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Show 1884.] CRUSTACEANS FROM MAURITIUS. 13 bearing a close external resemblance to that genus ; it is distinguished not only by the very different form of the orbits (which in Xenoph-thalmus are narrow and longitudinal, with a dorsal aspect), but also by the form of the buccal cavity and the exterior maxillipedes, concerning which nothing is stated by White. The buccal cavity in Xenophthalmus is antero-laterally arcuated, the ischium-joint short and broad, the merus as large as the ischium, narrowing to and truncated at its distal extremity, the following joint articulated with the merus at its summit, not at its antero-internal angle. MYRA FUGAX. Leucosia fugax, Fabricius, Ent. Syst. Supplemen. p. 351 (1798). Myra fugax, Leach, Zool. Miscell. iii. p. 24 (1817) ; M.-Edwards, Hist. Nat. des Crust, ii. p. 126 (1834) ; Crust, in Cuvier, Regne Animal, pi. xxv. fig. 3 ; De Haan, Crustacea in Siebold, Fauna Japonica, p. 134, pi. xxxiii. fig. 1 (1841) ; A. Milne-Edwards, Nouvelles Archives du Museum d'hist. naturelle, x. p. 45 (1874). Myra subgranulata, Kossmann, Crustaceen in Zool. Ergebnisse einer Reise in Kiistengebiete des Rothen Meeres, Brachyura, p. 65, pi. i. fig. 7 (1877), fide Hilgendorf. A n adult male is in the collection. PHLYXIA EROSA. Phlyxia erosa, A. Milne-Edwards, Journ. d. Museum Godeffroy, iv. p. 86 (1873); Nouvelles Archives du Museum d'hist. naturelle, x. p. 47, pi. iii. fig. 2 (1874). Two adult females agree in all essential characters with the description and figure of Milne-Edwards, based on types from Bass's Straits and New Caledonia, and with specimens from Savage Island, and with others from the Fijis (H.M.S. ' Herald ') in the collection of the British Museum. DYNOMENE HISPIDA. Dynomene hispida, Desmarest, Consid. generates sur la classe des Crustaces, p. 133 (footnote), and pi. xviii. fig. 2 (1825); A. Milne- Edwards, Memoire sur les Crustaces Decapodes du genre Dynomene, p. 5, pi. viii. figs. 1-15 (ex Annales des Sciences naturelles, 6me serie, Zoologie, 1878), and references to literature. A small female is in the collection *. CALLIANASSA MARTENSI, sp. n. (Plate I. fig. 1.) This form in many of its characters is closely ailed to Callianassa tridentata, v. Martens2, from Java, but is distinguished by the form of the penultimate joint of the third pair of legs, which is not trilobate as in the description of v. Martens, and in a specimen apparently belonging to C. tridentata from Ceylon, in the collection 1 The British Museum has lately received a specimen of the rare Dynomene prcedator, A. Milne-Edwards, from Tamatave, Madagascar (The Bev. Beans Cowan). This species, which Milne-Edwards records from the Samoa Islands and New Caledonia, has been hitherto a desideratum in the Museum Collection. 2 Monatsb. d. Akad. Wissenschaft. zu Berlin, p. 614 (1868). |