1906.]} NATURAL SCIENCES OF PHILADELPHIA. 153 
seem to be referable to this race. In the Northwest another form 
of the species, Z. milium pugetensis Dall, replaces the typical miliwm. 
Neither of the subspecies differs much from milium, but what differ- 
entiation there is seems to be correlated with geographic range. 
This species was erroneously placed in Zonitoides in the Classified 
Catalogue of 1898. We are now convinced that it belongs, as Morse 
demonstrated, to the subgenus Striatura of Vitrea. 
Vitrina alaskana Dall. 
V. pfeifferi Newc., Proc. Cal. Acad., II, p. 92, 1861; not of Deshayes, 1852. 
Vitrina alaskana Dall, Land and Fresh-Water Mollusca of Alaska and Ad- 
joining Regions, Harriman Alaska Exped., XIII, p. 37. 
Arizona: Huachuca mountains (Ferriss), numerous rather small 
specimens, the only ones we have seen from Arizona. It seems to bea 
common species of the Canadian and Transition zones eastward, speci- 
mens being before us from the following places in New Mexico: Chi- 
corico canyon near Raton (Cockerell); Las Huastus canyon, Sandia 
mountains, near Albuquerque (Miss Maud Ellis); near Las Vegas (Miss 
Mary Cooper); White Oaks and Gilmore’s Ranch, Sierra Blanca (Ash- 
mun); Fort Wingate (Dr. E. Palmer); James canyon, Cloudcroft, 
Sacramento mountains (H. L. Viereck). 
The type locality of V. alaskana is Carson valley, Nevada; but it 
has a wide range, from Alaska to the Mexican boundary and probably 
beyond, southward occurring only at high elevations. 
Euconulus fulvus (Miill.). 
Drift of Pecos river, Pecos, New Mexico (Cockerell). Cave creek 
canyon, Cochise county, Arizona (Ferriss). 
Euconulus chersinus trochulus (Reinh.). 
Nautilus, XII, p. 116. 
Texas: Sinking Spring, San Marcos, Hays county; New Braunfels 
and vicinity, Comal county; Hondo river, north of Hondo, Medina 
county; Rio San Filipe near Del Rio, and Devil’s river, Val Verde 
county ; everywhere in drift débris. 
ENDODONTID&. 
Pyramidula cronkhitei anthonyi Pilsbry. n. n. 
Heliz striatella Anthony, Boston Journ. of Nat. Hist., III, p. 278, pl. 3, fig. 2’ 
1840. Not Helix striatella Rang, 1831. 
This shell, well known under the preoccupied name H. striatella 
Anth., has typically a rounded periphery and moderately developed 
oblique and sigmoid rib-strie, 4 or 5 in the space of a mm. on the 
front of the last whorl at the periphery. There are 334 to 3? whorls. 
