1898.] A. Alcock — Carcinohgical Fauna of India. 219 



1897, pp. 201-216, has published a little monograph of the group, in 

 which full lists of citations will be found. 



141. Trapezia cymodoce, (Herbst) Miers, de Man, Ortmann. 



Cancer cymodoce, Herbst, Krabben III. ii. 22, pi. li. fig. 5. 



Trapezia cymodoce, Savigny and Audouin, Descr. de l'Egypte, Crust, p. 85, pi. v. 

 fig. 2 : Miers, Ann. Mag. Nat. Hist. (5) II. 1878, pp. 408, 409 : de Man, Notes Leyden 

 Mus. II. 1880, pp. 177, 178, and Jonrn. Linn. Soc., Zool., XXII. 1887-88, p. 69 : 

 Ortmann, Zool. Jahrb., Syst. X. 1897, pp. 203, 204. 



Trapezia hirtipes, Lucas in Jacquinot's Voy. Astrolabe, Zool. III. Crust, p. 44 

 pi. iv. fig. 14. 



Trapezia cserulea, Heller, SB. Ak. Wien, XLIII. 1861, p. 348. 



Trapezia dentata, A. Milne Edwards, Nouv. Archiv. du Mus. IX. 1873, p. 261. 



Carapace four-fifths as long as broad, slightly convex in both 

 directions in the adult female, almost flat in the male, smooth and 

 polished. 



Front prominent beyond the supra-orbital angle, rather deeply cut 

 into two lobes, each of which has the inner angle dentiform and still 

 further prominent, and the outer angle (though rounded) sharply 

 marked and separated by a deep notch from the dentiform supra-orbital 

 angle. 



Inner angle of lower edge of orbit acutely spiniform : outer angle of 

 orbit acute. 



Antero-lateral borders nearly parallel with one another or very 

 slightly curved outwards, an acute procurved spine marks their junction 

 with the postero-lateral borders. 



Chelipeds sub-equal in both sexes : more than 2| times the length 

 of the carapace in the adult male but not quite so long in the female : 

 the arm, which projects far beyond the edge of the carapace, has the 

 anterior border foliaceous and cut into numerous sharp teeth : inner 

 angle of wrist sharp and prominent, but not usually spiniform : hands 

 long and compressed, the upper and lower edges (especially the lower) 

 both sharp, the upper part of the outer surface of the hand (and wrist 

 also, in many cases) covered with silky wool ; fingers compressed, the 

 cutting-edges thin sharp and not much toothed. 



Legs smooth, the dactylus with rather numerous silky bristles, 

 which are also found scattered along both edges of propus and upper 

 edge of carpus. 



Colours in spirit yellowish or reddish brown, often very dark or 

 livid on the carapace ; distal two-thirds of fingers commonly dark brown. 



In the Indian Museum are 37 specimens, from the Andamans, 

 Nicobars, Mergui, Palk Straits and the Mekran coast (besides 16 from 

 other parts of the Indo-Pacific). 



