220 A. Alcock — Carcinological Fauna of India, [No. 1, 



In some specimens the free edge of the frontal lobes is more or less 

 crenulate : the outer angle of the orbit and the lateral epibranchial 

 spine are sometimes blunt: the whole of the outer surface of the hand 

 is sometimes pubescent, and the arm also. 



The species can, however, always be recognized by the uniform 

 colouration, the hairy outer surface of the hands, and the very promi- 

 nent front. 



142. Trapezia ferruginea, Latr., Miers, de Man, Ortmann. 



Trapezia ferruginea, Latreille, Encycl. Meth. X. p. 695 : Milne Edwards, Hist. 

 Nat. Crust. I. 429 : Heller, SB. Ak. Wien, XLIII. 1861 p. 349, pi. iv. fig. 40: Miers, 

 Ann. Mag. Nat. Hist. (5) II. 1878, pp. 407, 408: de Man, Notes Leyden Mus. II. 

 1880, pp. 178, 179 : Ortmann, Zool. Jahrb. Syst., X. 1897, pp. 202, 205. 



Grapsillus subinteger, Macleay in Smith's 111. Zool. S Afr., Annulosa, p. 67. . 



Trapezia cymodoce, Dana, U. S. Expl. Exp. Crust, pt. I. 257, pi. xv. fig. 5 } 

 A. Milne Edwards, Nouv. Archiv. du Mus. IX. 1873, p. 260, and Miss. Sci. Mex. 

 Crust, p. 342. 



Trapezia miniata, Lucas in Jacquinot's Voy. Astrolabe, Zool. III. Crust, p. 43, 

 pi. iv. fig. 10. 



Trapezia subdentata, Gerstaecker, Archiv. fur Naturges. XXII, 1856, i. p. 127. 



Differs from T. cymodoce, which it closely resembles in form and 

 colour, in the following particulars : — 



(1) the front as a whole is not so prominent, and its constituent 

 teeth, as well as the supra-orbital angle, are not so prominent, and 

 deep-cut : the tooth at the lower inner angle of the orbit is not so 

 sharp : 



(2) the outer angle of the orbit and the lateral epibranchial spine 

 are not nearly so spiniform in the adult : 



(3) the upper border of the hand is not so sharp, and the outer 

 surface of the hand is smooth, polished and quite hairless. 



In the Indian Museum are 25 specimens, from the Andamans, 

 Nicobars and Ceylon. 



Trapezia ferruginea var. intermedia, Miers. 



Trapezia rvfopunctata var. intermedia, Miers, Challenger Brachyura, p. 168, 

 pi. xii. fig. 2, 1886. 



Trapezia, sp. Richters in Mobius, Meeresf. Maurit. p. 152, pi. xvi. fig. 13, 1880. 

 Differs from T. ferruginea only in colouration. 



The carapace, legs, arms and wrists are covered with light brown 

 rather blotchy spots, while the upper surface of the hands is marked by 

 a network of fine brown lines. 



Trapezia ferruginea var. guttata, Riipp. 



Carapace light brown, edge of front brick-red: chelipeds with a network 

 of fine pinkish-brown lines : legs with small pink spots. 



Twelve specimens have just been dredged by Dr. A. R. S. Anderson of the 

 "Investigator," off Great Coco I. (Andamans). 



