Sea. N Aeris. 
VOL. I. OCTOBER, 1889. No. 6. 
RECENT ADDITIONS TO THE UNITED STATES 
SNAIL FAUNA. 
BY Hy A. PRESB. 
[Nore.—The plate illustrating this paper will accompany the concluding 
part in the next number of THE NAuTILus. ] 
PUPA calamitosa n. sp. Figs. 6, 7. 
Shell minute, cylindrical, very blunt at apex, chestnut-colored ; 
whorls 43, the first one and one-half smooth, the following regularly 
costulate-striate, the costulze separated by spaces wider than them- 
selves; last whorl abruptly turning forward, rounded beneath, en- 
circled by a slight central constriction or furrow; aperture about 
one-third the total length of shell, rounded, truneated above, con- 
tracted within; peristome thin, expanded, without crest or callous 
thickening behind ; columellar margin rather dilated ; parietal wall 
bearing two entering lamelle, one arising near the termination of 
the outer lip, the other more deep-seated, elevated, entering less 
obliquely ; columella with a strong white deep-seated obliquely en- 
tering fold; outer lip with two short white lamelle. 
Alt. 1.70, diam. .80 mill. 
Two trays of this tiny species are before me. One received from 
Henry Hemphill, collected near the mouth of San Tomas river, 
Lower California, the other collected by Orcutt near San Diego, 
Cal. Most specimens show the widening inward of the outer lip 
shown in the figure. Several specimens have only one lamella on 
the outer lip, and are rather larger than the typical form described, 
measuring 1.90 mill. alt. The second parietal lamella is usually 
much larger than the first, but in one or two specimens before me 
