166 A. E. Verrill—The Bermuda Islands; Geology. 
not angulated at the periphery. The aperture is more lunate than 
in the existing varieties, owing to the more compressed whorls. It 
is larger than the living forms. Faint flammulations of red-brown 
color are preserved. Diameter, 10™"; height, about 5™™. Other 
similar specimens have the diameter, 13™™; height, 6™™. From a 
quarry near Castle Harbor. We found broken specimens of the same 
variety in a road-cut at Bailey Bay, bat without the slight per- 
ipheral furrow. 
It seems to be nearest to P. Reinianus, var. Goode, but the latter 
is smaller and more delicate, has less evident costulation, and the 
whorls are less compressed. 
Peecilozonites circumfirmatus (Redf.) Pilsbry. 
Hyalina circumfirmata Redfield, Am. Lyc. Nat. Hist., New York, vi, p. 16. 
Pecilozonites circumfirmatus Pilsbry, op. cit., 1889, p. 291, pl. xvii, figs. F, 
G, H (shell), A, B [radula and jaw]; same reprinted in Heilprin, ‘‘ The 
Bermuda Islands,” p. 199, pl. 16, 1889; these Trans., x, p. 500, 1890. Verrill, 
these Trans., x, p. 728, figs. 67, a, b, 1902; the same, ‘‘ The Bermuda Islands,” 
p. 316, fig. 67. Gulick, op. cit., p. 420, 1904. 
Figures 48a, 480. 
This delicate species is similar to the last in size and form. Its 
diameter is usually 9 to 12™™; height, about 6-7™™. The fossil shells 
differ but little from the recent ones. It is easily distinguished from 
others of the genus by the internal revolving lamina. 
Figure 48.—Pecilozonites circumfirmatus; a, upper, and 6, under surfaces, x 24, 
from photographs of recent specimens by A. H. V. 
Specimens were found by us at Bailey Bay in the interior of P. 
Nelsoni. It occurs at numerous localities in the Walsingham forma- 
tion with P. Nelsoni, as well as in the later Devonshire and Paget 
formations. We found it common in the strata near Hungry Bay 
just above the Devonshire beach limestones. It is a common living 
species. 
