362 62 



sand, stones, coral; II. 15—18; 7 J". Koh Kahdat, 5 — 8 fath., sand, mud; II. 10 and 

 III. 4; 2 juv. 



Portunus (Achelous) tuberculosus (A. Milne Edwards). 

 Neptiiims (Hcllenns) lubercnlosus Alcock, LXVIII, 42, 1899. 



Between Koh Kut and Koh Kahdat, 10 fath., shell bottom; I. 10; 1 c?. Between 

 Koh Mesan and Cap Liant, 5 — 8 fath., sand, stones; II. 7; 1 juv. S. of Koh Mak, 

 5 — 6 fath.; II. 7; 1 juv. Koh Kahdat, 4 — 5 fath., sand, stones, coral; II. 15 18; 



1 ?. Koh Kahdat, 5—8 fath., sandy mud; II. 16 and III. 4; 1 c?. Koh Kram, 30 

 fath.; III. 2 and 21 ; 2 ? (1 ovig.). 



Portunus (Achelous) brockii (de Man). 



Nepliinus {Hellenus) brockii Alcock, LXVIII, 43, 1899. 



Koh Kahdat, 4 5 fath., sand, stones, coral; II. 15 — 18; 1 juv. S. of Koh Mak, 

 5-6 fath.; II. 17; 2 c?. Sound al Koh Chang, 3—5 fath., soft clay bottom; 1900; 1 c?. 



Portunus (Achelous) granulatus (Milne Edwards). 



Neptnniis [Achelous) granulatus Alcock, LXVIII, 4,"), 1899. 



Koh Kahdat, 4 — 5 fath., sand, stones, coral; II. 15 — 18; 6 c? 2 Ç. 



Portunus (Lupocycloporus) gracilimanus (Stimpson). 



Neplunus (Lupocycloporus) whitei Alcock, LXVIII, 44, 1899. 



Amphilrilc gracilimanus Stimpson, Smithson. Misc. Coll., XLIX, 77, pi. X, fig. 3, 1907 



Singapore, 2—3 fath.; XII. 4; 1 c?. Between Koh Kut and Koh Kahdat, 10 falh., 

 shell bottom; I. 10; 1 c? 1 Ç. Between Koh Mesan and Cap Liant, 9 fath.; 11. 4; 

 3 juv. Koh Kram, 5 fath., gravel; II. 6; 1 juv. Gulf of Rayong, 7 — 10 fath., sand, 

 mud, shells; II. 8; 2 juv. Tung Kaben, 6 fath., sand, mud, phanerogams; II. 22; 



2 juv. Koh Chuen, 30 fath., shell bottom; II; 5?. Koh Lan, 30 fath., mud; 1 J" 

 1 juv. Between Koh Bin and Cliff Rock (N. of Koh Kram), 15 fath.; III. 2; 1?. 



Portunus (Lupocycloporus) innominatus Rathbun. 



Neptunus [Lupocycloporus) gracilimanns Alcock (not Stimpson) LXVIII, 45, 1899. 



Portunus [Lupocycloporus) innominatus Hathbun, Proe. Biol. See. Washington, X.XII, p. 114, 19U9. 



Koh Kahdat, 8—10 fath., mud; I. 27; 1 ? ovig. 10 miles E. of Koh Mak, 

 20 fath., large seine; I. 28; 1 c?. 



Besides the distinguishing characters given by Alcock, the antero-lateral teeth 

 are irregular, the 2nd, 3rd, 4lh and 6lh being smaller than the others. 



