132 PROCEEDINGS OF THE ACADEMY OF [Feb., 
Chiefly or wholly found at high elevations, and very rare in the region 
north of Cave Creek. 
E, fulvus alaskensis differs chiefly from fulvus by having about one 
whorl less in shells of similar size. On the first whorl the radial strize 
begin at the first fourth, and are about as close as on the rest of the 
shell. There are no spiral strie on the first or later whorls. The 
last whorl has 90 to 105 strie inl mm. _ £. f. alaskensis was described 
from Dyea Valley, Alaska. It is also before us from Petropavlovsk, 
Kamchatka, collected by Dr. William H. Dall. It extends southward 
in the Rocky Mountains to the Chiricahua and Huachuca ranges, in 
southern Arizona, chiefly at high elevations. 
—— Mee 
<e wat 
Fig. 26.—Euconulus fulvus alaskensis Pils. A, B, cotype, Dyea Valley, Alaska; 
C, Head of Cave Creek, Chiricahua Mountains. 
Mr. E. G. Vanatta has made a careful study of the American forms 
of Euconulus fulvus in order to determine the status of the Chiricahuan 
form, using high magnification to bring out the minute sculpture. 
It appears that all the forms examined have a minute sculpture of 
excessively close, regular vertical strize, though in some examples 
it is less distinct than in others. This sculpture, when strongly 
developed, lends a silk-like luster to the surface in quite fresh examples. 
In E. fulvus from the northeastern United States the first whorl has 
fine spiral strize and very indistinct traces of vertical (radial) strie, not 
seen in some but legible, though weak, in other examples. The upper 
surface of the last whorl has about 126 vertical striz in 1 mm., crossed 
by spiral striez. There are about 6 whorls (figs. 27, B, c, Herkimer 
Co., N. Y., No. 59,521 A. N.S. P., alt. 2.4, diam. 3.1mm. Fig. p, 
Buckfield, Oxford Co., Maine, No. 87,302 A. N. S. P., alt. 3.5, diam. 
3.4 mm.). The largest examples seen are from Buckfield, Me., 
collected by Mr. J. A. Allen. 
An English example (fig. 274, Burnley, England, R. Walton coll., 
75,912 A. N.S. P.) has distinct vertical striz on the first whorl as well 
as spirals, and on the last whorl there are 140 vertical striz in 1 mm., 
with no noticeable spirals. Alt. 2.4, diam. 2.8 mm. 
