Sculpture, more or less pronounced, made of 4 spiral rows of nodules in the mid-whorls, the buttons of the two upper rows being weaker than those of the two lower ones (« tuberculis inferis majoribus » – Kobelt). The base is not as pear-shaped as in reticulatum, and bears 3 spiral cords, like in lacteum. Microholes on the whole body.

« Distribution: N. Spain (‘Travailleur’ Exp.), Setúbal Bay (‘Challenger’ Exp.), Josephine Bank (‘Josephine’ Exp.), off Marocco (‘Talisman’ Exp.) ; 217-1029 fms. […] Operculum yellowish, circular, and paucispiral, with imbricated edges. Sculpture variable, the longitudinal ribs sometimes disappearing on the last and next whorl, although the spiral ribs seem to be always present. Apex as in C. lacteum.

I have therefore given the present species the name of my friend the Rev. Robert Boog Watson, who has so admirably worked out the new species of Univalves from the ‘Challenger’ Expedition. » – J. G. Jeffreys: “On the Mollusca procured during the H. M. S. ‘Lightning’ and ‘Porcupine’ expedition”, Proceedings of the Zoological Society of London, year 1885, London, via BHL.