TO INDIAN CAECINOLOGY. 359 



Geuus Xantho, Leacli. 



58. Xantiio iMPRESsrs (Lamarckj. 



X. impressns (Lam.), A. IMilnc-Kchvanls, Nouv. Arch. Mu.s. Hist. Nat. t. ix. p. 198, pi. vi. fig. 2 (1873). 



Ceylon, five specimens (Nevill). 



Bistribiitioii. Mauritins. ^Mergiii, New Caledonia. 



Genus MEDiEus, Dana. 



59. Med.ecs dIvStinguendus (De Haan). 



Cancer {Xantho) (listinguendus, De Haan, Crust. .Tapon. p. 18, tab. xiii. fig. 7 (1850). 

 Medmiti disti>/(/m'ndii.i (Dc Haan), Dc Man, Mergui Crust, p. 31 (1887). 

 Xantho Maqjillirrayl, Micrs, 'Alert' Crust, p. 211, pi. x.\. fig. C (1884). 



Gulf of Martaban, two young specimens {Gates). 



I have compared these and found them identical with specimens of similar size from 

 Mergui, in the British Museum, which were referred by De Man — and as I think correctly — 

 to De Haan's species. Xantho 3Iacgillivrayi, Miers, from Australia, of which both dry 

 and spirit specimens exist in the British Museum collection, is also in my opinion 

 referable to the same species, the differences being unimportant ; indeed Dc Haan's figure 

 is a better representation of X. Macgillicfayi than is the one given in the lleport on the 

 ' Alert ' Crustacea. Miers (' Alert ' Crust, p. 530) appears to have regarded De Haan's 

 species as a variety of Leptodlus exaratus (Milne-Edw.). In old specimens the granules 

 on the hands appear to be lost, and simply a rugose appearance is left. 



Distribution. Red Sea, Mergui, Cliiiia, .lapan, N. and N.E. Australia. 



Genus Euxanthus, Dana. 

 GO. EuxANTHUs Melissa (Herbst). 



E. Melissa (Herbst), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. i. p. 293 (1865). 



Tuticorin (ThKiston); Ceylon {Hal//, Nevill). 



Distribution. Erom India to Australia and the Pacific (Eijis, Tongatabu, &c.). 



Genus Zozymus, Milne-Edwards. 

 01. Zozymus jEneus (Linn.). 



Z. u^neus (Linn.), Milne-Edwards, Hist. Nat. Crust, t. i. p. 385 (1834). 



Ceylon {Daly, Nevill). 



Distribution. Red Sea, Mascarencs, Malay Archipelago, Loo Clioo Is., Australia, South 



Pacific. 



Genus Polvcremnus, Gerstaecker. 



62. PoLYCREMXUS ocHTODES (Hcrbst). 



Galene ochtode.i (Hcrbst), Adams & White, ' Samarang' Crust, p. 43, tab. x. fig. 2 (1848) . 

 Muttuwartu Par {Thurston) ; Madras (/. Ji. H.). 



5'2« 



