756 Mil. W. t. LANCHESTEE ON CETJSTACEANS [June 19, 



XLIX. Genus Vaeuna M.-Edw. 



81. Vaeuna littebata Fabr. 



Cancer litteratus, Fabr. Suppl. Ent. Syst. p. 342 (1798); Herbst, 

 Naturgesch. d. Krab. iii. p. 58, pi. xlviii. f. 4 (1799). 



Varuna Utterata, M.-Edw. Hist. Nat. Crust, t. ii. p. 95 (1837). 



Grapsus (Trichopus) litteratus, de Haan, Crust. Japon. p. 32 

 (1839). 



Varuna Utterata, Hasw. Cat. Austr. Crust, p. 103 (1882) 

 Henderson, Traus. Linn. Soc, Zool. vol. v. p. 391 (1893). 



Hab. Singapore ; from off a floating log of wood. Two males 

 and four females. 



The shape of the frontal margin is slightly variable. According 

 to Herbst, it is " in der Mitte ein wenig aufgeschnitten " : and his 

 figure shows it to be very distinctly concave. Of these specimens 

 it is very slightly, yet distinctly coucave in three ; in the other 

 three it is straight. 



Dim. {a) With straight front. 



tf 31-5x30. ? 26-5x25-75. ? 21x20. 

 (6) With concave front. 



<S 29 x 26-5. $ 30-5 x 285. ? 2575 x 25. 



L. Genus Sesaema Say. 



82. Sesaema quadeata Fabr. 



Cancer quadratus, Fabr. Suppl. Ent. Syst. p. 341 (1798). 



Sesarma quadrata, M.-Edw. Hist. Nat. Crust, t. ii. p. 75 (1837) ; 

 Hilgendorf, von d. Decken Eeise, p. 90, pi. iii. f. 3 c (1869). 



Sesarma quadratum, A. M.-Edw. Nouv. Arch. Mus. t. ix. p. 302 

 (1873). 



Grapsus (Pachysoma) quadratus, de Haan, Crust. Japon. p. 62, 

 pi. viii. f. 3 (1839). 



Grapsus (Sesarma) affinis, de Haan, t. c. p. xxx. 



Sesarma aspera, Heller, Crust, der Novara Eeise, p. 63, pi. vi. 

 f. 1 (1867) ; de Man, Mergui Crust, p. 169 (188S). 



Sesarma quadrata, Henderson, Trans. Linn. Soc, Zool. vol. v. 

 p. 392 (1893). 



Hab. Singapore ; taken from under decayed logs of wood on 

 marshy ground a short distance from the sea. Two males : typical 

 specimens of S. quadrata, with eleven tubercles on the dactyl. 



Sesarma aspera Heller I judge to be a variety of S. quadrata, 

 and not distinct. 



Dim. rf 19-5x16. <j 14x11-5. 



83. Sesaema tjeniolata White. 



Sesarma tmiiolata, White, List Crust. Brit. Mus. p. 38 (1847). 



Sesarma mederi, M.-Edw. Ann. Sci. Nat. t. xx. p. 185 (1853). 



Sesarma tceniolata, de Man, Mergui Crust, p. 181 (1888) ; id. 

 Zoolog. Jahrb. Bd. ix. p. 166 (1897); Burger, Zoolog. Jahrb. Bd. vii. 

 p. 615 (1894). 



