DIAGNOSIS. Shell: Whorls prominently and equally bi-angled, strongly sculptured. Peripheral angulation and basal angulation equal in strength, separated by a concave area. Spines and spiral cords rather weakly developed; 15 low, rounded nodules on each angulation on last whorl, and 6 weak, gemmate cords on sides of whorls. Basal callus narrow. Surface red tinged with violet, early whorls white.
Operculum: Nearly circular, with central depression and outer concentric ridge as in B. rugosa; surface pustulose; wine-red with white edges.
DIMENSIONS. Holotype: height 31 mm, diameter 30 mm; figured specimen: height 20.9 mm, diameter 22.8 mm; largest specimen seen: height 37 mm, diameter 33 mm.
TYPE LOCALITY. 32 km W. of Freetown, Sierra Leone, 25 m.
HOLOTYPE. In Museum National d'Histoire Naturelle, Paris.
MATERIAL EXAMINED. Off Tema, Ghana, W. Africa (NMW; AM; DMNH) (several).
OTHER LOCALITIES, lie du Prince, Guinea-Bissau (Portuguese West Africa), 75 m (Marche-Marchad, 1957). Tomlin & Shackleford (1915, p. 267) recorded B. rugosa from the the island of Sad Thome in the Gulf of Guinea. Mr. Peter Dance (in lift.) informed us that this specimen (Fig. 2j), now in NMW is B. jacquelineae.
Marche-Marchad (1957, p. 201) compared the shell closely with B. johnstoni (Odhner), noting that B. jacquelineae "differs by its much straighter and shorter spines, its finer and more regular spiral sculpture" (free translation). It is also smaller and taller spired than B. johnstoni.