1898.] A. Alcock — Carcinological Fauna of India. 181 



Chelipeds massive, unequal in both sexes, the fingers pointed, not 

 hollowed. 



Abdomen of the male with all 7 segments distinct. 



103. Pseudozius caystrus (Ad. and White) Miers. 



Panopeus caystrus, Adams and White, Samarang Crust, p. 42, pi. ix. fig. 2. 



Pseudozius planus, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 81 ; and U. S. 

 Expl. Exp. Crust, pt. I. p. 233, pi, xiii, figs. 6a-h : Richters in Mobius, Meeresf. 

 Maurit. p. 148. 



Pseudozius caystrus, Miers, Challenger Brachyura, p. 142 : Ortmann, Zool. 

 Jahrb., Syst., VII, 1893-94, p. 434 ; and in Semon's Forschungsr. (Jena. Denk. 

 VIII), Crust, p. 49: de Man, Zool. Jahrb., Syst., VIII, 1895, p. 525 : Whitelegge, 

 Mem. Austral. Mus. Ill, 1897, p. 136. 



Carapace transversely oval, depressed, smooth, almost flat behind 

 the deflexed finely granular fronto-orbital region : no distinct regional 

 boundaries. 



The antero-lateral border is fairly sharp and is obscurely divided 

 into four shallow lobes, the first two of which are rounded and almost 

 confluent. 



Front between a third and a fourth the greatest breadth of the 

 carapace, bluntly four-partite. 



Orbits with the margins entire, eyes small. 



The buccal cavern is distinctly narrower anteriorly than posteriorly. 



Chelipeds unequal, very massive, quite smooth to the naked eye ; 

 two strongish tubercles at the inner angle of the wrist ; fingers arched, 

 pointed, in the adult male they meet only at tip. 



Legs smooth, dactyli furred, a few fine scattered silky bristles on 

 the propodite. 



Colours in spirit brownish yellow, fingers darker. 



In the Indian Museum are 63 specimens, mostly from the An- 

 damans, but also from the Mekran (Baluchistan) coast, the Laccadives, 

 and Bombay or Aden. (Also 2 from Samoa and 1 from Bantam J . 



Subfamily V. Oziinj:. 



Alliance I. Ozioida. 



Ozius. Epixanthus. 



Ozius, Edw. 



Ozius, Milne Edwards, Hist. Nat. Crust. I. 404. 



Ozius, Dana, Silliman's Journ. (2) XII. 1851, p. 127 ; and U. S. Expl. Exp. 

 Crust, pt. I. p. 229. 



Ozius, A. Milne Edwards, Ann. Sci. Nat. Zool. (4) XX. 1863, p. 289 j and Nouv. 

 Archiv. da Mus. IX. 1873, p. 237 ; and Miss. Sci. Mex., Crust, p. 27ti. 



