153 
2208 Holospira cionella 
Ft. Bowie, Arizona (J. H. Ferris). 
2209 Holospira regis 
Sierra Co., N. M. 
2210 MHolospira chiricahuana 
Cave creek, Chiricahua Mts., Ariz. (J. H. Ferris). 
2211 #Holospira tantalus 
New Mexico or Arizona (Edward Palmer). 
2212 Myoforceps aristatus Dillwyn. 
“My friend, F. W. Kelsey, of San Diego, Cal., recently sent 
me a peculiar Lithophagus, taken near that city, which I at once 
recognized as a Myoforceps, and Dr. Dall afterwards kindly deter- 
mined the species as M. aristatus Dillwyn. The finding of this 
interesting species, with its elongate, crossed ends, in shell ground 
which has been well worked for so many years, is worthy of note 
and to the credit of the enthusiastic collector named. The fact 
that mature specimens are found imbedded in hard rock is proof 
that it is not of very recent introduction.’’—Fred L. Button, Nau- 
tilus 13:131. March 1900. 
2213 Pupa calamitosa Pilsbry, Phila ac pr 1889 411, t 12, f 
16-17. 
Shell cylindrical, very blunt at apex, chestnut colored; whorls 
4%, the first 14% smooth, the following regularly costulate striate, 
the costule separated by spaces wider than themselves; last whorl 
abruptly turning forward. rounded beneath, encircled by a slight 
central constriction or furrow; aperture about 1-3 the total length 
of shell, rounded, truncated above, contracted within; peristome 
thin, expanded, without crest or callous thickening behind; colu- 
mellar margin rather dilated; parietal wall bearing 2 entering 
lamelle, 1 arising near the termination of the outer lip, the other 
more deeply seated, elevated, entering less obliquely; columella 
with a strong white deep-seated obliquely entering fold; outer lip 
with 2 short white lamelle. Altitude 1.7, diameter .8 mm. Near 
the mouth of the Santo Tomas river, Lower California, collected 
by Henry Hemphill; and near San Diego, Cal., by Orcutt. 
2214 £Vitrinella williamsoni Dall. 
“Shell small, white, with 2144 whorls; spire flattened; suture 
appressed with a shallow channel or excavation outside of the 
appressed margin of the whorl, outside of which the convexity of 
the whorl rises higher than the suture. Base slightly more round- 
ed than the upper side, with a wide and flaring umbilicus; per- 
iphery rounded; aperture rounded, oblique; surface polished, 
finely striate here and there by the incremental lines which are 
most prominent above. Maximum diameter of shell, 5.5; mini- 
mum diameter, 4.5; altitude 1.25 mm. Beach at San Pedro, Cal.; 
U. S. National Museum, registered number 106,855. This species, 
which is rather large for a Vitrinella, is respectfully dedicated to 
Mrs. M. Burton Williamson, to whose researches this paper is due. 
The name being inherently masculine, the usual genitive ending is 
preseryed.’’—Dall, U S Nt Mu, pr, 15:202, t 21, f 2-3 (2 Ag 1892). 
2215 Acmza morchii 
“Shell conical, much elevated, with a sub-central recurved 
apex resembling that of Helcion pectinatus covered with close-set, 
rough, imbricated ribs and riblets, the coarse, imbricated, sharp 
lines of growth forming with the other sculpture a close reticula- 
tion in some specimens, Interior with a brown-mottled spectrum 
