1898.] A. Alcock — Carcinological Fauna of India. 183 



completely subdivided into three areolae : branchial regions traversed 

 by two ridges, which run respectively from the 3rd and 4th lobes of 

 the antero-lateral borders, obliquely upwards and inwards to the gastric 

 region. 



Front cut into 4 equidistant teeth. Antero-lateral border rather 

 faintly divided into 5 lobes, of which the first two are broad and round- 

 ed and the last three are bluntly acuminate. Orbital margin slightly 

 tumid, well marked off from carapace ; faint traces of two grooves 

 near the outer angle ; the inner angle of the lower margin a little 

 prominent. 



The upper and outer surfaces of both wrists and of the smaller 

 hand, and the upper surface of the larger hand are reticulate-rugulose. 



Legs stout, the last three joints and part of the under surface of 

 the meropodites of all are tomentose. 



Efferent branchial foramen large, sub-quadrangular. 



Colours in spirit, dark violet brown or dark bluish brown, fingers 

 black. 



In the Indian Museum are 5 specimens, from the Andamans and 

 Arakan. 



105. Ozius tuberculosus, Edw. 



Ozius tuberculosus, Milne Edwards, Hist. Nat. Crust. I. 405 : Heller, Novara 

 Crust, p. 23 : A. Milne Edwards, Nouv. Archiv. du Mus. IX. 1873, p. 238, pi. xi. 

 fi«?. 2 : Muller, Verh. Ges. Basel VIII. 1886, p. 474 : de Man, Journ. Linn. Soc., Zool., 

 XXII. 1887-88, p. 45 : J. R. Henderson, Trans. Linn. Soc., Zool., (2) V. 1893, p. 364. 



Carapace more than two-thirds as long as broad, studded (except 

 sometimes in the central and posterior parts) with small sharp pearly 

 tubercles ; gastric region well defined and imperfectly divided into 

 elongate areolas; branchial regions crossed transversely by two cres- 

 centic furrows, which have a common starting-point at the fourth tooth 

 of the antero-lateral margin ; post-orbital furrow well defined. 



Front sunk below the level of the orbits, cut into four equidistant 

 scabrous teeth. Antero-lateral border granular, cut into five teeth 

 (exclusive of the orbital angle), of which the last is tuberculiform and 

 the first four are broad and anteriorly-acuminate. 



The lower edge of the orbit is separated from the tumid arch of the 

 upper edge by a small gap, and is deeply concave between the dentiform 

 external and internal angles. 



Basal antennal joiut massive, sinuous, granular. Efferent branchial 

 foramen large, subcircular. 



Chelipeds and legs with rough harsh surfaces : the upper and outer 

 surfaces of the wrists and hands are for the most part studded with 



