98 THE NAUTILUS. 
Mr. P. B. Randolph at Seattle, and Mr. Henry Hemphill in several 
localities, have brought to light a goodly array of Spheria and 
Pisidia, and regarding these the following notes may be of interest. 
Spherium primeanum Clessin. This shell, described in the Mon- 
ograph of the Cyclades, is so little known to collectors that a brief 
description will be useful. Shell large, equilateral, dark brown or 
black with lighter beaks, shining. Outline rhomboidal, a little 
more elongated and the ends more rounded than Sph. rhomboideum 
Say, but the dorsal aspect very much like that of the species. The 
full, rounded beaks make the vertical section broadly cordate. One 
specimen, chestnut colored and with yellow border, is so close to 
Sph. rhomboideum as to be held in doubt. That species has been 
found in northern Idaho, and may naturally be expected from 
Washington. S. primeanum was found in Lake Washington, Seattle. 
S. dentatum Hald. Handsome, bright green shells, differing only 
in color from brownish Oregon specimens, are doubtfully referred 
to this species. Collected at Spokane Falls by Mrs. Mary P. Olney. 
Sph. nobile Gould. Identified by Dr. J. G. Cooper. It isa large, 
shining, dark brown shell, resembling Sph. dentatum Hald., but less 
inflated. The young shells are thin and smooth, while in S. den- 
tatum they are more heavily striated than the adult. Abundant in 
small streams, Seattle. 
Sph. occidentale Prime. Found at Spokane Falls by Hemphill. 
Sph. raymondi J. G. Cooper. Small specimens abundant in 
streams at Seattle. Larger ones in Lake Washington. Beautiful 
specimens from Spokane Falls and Chehalis River (Hemphill). 
Also found in Idaho and Vanecouver’s Island. The species was 
found originally by Mr. Wm. J. Raymond in Tuolumne Co., Cal., 
at an altitude of 8700 feet, in 1889. 
Pisidium idahoense Roper. First found by Mr. Henry Hemphill 
at Old Mission, Idaho; in 1890. Found abundantly in streams at 
Seattle by Mr. Randolph, and much larger than the types. One 
fine specimen has the following dimensions: Long. 0°45 inch ; lat. 
0°39 inch; diam. 0°30 inch. This is certainly the largest known 
species of Pisidium. 
P. variabile Prime. Streams at Seattle. Unusually large. 
P. compressum Prime. Green Lake, Seattle. 
P. abditum Hald. Common in water courses at Seattle. 
P. ultramontanum Prime. Unusually robust specimens from Seat- 
tle. As nearly every Pisidium found on the Pacific Slope has been 
