1900.] A, Alcook — Cdrcinohgical Fauna of India. 381 



XVIII. 1852, p. 159 : Heller, SB. Ak. Wien, XLIII. 1861, i. p. 362 : de Man, Notes 

 Leyden Mas. III. 1881, p. 255, and Archiv f . Naturges. LIII. 1887, i. pi. xv. fig. 3, and 

 Jonrn. Linn. Soc, Zool., XXII. 1887-88, p. 124, and Zool. Jaltrb., Syst. VIII. 

 1891-95, p. 578 : J. R. Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 389 : 

 Orfcmann, Zool. Jahrb., Sysfc. VII. 1893-94, p. 745 (?) and X. 1897-98, pp. 341, 312. 



Macrophthalmus affinis, Guerin, Mag. de Zool. II. 1838, pi. xxiv. fig. 2 : Milne 

 Edwards, Ann. Sci. Nat. (3) XVIII. 1852, p. 158: Hasvvell, Cat. Austral. Crust, 

 p. 88 (apud Ortmann). 



Carapace studded with minute granules not always plainly visible 

 to the naked eye, its length in the male about two-thirds of its breadth. 

 The lateral borders are parallel and the antero-lateral angle is rather a 

 square-cut lobe than a tooth. On the epibranchial regions, behind the 

 branchial groove, are two nearly parallel obliquely-longitudinal finely- 

 granular lines, the inner of which is faint. 



Front, at its narrowest part, about an eighth the breadth of the 

 carapace, longitudinally grooved, but its free edge is straight and not 

 bilobed. 



Orbits little sinuous and little oblique, their upper border micro- 

 scopically, their lower border finely and evenly denticulate. Eyes talks 

 slender, hardly curved, the eyes reach almost to the end of the orbital 

 trenches. 



When the flagella are folded there is not much space between the 

 external maxillipeds : the suture between the ischium and merus of 

 these appendages is hardly oblique. 



In the male the chelipeds and legs have much the same general 

 proportions as in M. pectmipes, but they are unarmed, except for a small 

 subterminal denticle on the anterior border of the meropodites of the 

 first three pairs of legs : on the other hand the inner surface of the 

 joints of the chelipeds, and the upper surface of the leg- joints (especially 

 of the meropodites) are densely hairy. The dactylus is more than two- 

 thirds the length of the palm, which is smooth and unsculptured : there 

 is a molariform tooth near the basal end of the dactylus, and a similar, 

 but less distinct and more oblique, tooth on the immobile finger. 



In the Indian Museum are 2 males from Mergui, besides several 

 specimens from Aden. The carapace of the largest specimen is 14 

 millim. long and 22 millim. broad. 



74. Macrophthalmus erato, de Man. 



Macrophthalmus erato, de Man, Journ. Linn. Soc. : Zool., XXII. 1887-88, p. 125, 

 pi. viii. figs. 12-14, and Zool. Jahrb. Syst., VIII. 1891-95, p. 579. 



Carapace quadrilateral, not granular to the naked eye, its length 

 about two-thirds of its breadth, the cervical groove plain, but the 



