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, con- 

 cerning vchich nothing is stated by White. The buccal cavity in 

 Xenophthalmiis 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 (1/98). 



Myra fugax. Leach, Zool. Miscell. iii. p. 24 (181/) ; M. -Edwards, 

 Hist. Nat. des Crust, ii. p. 126 (1834) ; Crust, in Cuvier, Regne 

 xlnimal, 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). 



Mtjra subgranulata, Kossmann, Crustaceen in Zool. Ergebnisse 

 einer Reise in Kiistengebiete des Rothen Meeres, Brachyura, p. 65, 

 pi. i. fig. 7 (1877), fide Hilgendorf. 



An 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 hispxda. 



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. Martens^, 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 



^ The British Museum has latelj' received a specimen of the rare Dynomene 

 pradator, A.Milne-Edwards, from TaraatnTe, Madagascar {The Rev. Deans 

 Cowan). This species, which Milne-Edwards records from the Samoa Islands 

 and New Caledonia, has been hitherto a de.'iiderafum in the Museum Collection. 



2 Monatsb. d. Akad. Wissenscbaft. zu Berlin, p. 614 (1868). 



