"98. S. ralla.
Larger, 1.20 by .47; frontal bar absent or incomplete; costae low, narrow, not as wide as interspaces; very pale blue, faintly mottled with ashy; yellow-ash on margin and within, Joulter Keys, not common and largely dead. 65. Plate 34, figs. 8, 9." ( Maynard and Clapp in Maynard, 1921a:137)
Maynard and Clapp in Maynard, 1921