A. EF. Verrill—The Bermuda Islands; Geology. 71 
It seems to form most of the narrow neck of land that extends from 
Tucker’s Town eastward to Castle Point. The extinct fossil land 
snails occur at many localities in this district. 
Thus it seems to be continuous along the shores, from the point 
near Coney Island to Castle Point, a distance of several miles. 
Apparently most of the rocks of Hamilton Parish belong to this 
formation. It occurs also at Tuckers Town and on the shores of 
Harrington Sound. Sharks Hole,* with the cliffs west of it, and 
Devil’s Hole seem to be excavated in the Walsingham formation, 
though only very few imperfect fossils were found at those places. 
The hard rocks on Pear Island and Trunk Island are probably of 
the same age. 
Mr. A. Gulick records a locality on the west side of Knapton Hill, 
near the west end of the sound, where a layer of red earth, about 
8 to 10 inches thick, and containing several characteristic species of 
fossil snails, rests on a limestone of this formation. 
It occurs along the roadside, from Bailey Bay to near the cause- 
way, for I have found good specimens of P. Nelsoni in it at several 
places there. I also found it in the ledges outcropping near the 
shore at Mr. Seon’s beach, Bailey Bay. 
On Bailey Bay Island it occurs near the sea-level, on the north 
side, and extends to an unknown depth below it. At this place I 
have obtained P. Velsoni from ledges submerged even at low tide. 
Similar hard rocks occur on other small islands, and on the shores 
farther westward, but as they have not yielded the fossil snail (P. 
Nelsoni), they cannot now be referred to this formation with any 
certainty. The same is true of the hard limestones forming the 
upper ledges on many of the higher hills. They may belong to the 
Walsingham formation, but this cannot be demonstrated until extinct 
fossil snails occur. 
It apparently outcrops on the northern side of Hamilton Harbor. 
On Ireland Island, Nelson described a cavern in it, containing great 
* These Trans., p. 438, pls. 1xxi, lxxiii ; ‘‘ The Bermuda Islands,” p. 26, same 
plates. 
+ Some of the species of Pecilozonites that are found as fossils are still living. 
This is notably so in the case of P. Bermudensis (pl. xxvi, figs. 1, 2; pl. xxvii, 
figs. 1, a-l), which occurs both in the Walsingham formation and in the later 
ones. It is often very abundant in some of the later and softer limestones, 
retaining conspicuous bands of color. The fossil variety (variety zonata, pl. 
Xxvii, fig. 2) is rather larger and thicker than the recent ones. This species, 
therefore, cannot be used for determining the age of these limestones. 
