THE NAUTILUS. 23 
posterior valve very small with a subcentral inconspicuous ver- 
tex at the anterior third; anterior valve with nine, middle valves 
with two, posterior valves with two slits, the interior lines of 
which are marked by a row of minute pores; the middle of the 
valves on each side of the median suture conspicuously porous 
internally. Length in alcohol 8, maximum breadth 6 mm. 
U. S. Nat. Mus. Cat. No. 383018. 
St. Paul Island, Bering Sea. 
This differs from the type of the genus S. brandtii Midden- 
dorff in color, form, characters of the girdle and depression of 
the body; S. brandtii has nine slits in the posterior valve which 
is proportionately larger. If additional specimens confirm its 
peculiarities, S. multicolor may perhaps form a special subdivis- 
ion of the genus. 
A NEW SPECIES OF PYRAMIDULA FROM ALABAMA AND NOTES ON 
P, CUMBERLANDIANA WITH NEW VARIETIES. 
BY GEO. H. CLAPP. 
PYRAMIDULA PicTAn. sp. Pl. I, Fig. 4. 
Shell thin, the color markings showing through, broadly 
umbilicate, the umbilicus dome-shaped, exhibiting all of the 
whorls to the apex and about one-fourth the diameter of the 
shell; whorls very convex above and below with a sharp per- 
fectly smooth, white carina; apex delicately granulated for nearly 
a complete whorl before the ribs begin to show, first 24 whorls 
rounded then a distinet ribbed carina is formed and the ribbing 
continues, getting gradually weaker and finally disappearing on 
the penultimate whorl. There is a distinct impressed line 
above the carina on the upper whorls. Ribs weak and almost 
obsolete on the body whorl. Body color a delicate cream tint 
with irregular, chocolate-brown blotches which stop at the 
carina; below a row of squarish blotches immediately below the 
carina and a second row of narrow flame-like markings extend- 
ing, faintly, into the umbilicus. Lip thin; aperture very ob- 
lique, much wider than high. Whorls 6. 
