1896.] A. Alcock — Car etiological Fauna of India. 205 



surmounted in the middle line by a raised cluster of granules, terminat- 

 ing, but discontinuous with, the carina of the carapace : 



(4) in addition to the 3 spines on the posterior margin of the 

 carapace there is a spine or spinule on either postero-lateral margin 

 above the last pair of legs : 



(5) on the antero-lateral margin, immediately behind the branchio- 

 hepatic notch, are several denticles. 



The chelipeds are not quite twice the length of the carapace : they 

 are slender, and their constituent pieces have the same proportions as in 

 the adult female of M. fugax. 



The carapace of an average specimen is 8"5 millim. long and 8 

 millim. broad. 



In the Indian Museum are 29 specimens from both coasts of the 

 peninsula. Commonest at about 25 fathoms. 



I regard these as the very young of M. fugax first because among 

 57 specimens of that species in the Indian Museum there is not a single 

 very young one, and secondly because a fine large adult male of that 

 species in our collection has the additional spine well developed on one 

 side. Again t it is suggestive that although M. pentacantha appears to 

 be a common enough form, it is never found as an adult. 1 



42. Myra affinis, Bell. 



Myra affinis, Bell, Trans. Linn. Soc. Vol. XXI. 1855, p. 296, pi. xxxii. fig. 2, and 

 Cat. Leucos. Brit. Mus., p. 12 : Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 160 

 Haswell, P. L. S. N. S. Wales, IV. 1879, p. 50, and Cat. Austral. Crust., p 121 

 Miers, Zool. H. M. S. 'Alert' pp. 184, 150, and 'Challenger' Brachyura, p. 315 

 A. 0. Walker, Journ. Linn. Soc, Zool., XX. 1890, p. 111. 



Myra mamillaris, Miers (nee Bell), Miers, Trans. Linn. Soc. (2) I. 1875-79 

 (1877) p. 239, pi. xxxviii. figs. 25-27, and ' Challenger' Brachyura, p. 315. 



Myra subgranulata, Kossmann, Eeise roth. Meer. Crust., p. 65, pi. i. fig. 7, and 

 Archiv. fur Naturg. XLIV. 1878, p. 256. 



? Myra australis, Haswell, Proc. Linn. Soc. N". S. Wales, IV. 1879, pp. 50 and 

 404, pi. v. fig. 3, and Cat. Austral. Crust., p. 122: Miers, Zool. H. M. S. 'Al?rt' 

 pp. 184, 251, and ' Challenger ' Brachyura, p. 315 : A. O. Walker, Journ. Linn. Soc. 

 Zool., XX. 1890, p. Ill : J. E. Henderson, Trans. Linn. Soc, Zeal., (2) V. 1S93, 

 p. 402. 



Myra punctata, de Man, Journ. Linn. Soc, Zool., XXII. 1878, p. 205 (nee synon). 



Differs from Myra fugax, adult males being compared, in the 

 following characters :— 



(1) the carapace, including the surface of the sub-hepatic facet, is 

 covered with crisp granules, all very plainly visible to the naked eye ; 

 its longitudinal median carina is persistent and granular ; its posterior 

 marginal spines are shorter and blunter, the middle one being sharp 

 and recurved, the lateral oues dentiform : 



