150 Bulletin Vanderhilt Marine Museum, Vol, V 



The antennulae are stocky and fold transversely within the f ossett 

 which is short and deep-cut and divided by a definite median septum. 



The antennae have the basal article very oblique, the flagellum 

 rudimentary. 



The external maxillipeds are close fitting with the distal meral 

 margin slightly notched. 



References: Ozius truncatus H. Milne Edwards, Hist. Nat. Crust., 

 t. I, p. 406, 1934.— Dana, U. S. Explor. Exped., vol. XIII, 

 Crust., pt. I, p. 230, pi. 13, fig. 4, 1852.— Stimpson, Proc. Phila. 

 Acad. Nat. Sci., vol. 10, p. 34, 1858. — Hess, Archiv. fur Naturges., 

 vol. 31, p. 137, 1865. — Haswell, Catal. Austral. Stalk and Sessile- 

 eyed Crust., p. 63, 1882. — Miers, E. J., Catal. Crust. New Zea- 

 land, p. 21, 1876. — Grant and McCulloch, Proc. Linn. Soc. New 

 South Wales, vol. 32, p. 153, 1907. — Rathbun, Rec. Austral. Mus., 

 vol. 15, p. 177, 1926-1927.— Hale, H., Trans, and Proc. Roy. 

 Soc. S. Austral., vol. 51, p. 307, 1927. 



Xantho deplanatus White, Adam, in Juke's Voy. H. M. S. ''Fly," 

 Appendix, art. 8, p. 237, 1847. 



Ozius tuberculosus H. Milne Edwards. 

 Plate 77. 



Type : Dr. Henry Milne Edwards' type came from the East Indies 

 and is deposited in the Paris Museum. 



Distribution: East Indies, (H. M. Edwards: Trincomali, Ceylon, 

 (Muller; Laurie); Sullivan Island, Mergui Archipelago, (de Man); 

 Nicobars, (de Man) ; Marquesas Islands, Samoa, (Boone) ; Mauritius; 

 rare at New Caledonia, (A. M. Edwards). 



LIaterial examined: One male, taken in coral at reef of Anaho 

 Bay, Nuka Hiva, Marquesas Islands, August 10, 1931. Two smaller 

 males, taken at Apia, Samoa, by the ''Alva." 



Technical description: Carapace moderately convex anteriorly 

 and flattish on the posterior half with the frontal and anterolateral 

 margins widely rounded, the postlateral margins sharply convergent. 

 Length of carapace equal to two-thirds or slightly more of the great- 

 est width, frontal margin equal to almost one-half the total width of 

 carapace, slightly deflected, sinuate, cut into four rounded teeth in 

 addition to the preorbital angle which is set apart. The inner or sub- 

 median pair of teeth are slightly the wider and more conspicuous; 

 immediately behind these there is a brief transverse miniature lobule, 

 which is separated posteriorly by a transverse sulcus from the paired 



