"[C. eximium] Var. fraternum n. v. Pl. 38, figs. 79, 80.
Shell finely rib-striate, streaked and striped with reddish-brown on a white ground, as in C. eximium, from which it differs in the following particulars: The form is short, broad and oval; whorls 8½; umbilical area much smaller; interior without a spiral ridge and gutter encircling the central column; parietal lamella decidedly stronger.
Length 17 2/3, diam. 9 mill.
Length 14 2/3, diam. 7 ½ mill. San Salvador, (Bland)."
(Pilsbry, 1902:265-266).