TO INDIAN CARCINOLOGY. 359 



Genus Xantho, Leach. 



58. Xantho impressus (Lamarck). 



X. impresms (Lam.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. ix. p. 198, pi. vi. fig. 2 (1873). 



Ceylon, five specimens (Nevill). 



Distribution. Mauritius, Mergui, New Caledonia. 



Genus Med^tjs, Dana. 



59. Med^eus disttngtjendtjs (De Haan). 



Cancer (Xantho) distinguendus, De Haan, Crust. Japon. p. 48, tab. xiii. fig. 7 (1850). 

 Medceus distinguendus (De Haan), De Man, Mergui Crust, p. 31 (1887). 

 Xantho Macgillivrayi, Miers, 'Alert' Crust, p. 211, pi. xx. fig. C (1881). 



Gulf of Martaban, two young specimens (Oates). 



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 Macgillivrayi, 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 De Haan's figure 

 is a better representation of X. Macgillivrayi than is the one given in the Report on the 

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

 species as a variety of Leptodius 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, China, Japan, N. and N.E. Australia. 



Genus Ettxanthus, Dana. 



60. Euxanthus Melissa (Herbst). 



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



Tuticorin (Thurston); Ceylon (Haly, Nevill). 



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



Genus Zozymus, Milne-Edwards. 



61. Zozymus yEneus (Linn.). 



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

 Ceylon {Hctly, Nevill). 



Distribution. Red Sea, Mascarenes, Malay Archipelago, Loo Choo Is., Australia, South 

 Pacific. 



Genus Polycremnus, Gerstaecker. 



62. Polycremnus ochtodes (Herbst). 



Galene ochtodes (Herbst), Adams & White, ' Samarang' Crust, p. 43, tab. x. fig. 2 (1848) . 

 Muttuwartu Par (Thurston) ; Madras (J. B. 3.). 



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