384 Carcinological Fauna of India. 



than the ischium and carries the coarse hairy flagellum at its antero- 

 external angle : the exoguath is small, slender, and very inconspicuous. 



Chelipeds moderately long and rather slender, stouter and a little 

 shorter than the legs ; their freest motion is in a vertical plane : tlie 

 wi'ist is a rather elongate trigonal obconical joint. 



Legs somewhat compressed : the first pair are the longest and the 

 others decrease slightly in length in posterior succession. 



The abdomen in botli sexes is of a broad truncate-oval shape, the 

 segments from the 2nd to the 6th gradually increasing in length but 

 the 7th being narrow : in both sexes the abdomen is fringed with hairs. 



Distribution : Indo-Pacific from China and Australia to the 

 Andamans. 



In habits the species of Mictyris resemble the Ocypodes, Gelasimi 

 and Dotillse, 



76. Mictyris longicarpus, Latreille. 



Mictyris longicarpus, Latreille, Gen. Crnsfc. et Ins. p. 41 (1806) : Desmarest, 

 Cousid. Gen. Crast. p. 115, pi. xi. fig. 2, and Diet. Sci. Nat. XXVIII. p. 236 : Guerin, 

 Icon. Eeo-ne An. Crust, pi. iv. fig. 4: Milne Edwards, Hist. Nat. Crnst. IT. 37, and 

 in Cuvier Regne An. Crust, pi. xviii. fig. 2, and Ann. Sci. Nat., Zool., (3) XVIII. 

 1852, p. 154 : Dana, U. S. Expl. Exp. Crust, pt. I. p. 389 : Stimpson, Proc. Ac. Nat. 

 Sci. Philad. 1858, p. 99 : Hess. Arcliiv f. Naf-. XXXI. 1865, p. 142: Heller, Novara 

 Crust, p. 40 : A. Milne Edwards, Nouv. Archiv. du Mus. IX. 1873, p. 276 : Tozzetti, 

 Magenta Crnst. p. 185, pi. xi. figs. 5, 5o-c ; Nanck, Zeits. Wiss. Zool. XXXIV. 1880, 

 p. 22, pi. i. figs 5-7 (gastric teeth) : Haswell, Cat. Austral. Crust, p. 116 : Miers, Zool. 

 H. M. S. Alert, pp. 184, 248, and Challenger Brachyura, p. 278 : de Man, Archiv f. 

 Natnrges. LIU. 1887, i. p. 358, and Notes Leydeu Mus. XII. 1890, p. 83 : Henderson, 

 Trans. Linn. Soc, Zool., (2) V. 1893, p. 390 : Aurivillins, Zur Biol. Amphib. Dekap. 

 p. 38, pi. iii. figs. 10-11 (Mitg. K. Ges. Wiss. Upsala, 1893) : Ortmaun, Zool. Jalirb. 

 Syst. VII. 1898-94, p. 748, and in Semen's Forscbungr. Crust, p. 58 (Jena. Denks. 

 VIII): Stead, Zoologist, (4) TI. 1898, p. 307: Nobili, Ann. Mns. Genov. (2) XX. 

 1890, p. 272, 



Carapace smooth, the regions moderately convex and dividing the 

 ' inJ^ 1^1 (dorsal surface into four lobes : edge of front broadly triangular : linea 

 anoviurica very distinct. 



Chelipeds a little over 1| times the length of the carapace : a 

 strong spine at the inner angle of the ischium (sometimes absent in the 

 female) : usually some spinules along the distal part of the lower 

 border of the arm : wrist with the upper border of the outer sui'face 

 marginate, and with a tooth near the middle of the distal boi'der of the 

 inner surface ; palm much shorter than the wrist and not much more 

 than half the length of the fingers ; the upper and lower borders of its 

 outer surface are marginate, and the middle of its outer surface is 

 traversed by two divergent ridges which are continued along the 



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