Tribe Brachyura. 



Subtribe Oxystomata. 

 Family Dorippidæ. 



Dorippe dorsipes (Linnæus). 



Dorippe dorsipes Alcock, LXV, 277. 189t). 



Between Koh Mesan and Cap Liant, 9 fath.; II. 4; 1 juv. Koh Kam, 5 fath., 

 gravel; II. 6; 1 juv. Koh Kahdal, 5 8 fath., sandy mud; II. 16 and III. 4; 1 juv. 

 North side of Koh Mesan, 10—15 fath., stones, shells; II; 1 juv. Tung Kaben, 6 

 fath., sand, mud, phanerogams; II. 22; 1?. Koh Lan, 30 fath., mud; III. 2; 1 juv. 

 Koh Kram, 30 fath.; III. 2 and 21; 1 juv. 



In the adults that I have examined, the carapace of both sexes is broader 

 than long. In young specimens the eyes project laterally beyond the external spine 

 of the orbit. 



Dorippe facchino (Herbst). 



Dorippe facchino Alcock, LXV, 278, 1896. 



Coast of Lem Ngob, 0—1 fath., stones and sand; XII;1?. Koh Kahdat, 8—10 

 fath., mud; I. 27; 1?. Koh Kahdat, 5—8 fath., sandy mud; II. 16 and III. 4; 3 ? 

 ovigerous. Sound at Koh Chang, 3—5 fath., soft clay; 1900; 1 juv., soft shell. 



Dorippe astuta Fabricius. 



Dorippe astuta Alcock, LXV, 280, 189G. 



Mouth of the river, Paknam-wen, in Chinamen's tow-nets; I. 30; 1 d*. Koh 

 Chik; II. 2; 1 $ ovigerous. Koh Chang, near the Station, low water; III. 10; 1 juv.; 

 crept about with a large leaf over it. 



The third segment of the male abdomen has a blunt transverse ridge which 



is bilobed. 



Family Leucosiidæ. 



Subfamily LeucosUnæ. 

 Oreophorus rugosus Stimpson. 



Oreoptiorus rugosus Stlmpson, Smithson. Misc. Coll., XLIX, 159, pL XIX, fig. 6. (> a, 1907. 

 Koh Kam, 5 fath., gravel; II. 6; 1 Ç immature. 



