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Show 40 MR. E. J. MIERS O N CRUSTACEA FROM [JAN. 14, RHIZOPID^E. TYPHLOCARCINUS VILLOSUS. Typhlocarcinus villosus, Stimpson, Proc. Ac. Nat. Sci. Phil. p. 96 (1858). A very small male individual is in the collection, without definite locality, which I refer to this species. The carapace and legs are clothed with a dense, short, whitish pubescence, with longer hairs on the margins, near which the scattered granules, which are elsewhere probably concealed by the hairy coat, are visible. The hands are covered with minute subseriate acute granules. The antero-lateral marginal teeth are very small, and can only be seen by removing the hairs. Length 2\, breadth 3 lines. The specimen agrees with one (a female of larger size) from the Chinese seas, in the British Museum, presented by the Smithsonian Institution. OXYSTOMATA Vel LEUCOSIIDEA. LEUCOSIID^E. L E U C O S I A HCEMATOSTICTA, junior ? Leucosia hcematosticta, Ad. and White, Zool. Samarang, Crust. p. 54, pi. xii. fig. 2 (1848); Bell, Trans. Linn. Soc. xxi. p. 289 (1855) ; Cat. Leucos. Brit. Mus. p. 8 (1855) Two specimens were collected, in which the beautiful coloration is very well preserved, and which differ from the typical specimens in the British-Museum collection and White's figure as follows :-The blood-red spots on the carapace and legs are more numerous and smaller, the tubercles on the arms proportionally smaller but similarly disposed, the postabdomen of the male with the sides nearly straight and the second joint not constricted, whereas in the typical L. hcematosticta the second joint is broad at base and greatly narrowed near the distal extremity (see figure quoted). Length of male 4\ lines. Lat. 33° 10' N., long. 129° 12' E., at a depth of 36 fathoms. June, 1876. One male. A female is in the collection without definite locality. The differences mentioned, although at first sight sufficiently marked, are probably due to the difference in age of the specimens, which agree in the form of the carapace, front, thoracic sinus, and legs. The male individual obtained by Mr. Adams measures rather more than | inch (6| lines). PSEUDOPHILYRA, gen. nov. Allied to and intermediate between Leucosia and Philyra, but differing from the former genus by the absence of the pit or cavity in the subhepatic region which Prof. Bell has called the thoracic sinus, and from Philyra in the prominent tridentate front and slenderer straighter exognath of the outer maxillipeds. So far as I am aware, this genus includes only the following species Pseudophilyra tridentata and Pseudophilyra perryi, described by |