. PuaTE X XVII, ricuREs 2, a-l. 
Very common. In many of the banks of soft limestone by the 
roadsides, especially near Elbow Bay and Hungry Bay, it weathers 
out in large numbers and great quantities of the clean shells can 
sometimes be found at the base of the banks after rains. It was 
abundant in a bed of partially consolidated sands on the northwest 
side of Charles Island (or Goat Island), where the sea was under- 
mining it. At this place many of the shells retained their brown 
color-bands, and some were curiously mounted on the summits of 
slender columns or pedicels of shell-sand, due to the protection 
afforded by the shells from erosion by the falling spray or rain. 
The shells figured on plate xvi, figs. 1-2, were from this locality. 
At present this small barren island is nearly bare of vegetation 
and quite unfit for the existence of land shells of this kind. Prob- 
ably these fossils date back to a period when this island, Castle 
Island, and the other adjacent small islands were much larger, 
wooded, and connected with the main island at Castle Point, thus 
forming a continuous barrier on the south side of Castle Harbor. 
There is no evidence whether Charles Island (also called Goat Island 
and Old Fort Island), was or was not wooded at the time of the 
first settlements, though a small stone redoubt was built on it at that 
time, of which the ruins still remain.* 
This fossil variety (zonatus) is generally easily distinguishable 
from the recent specimens. The shells are usually distinctly thicker 
and heavier, the spire is usually more obtusely rounded, and the 
body-whorl less sharply angulated in the adult at the base. The 
inner lip nearly always has a thick callus in the adult. The umbili- 
cus is generally decidedly smallert than in the living form, being 
usually about 1™"; sometimes only 0.5™", but is variable in both. 
The fossil shells are usually conspicuously banded with two peri- 
pheral brown bands, often separated by a white band on the keel, 
while the recent ones are generally blotched or transversely flammu- 
* See ‘‘ The Bermuda Islands,” p. 51, fig. 22, for what is known of the history 
of this ruin. 
+ By a typographical error it is said to be larger in my former article (these 
Trans., xi, p. 728, note; and ‘‘ The Bermuda Islands,” p. 316). 
