112 THE NAUTILUS. 
the axial edge narrower, not perceptibly angular; the other varices 
are much smaller and less prominent, about seven to twelve on each 
half whorl between the larger series, sharp edged and subequal. 
Height of (decollate) shell 33, max. diameter 23 mm. 
Zeuglodon bed of the Jacksonian, near Cocoa P. O., Alabama, 
Burns and Schuchert. 
This fine species is related to S. octolineata Conrad, which is found 
in the same horizon, but has the large varices less conspicuous and 
irregularly distributed. S. octolineata is also a smaller, more cylin- 
drical shell. The present species is readily recognized by its pecu- 
liar flattened aspect recalling Ranella. 
Scala Mitchelli Dall. 
Shell rather large for the genus, thin, with rounded rather com- 
pact whorls, well marked suture and elongated spire; the color is 
yellowish white, the basal area and a band somewhat above the 
periphery dark reddish brown; surface with numerous low spiral 
ridges with wider interspaces covering the whorl, crossed by about 18 
distant rather irregular low varical threads, slightly angulated just 
in front of the suture; the young whorls show a tendency to periph- 
eral angulation; basal area well marked, bordered by a low keel, 
its spiral sculpture feeble but the varical ridges unchanged ; axis 
imperforate; aperture higher than wide, the peristome interrupted 
over the body, the pillar lip strongly reflected, the outer lip narrow, 
inconspicuously reflexed ; shell decollate but showing eight whorls, 
and originally supplied with three or four more at least; height of 
(decollate) shell 36, max. diameter 14, apical diameter at the decol- 
lation 1°5 mm. 
Found on the beach of Matagorda Island on the Texas coast by 
Hon. J. G. Mitchell, to whom it is respectfully dedicated ; the type 
is in his collection. This is the finest recent species from shallow 
water yet reported from the Gulf coast, and needs no comparison 
with any other, as no American or exotic species has been figured 
which is at all closely related to it. Ina general way it is somewhat 
like S. acuminata Sby. from Japan. 
SCULPTURE OF THE APICAL WHORLS, A NEW CHARACTER FOR DIS- 
TINGUISHING GROUPS OF BULIMULI. 
BY HENRY A. PILSBRY. 
The elassification of the American Bulimoid snails has been an 
extremely intricate problem, but much has been done by Binney, 
