76 
above and whitish below, but gives no anatomical data.’’—Dall, 
Nautilus 14:92-98, 
1016 Pleurotoma hemphillii 
“(Drillia) Shell small, smooth, slender, polished; spire long, 
subacute, rounded at apex; longitudinally marked with incon- 
spicuous, oblique ribs, which are nearly obsolete on the body 
whorl; number of whorls 7, with well defined Sutural line, and 
just below it a parallel impressed thread-like line; shell of an 
Opaque dingy horn color; incremental lines fine, marked in some 
specimens with dingy white; mouth obliquely ovate, about one- 
third the length of the shell; labrium produced, anteriorly some- 
what thickened; sinus sutural, deep, calloused; columella thick- 
ened at base; canal very short, somewhat produced and twisted; 
one specimen shows obscure, revolving, impressed lines below 
.09 in. Habitat—Los Todos Santos bay, Lower California, where 
several specimens were Obtained by Mr. Hemphill, for whom I 
have named this well marked species.”’—Robert BE. C. Stearns 
“(Drillia) Shell Small, rather solid, elongate, slender; spire 
elevated, subacute; whorls, 7-8, moderately rounded; upper por- 
tion of larger volutions somewhat concavely angulated; suture 
distinct; color, dark purplish brown or black, surface covered 
with rather coarse, inconspicuous, revolving coste, interrupted 
on the body whorl by rude incremental lines; middle of upper 
following the suture Suggests a second indistinct series of 
nodules; aperture less than half the length of the shell; canal 
short; terminal] portion of columella whitish, slightly twisted; 
Stearns, Conchological memoranda No. 7 (28 Ag 1871); Cal ae 
pr 5:—t 1f 2 (7 Ap 1873). 
1018 Pleurotoma luctuosa Hinds 
San Pedro, Cal., to Mazatlan. 
1019 Pleurotoma tuberculifera Gray. 
San Pedro, Cal., to Gulf of California. 
1020 Polygyra harfordiana J, G. Cooper. 
Big Trees of Mariposa county, California. 
1021 Polygyra polygyrella Bland. 
Montana and Idaho. 
1022 Polygyra roperi Pilsbry. 
Shasta county, California. 
1023 Pomatiopsis intermedia Tryon. 
Hastern Oregon and Nevada to Santa Cruz, Cal. 
1024 Pompholyx effusa Lea. 
Shell roundly gibbous, rather thin, effuse, reddish horn-colored 
or greenish, whorls 5, flattened above, concave below; aperture 
subrotund, dilated, white within. Length 6, diameter 8 mm. 
Living: Pitt river, Modoc county, to Lake Tahoe, California. 
Pyramid lake, White Pine, Nevada (Henry Hemphill), 
