Figs. 4 G–H, J, 18
Remarks. Javania antarctica was adequately re-described by Cairns (1982). The largest of the specimens reported herein (Fig. 4 H) is 33.0 x 18.9 mm in CD, 36.3 mm in height, and 8.6 mm in PD. The species can be characterized as having a thick stereome-reinforced pedicel, and five full cycles of septa (96) following the formula: S 1– 2>S 3 >>S 4>S 5, the S 3 being only slightly less wide than the S 1–2. The axial edges of all septa are only slightly sinuous. It may be confused with Desmophyllum dianthus, but can be distinguished by its smooth, porcellaneous theca (vs costate and granular), less exsert septa, and more fragile septa.
Distribution. Previously known only from Antarctic waters off the Antarctic Peninsula, Weddell Sea, and the Scotia Ridge north to South Georgia at depths of 53–1280 m, these records extend its known distribution considerably northward to the cold temperate region off central Argentina (Fig. 18) at to the depth of 1626 m.
Material: PAT0108DR 2, 1, MNCN; PAT0108DR 7, 29, MNCN; PAT0108DR 11, 1, MNCN; PAT0108DR 15, 6, MNCN, and 1, USNM 1193321; PAT 1008 DR 1, 1, MNCN; PAT 1008 DR 12, 5, MNCN, and 2, USNM 1193320 and 1193319; PAT 1008 DR 13, 19, MNCN; PAT 1108 DR 1, 3, MNCN; PAT 1108 DR 3, 8, MNCN; PAT 1108 DR 5, 1, MNCN; PAT 1108 DR 11, 9, MNCN; PAT 1208 DR 7, 3, MNCN, and 1, USNM 1193323 and 1193324; PAT 1208 DR 9, 11, MNCN, and 2, USNM 1193315; PAT 1208 DR 14, 1, MNCN; PAT0209DR 1, 6, MNCN; PAT0209DR 3, 1, USNM 1193318 and 1193316; PAT0209DR 4, 2, MNCN; PAT0209DR 7, 1, MNCN; PAT0209DR 10, 2, MNCN; PAT0209DR 11, 3, MNCN; PAT0209DR 14, 8, MNCN; PAT0209DR 15, 4, MNCN; PAT0209DR 16, 3, MNCN; PAT0210DR 5, 3, MNCN; PAT0210DR 6, 1, MNCN; PAT0210DR 7, 1, MNCN; PAT0210DR 8, 1, MNCN; ATL0310Lo 87, 2, MNCN.