230 ZOOLOGY OF THE FAR EAST. 



Genus Metopograpsus, Milne-Edwards. 

 Metopograpsus messor, (Forskâl) Milne- Edwards. 



1900. Metopograpsus messor, Alcock, Journ. Asiat. Soc. Bengal, I,XIX, p. 397. 

 1918. Metopograpsus messor, Tesch, Decap. Brachyur. ' Siboga'-Exped., I, p. 79. 

 Two dead specimens were found at Kaw Deng at the mouth of the Tale Sap. 

 The carapace of the largest is 20 mm. in breadth. 



Metopograpsus maculatus, Milne-Edwards. 



1900. Metopograpsus maculatus, Alcock, Journ. Asiat. Soc. Bengal, LXIX, p. 398. 

 1918. Metopograpsus maculatus, Tesch, Decap. Brachyur. ' Siboga '-Exped., I, p. 80. 



Two examples of this species, including an ovigerous female with carapace 22 

 mm. in breadth, were obtained at the mouth of the Prai River, on the mainland 

 opposite Penang ; they were living under stones on a mud flat exposed at low water. 

 Two others were found under stones on the shore of Koh Yaw in the outer lake of the 

 Tale Sap. The specific gravity of the water at the latter place (corrected) was 

 1-00625. 



Metopograpsus quadridentatus, Stimpson. 



1858. Metopograpsus quadridentatus, Stimpson, Proc. Acad. Sci. Philadelphia, p. 102. 



1883. Metopograpsus quadridentatus, de Man, Notes Leyden Mus., V, p. 158. 



1895. Metopograpsus quadridentatus, de Man, Zool. Jahrb., Syst., IX, p. 76, fig. 16. 



1901. Metopograpsus quadridentatus, Nobili, Boll. Mus. Torino, XVI, no. 397, p. 3. 



1907. Metopograpsus quadridentatus, Stimpson, Smiths. Misc. Coll., XIvIX, p. 115, pi. xvi, fig. 2. 

 1910. Metopograpsus quadridentatus, Rathbun, Danske Vid. Selsk. Skrift., (7), naturvid. og 



math., V, p. 325. 

 1918. Metopograpsus quadridentatus, Tesch, Decap. Brachyur. ' Siboga'-Exped., I, p. 79. 



Five specimens were found in company with M. maculatus at the mouth of the 

 Prai River near Penang. In the largest example, a male with carapace 20-5 mm. in 

 length and 2475 mm. in breadth, the chela precisely resembles the figure given by de 

 Man {loc. cit., 1895). 



M . quadridentatus has not so far been found in Indian waters. It has been re- 

 corded from Macao (Stimpson), Amoy (de Man), ' Malacca ' (de Man), Borneo (Nobili) 

 and from the east coast of the Gulf of Siam (Rathbun) . 



Subfamily VARUNINAE. 



Genus Varuna, Milne-Edwards. 



Varuna litterata (Fabr.), Milne- Edwards. 



1900. Varuna litterata, Alcock, Journ. Asiat. Soc. Bengal, LXIX, p. 401. 

 1915. Varuna litterata, Kem-p, Mem. Ind. Mus., V, p. 2^2. 



Several specimens were obtained in the outer lake of the Tale Sap, at and near 

 Singgora and at Koh Yaw. They were found in fishermen's nets, under stones on the 

 shore, and in pools and ditches. The specific gravity of the water in which they were 

 taken varied from about 1-004 to 1-0085 (corrected). Crabs of this species were also 

 taken in the Patani River, fifty miles to the south-east of the Tale Sap, in water that 

 was quite fresh, though subject to tidal influence. 



