Crassispira tangolaensis: Shell small, biconic, uniformly dark, the extreme tip broken, remaining whorls 8, strongly sculptured; axial sculpture of 12 strong, somewhat retractive ribs, fading out on the base, very faint over the narrow, depressed fasciole but rising to rounded tubercles at the suture; spiral sculpture of very fine, closely spaced threads over the entire surface, on the base every third or fourth thread the strongest; aperture narrow, outer lip thickened, with a small, rounded anal sulcus near the suture; inner lip simple, canal very short, hardly differentiated. The type measures: length, 14 mm.; maximum diameter, 5.4 mm.