172 PROCEEDINGS OF THE CALIFORNIA 



7 Aplodon Columbianus Lea. A few found in Hell Gate Val- 

 ley, Montana, by Hemphill, are large and very well developed, while tliose of 

 Odotropis devia GliJ., from Deer Lodge Valley, at a lower elevation, 

 are only half as large as coast specimens, or even less. Neither had been be- 

 fore recorded from east of the Cascade Mountains. 



SPupilla Rowellii J^euw. From Georgetown, El Dorado Coun- 

 ty, Rowell, to San Gorgonio Pass, Voij ; and the latter careful explorer has also 

 found it at Indian Valley, Plumas County, at about 4,000 feet elevation. 



Alexia Leac/i. Shell elliptic-ovate, spire short, of 5 to 8 whorls, 

 body whorl very large, rounded at base, aperture about half the length of the 

 shell, with from one to five lamellar teeth on the parietal wall, and a labrum 

 either simply thickened or expanded, and with teeth within its margin. Of 

 family A u r i c u 1 i d iB . 



9 A. SETiFER Cp. Outline from ovate to lanceolate, smooth or faintly 

 ribbed longitudinally, pale to dark purplish horn-color, often striped (by ero- 

 sion of the riblets), spire acute, whorls 6 to 8, the last nearly three-fourths 

 of total length, aperture about two-thirds of length, peristome thickened and 

 slightly expanded, especially in front, the most perfect with a tubercular tooth 

 on middle of outer wall, and less developed ones below it, lower lip curving up 

 to parietal wall, leaving a slight umbilical fissure behind it, and ending in a 

 strong horizontal fold that winds like a flat tooth into the aperture ; parietal 

 wall with a flat horizontal tooth near its middle, and one or two more at regu- 

 lar intervals above it ; thus showing five teeth in the best developed specimens. 



Young, with a single row of close-set bristles revolving on an impressed line 

 just in front of the sutures, but lost in adult, though the groove usually remains. 

 Altitude, 0.30 to 0.40 ; diameter, 0.08 to 0.14 inch. Animal, yellowish white 

 translucent ; eyes black, tentacles transparent, faintly wrinkled ; muzzle strong- 

 ly wrinkled. Habitat, Mission Creek, San Francisco, near head of tide-water, 

 abundant. This pretty and conspicuous shell seems to have escaped notice 

 until this year, though extremely abundant for an area of a half a mile along 

 Mission Creek. As I cannot find it in any other locality, I have suspected its 

 introduction attached to the boats or nets of Chinamen, but cannot find that 

 any such species is known from China, and it seems too numerous to have been 

 introduced within twenty years. The A. myosotii found on the Atlantic coast, 

 is supposed to have been imported accidentally from Europe. They live for 

 three weeks or more out of water if kept damp, and belong rather to the ter- 

 restrial than the aquatic guoup, though never living far from brackish water. 

 Their nearest allies in California are the Pedipes unisulcata Cp., 

 described in Vol. Ill of these proceedings, page 249, f. 29, and M elam p u s 

 o 1 i V a c e u s Cpr., both southern species ; while no Alexia is known this 

 side of Panama. 



10 Leptolimnea, n. sp.? Fish Springs, Nevada. 



11 Leptolimnea, n. sp.? Near Walla Walla, Washington Territory, Hemp- 

 hill. Both new to our fauna, but may have been described by eastern concholo 

 gists before this time. 



