MUSEUM OF COMPARATIVE ZOOLOGY. 185 
aperture lunate, well rounded, and nearly circular; peristome reflected, rounded ir 
front, the margins joined by a triangular tooth on the parietal wall. Greater diam- 
eter 6 mm., altitude 5 mm. 
Oyster Bay, Florida. 
This is a small, very elevated form of the P. cereolus group. 
The above is Mr. Hemphill’s description. 
Mesodon ptychophorus, A. D. Brown, var. castaneus, Hermrnitr. 
Shell umbilicated, globosely depressed, of a dark chestnut color; surface covered 
with coarse, irregular, widely separated lines of growth, and crowded, microscopical 
revolving lines; whorls 54, convex, the last slightly descending in front, spire ele- 
vated; suture well impressed, aperture subcircular, lip white, reflected and par- 
tially covering the umbilicus, its terminations approaching ; umbilicus small and 
deep. Height § inch, diameter 1 inch. 
Old Mission and Rathdrum, Idaho. 
I regard H. ptychophorus as the progenitor of what I call the T’ownsendiana group 
of West Coast land shells, and this colored variety seems to still further indicate 
its relationship to Townsendiana, for the spire whorls of nearly all the specimens 
of Townsendiana that I have collected are chestnut-colored. Zownsendiana does not 
begin to put on its wrinkles until it has made about four revolutions of the shell. 
The wrinkles are probably due to its environment. 
The above is Hemphill’s description, from The Nautilus, Vol. IV. p. 41, 
1890. 
Aglaja fidelis, var. flavus, Hempnir4. 
Shell umbilicated, elevated, very faintly subcarinated, of a uniform light yellow 
color throughout, without bands or other stains of coloring; whorls 64, convex, with 
coarse oblique strie, and microscopic irregular revolving lines; peristome reflected 
below, simple above; aperture roundly ovate; umbilicus moderate, and partially 
covered by the reflected peristome; suture distinct. Greater diameter 34 mm., alti- 
tude 23 mm. 
Chehalis and San Juan Islands, Washington ; Port Orford, Oregon. 
This isa rare and beautiful variety of this well known West Coast land snail. 
The above is Mr. Hemphill’s description. 
Aglaja fidelis, var. subcarinata, HEMPHILL. 
Shell orbicularly depressed; umbilicated; of a deep dark chestnut-color without 
bands; whorls 64, convex or somewhat flattened, the last subcarinated at the 
periphery ; strie coarse, oblique, crossed by numerous well defined wavy revolving 
lines; peristome simple, thickened above, reflected below, and nearly covering the 
umbilicus ; umbilicus moderate; aperture roundly ovate; suture well impressed. 
Greater diameter 37 mm., altitude 20 mm. 
Humboldt Co., California. 
