Dr. W. H. Dall, in whose official custody lies the type of Lucina. seminula Gould, states that it is the same as Lucina pisum Reeve. Further, the name itself is preoccupied. It follows that the shell described and figured in the Voyage of the " Challenger " requires a name, which is here supplied. The height of the individual figured is 2,2; length 2,35, and depth of single valve 1,05 mm. Specimens east of Torres Straits seem less densely concentrically ribbed than those from the west. I have taken it with the preceding species in Van Diemen's Inlet, in 15 fathoms, off the Palm Islands, and at Barney Point, Port Curtis. The species is abundant off the Hope Islands.