MUSEUM OF COMPARATIVE ZOOLOGY. 187 
fornia. A glance at the map will show how widely separated geographically 
H. Coloradoensis is from its nearest allies, and this discovery of Dr. Merriam’s 
extends the distribution of the West Coast type of Helices farther to the eastward 
than heretofore, and adds an area of great extent to that previously known. 
The above description and figure were published by Stearns in Proc. U. S. 
Nat. Mus., Vol. XIII. p. 206, Plate XV. Fig. 6, 7, 8, 1890, all copied above. 
I have examined the jaw and lingual dentition to find them similar to those 
of the other species of Arionta. 
Arionta Traski, var. proles, HEMPHILL. 
Shell umbilicated, very much depressed, thin, shining, of a dark horn-color ; 
whorls 54, somewhat flattened above, convex beneath, the last slightly falling in 
front, with a dark band above the periphery, and crowded with strong oblique 
striæ; suture well impressed; umbilicus moderately large and deep; aperture 
hardly oblique ; peristome simple, thin, subreflected, its terminations approaching. 
Height § inch, breadth $ inch. 
Tulare Co., California, near Fraser’s Mill. 
A much flatter and more depressed form than any of the varieties of Traski that 
I have seen. There are no revolving microscopical lines, as in Traski. 
The above is Mr. Hemphill’s description. 
Arionta tudiculata, var. Tularensis, Hrmrmitr. 
Shell umbilicated, very thin and frail, shining, of a light greenish horn-color, 
globosely depressed; whorls 5}, convex, the surface minutely granulated, and 
crowded with fine oblique striæ, with a single chestnut revolving band; suture 
well impressed; umbilicus very small; aperture oblique, subcircular; peristome 
simple, hardly thickened, its columellar portion expanding and nearly covering the 
small umbilicus. Height § inch, breadth 4 inch. 
Tulare Co., California. 
This is one of those puzzling intermediate forms uniting two species that can be 
with equal propriety placed in one or the other. It has the exact form of the 
typical Traski found at Los Angeles, and along the coast, though much smaller 
and thinner, and it has the sculpturing of tudiculata much modified. It seems to 
fill the gap quite completely between those two species. 
The above is Mr. Hemphill’s description. 
Arionta tudiculata, BINNEY. 
Plate II. Fig. 7, 8. 
New figures are here given of the form cypreophila. 
In The Nautilus, Vol. IV. p. 41, 1890, Mr. Hemphill also describes a 
var, subdolus thus: — 
