1901.] OEUSTACEA. OF THE " SKEAT EXPEDITION." 543 



c? 47 X 34. c? 47 X 33. c^ 40 x 28. $ 60 x 43-5. ? 58 x 42-5. 

 2 57x43. 2 46x34. $ 43x30-5. $ 32-5x23. 

 Breadth taken is greatest breadth. 



XVI. Genus Cymo de Haau. 



23. Cymo andreossyi Aud. 



Pilamnus ? andreossi/i, Audouin, Descr. de I'Egypte, p. 86, pi. v. 

 fig. 6 (1815). 



Of/mo andreossyi, de Haan, Crust. Japon. p. 22 (1839) ; Alyocli, 

 Jouru. As. Soc. Bang. Ixni. 2, p. 173 (1898). 



Loc. Kelantan. 



A female, rather damaged. 



Dim. 10 X 8-5. 



Breadth taken is greatest breadih. 



XVII. G-enus Thalamita Latr. 



24. Thalamita CEEifATA Latr, 



Thalamita crenata (Latr.), M.-Edw. Hist. Nat, Crust, i. p. 461 

 (1834) ; de Man, Merg. Crust, p. 79 (1888) ; Lanchester, P. Z. «. 

 1900, p. 748. 



Loc. Pulau Bidan, Penang. 



Pive males and two females. 



The follovving table serves to show the variation in respect to 

 the denticulation of the posterior border of the penultimate joint 

 of the natatory legs : — 



6. ?. 



Non-denticulate 1 



{Eight side only .... 1 1 



Left side only .... 1 1 



Both sides 2 



The number, position, and size of these denticles is quite 

 inconstant. 



Dim. cJ 71 X 46. (^ 68 X 45. J 63 x 40. S 55-5 x 36. 

 J 49x32, $57x37. $55x35-5. 



25. Thalamita dan^ Stimpson. 



Thalamita crenata, Dana, U.S. Expl. Exp., Crust, i. p. 282. 

 pi. xvii. fig. 7 (1852). 



Thalamita dance, Stimpson, Proc. Ac, Nat. Sci. Philad, p. 37 

 (1858) ; de Mau, Mergui Crust, p, 78 (1888), 



Thalamita stimpsoni, A. M.-Edw. Arch. Mus. x, p, 362, pi, xxxv. 

 fig, 4 (1861), 



Loc. Pulau Bidan, Penang, 



A male of the species and a female of the variety stimpsoni 

 In the latter the denticulations on the posterior border of the 

 penultimate joint of the natatory legs are more regular and more 

 marked, and the lobes at the upper internal angle of the eye are 

 straighter and more transverse. 



Dim. 6 39x25, $ 41x25. 



36* 



