1900.] A. Alcock — Oarcinological Fauna of India; 399 



Distinguished from the only other Indian species by the following 

 characters : — 



The carapace is much more elongate, its length being seven-eighths 

 of its breadth, its sides are very markedly convergent posteriorly, and 

 there are no transverse markings on the post-frontal region^ 



The front is nearly three-fourths the greatest breadth of the cara- 

 pace, and its free edge is decidedly laminar and nearly straight. 



The orbits are oblique : their major diameter is less than a third 

 the breadth of the front and the inner angle of their lower border is not 

 denticulate. 



The fingers of the chela?, though their tips are spooned, are not very 

 blunt : the dactylus is much longer than the upper border of the palm. 



Except perhaps in the last pair of legs, the meropodites are nar- 

 rower, their greatest breadth being decidedly less than half their length. 



In the male abdomen the terminal segment has a somewhat three- 

 lobed appearance. 



In the Indian Museum are two specimens from Mergui. It seems 

 to me very doubtful whether they are distinct from M. latifrons, White 

 (Jukes, Voy "Fly," II. 337, pi. ii. fig. 2). 



Pachtgrapsus, Randall, Stimpson. 



Pachygrapsus, Randall, Proc. Ac. Nat. Sci. Philad. 1839, p. 126 : Milne Edwards, 

 Ann. Sci. Nat., Zool., (3) XX. 1853, p. 166 : Stimpson, Proc. Ac. Nat. Sci. Philad. 

 1858, p. 101: Kingsley, Proc. Ac. Nat. Sci. Philad. 1880, pp. 188, 198 : Miers, 

 Challenger Brachyura, p. 259. 



Differs from Metopograpsus only in the following particulars : — 

 (1) the tooth or lobe at the inner angle of the lower border of the 

 orbit is small and does not fill the orbital hiatus, so that the antennse 

 are not excluded from the orbit ; (2) there may be a tooth or two on 

 the lateral border of the carapace immediately behind the outer orbital 

 angle. 



Distribution : West Indies eastwards, through the Mediterranean, 

 to the American Pacific coast. 



88. Pachygrapsus minutus, A. M. Edw. 



Pachygrapsus minutus, A. Milne Edwards, Noav. Archiv. da Mus. IX. 1873, 

 p. 292, pi. xiv. fig. 2 : Kingsley, Proc. Ac. Nat. Sci. Philad. 1880, p. 201 : de Man, 

 Notes Leyden Mus. V. 1883, p. 158, and Archiv f. Naturges. LIII. 1887. i. p. 368, 

 and Joarn. Linn. Soc., Zool., XXII. 1888, p. 148: Cano, Boll. Soc. Nat. Napol. III. 

 1889, p. 240. 



Carapace a good deal broader than long, its whole dorsal surface 

 marked with fine transverse and oblique lines : the lateral borders are 

 J. ii. 52 



