Carcinological Fauna oj India. 44!7 



In the Indian Museum there are 13 specimens from the Andamans 

 and the Coromandel coast (besides specimens from Tahiti and Mada- 

 gascar). 



Ortraann considers that this form is only a variety of the "West 

 Indian G. Gtiankumi, with which he regards the West African 

 C. armatum as synonymous. So far as I can judge from single speci- 

 mens of these two supposed species, I should think that this view is 

 correct. 



129. Gardiosoma hirtipes, Dana. 



Cardisoma hirtipes, Dana, Proc. Ac. Nat. Sci. Philad. 1851, p. 253, and U. S. 

 Expl. Exp. Crnst. pt. I. p. 376, pi. xxiv. figs, 2, a-d : Milne Edwards, Ann. Sci. Nat., 

 Zool., (3) XX. 1853, p. 205 : Hess, Archiv f. Naturges. XXXI. 1865, i. p. 140 : 

 Heller, Novara Crust, p. 35 : Miers, Cat. Crnst. New Zealand, p. 53 : de Man, Notes 

 Leyden Mas. II. 1880, p, 34, and Archiv f. Naturges. LIII. 1887, i. p. 349, pi. xiv. 

 fig. 3 : E, Nauck, Zeits. Wiss. Zool. XXXIV. 1880, p. 2G (gastric teeth) : Filhol, Crust. 

 N. Z. in Miss, rile Campbell, p. 460 : Ortmann, Zool. Jahrb., Syst., VII. 1893-94, 

 p. 737 : Whitelegge, Mem. Austral. Mas. III. 1897, p. 138 : Nobili, Ann. Mua. Genov. 

 (2) XX. 1899, p. 271. 



Discoplax longipes, A. Milne Edwards, Ann. Soc. Eatomol, France, (4) VII. 

 1867, p. 284, and Nouv. Archiv. du Mus. IX. 1873, p. 294, pi. xv. (sec Ortmann, I.e.). 



This species is easily distinguished from 0. carnifex by the 

 following characters : — 



(1) the carapace is much less convex, the regions are much more 

 distinctly defined, and the gastric region is distinctly subdivided, by 

 grooves, into 3 areolae : moreover there are some fine oblique striaB on 

 the sides of the epibranchial regions : 



(2) the sides of the front, or inner boundaries of the orbit, are 

 not nearly so oblique : the upper border of the orbit is less sinuous and 

 runs slightly forwards to the outer orbital angle : the greatest width of 

 the oi'bit is nearly two-thirds the length of that cavity. The basal 

 antenna joint does not touch the front : 



(3) the breadth of the buccal cavern, measured across the middle 

 of the meri of the external maxillipeds, falls considerably short of the 

 length measured in the middle line : 



(4) the chelipeds may be unequal but are far more commonly 

 equal, even in old specimens in which the palms and fingers have grown 

 long and the palm become enlarged : 



(5) the bristles on the legs are more thickly set, and they occur 

 along the whole of the anterior border of the merus : 



(6) the 7th segment of the male abdomen is more than half the 

 length of the 6th, measured in the middle lino. 



789 



