738 MB. W. P LANCHESTER ON CRUSTACEANS [June 19, 



case in his females from the Mergui Archipelago, so perhaps it is a 

 sexual distinction. 



In three females and a male from the Mergui collection, which I 

 have examined, the actual colour varies from a deep black to a very 

 pale brown. 



Dim. 22x16. 



XXVI. Genus Leptodius A. M.-Edw. 



44. Leptodius exaeatus M.-Edw. 



Chlorodius exaratus, M.-Edw. Hist. Nat. Crust, t. i. p. 402 

 (1834). 



Xaniho affmis, de Haan, Crust. Japon. p. 48, pi. xiii. f. 8 (1839). 



Leptodius exaratus, A. M.-Edw. Nouv. Arch. Mu*. t. ix. p. 222 

 (1873) ; Henderson, Trans. Linn. Soc, Zool. vol. v. p. 362 (1893); 

 de Man, Zoolog. Jahrb. Bd. viii. p. 521 (1895). 



Hub. Singapore ; littoral. Several young examples. 



Dim. 6 10x7. 6 9-5x7. 6 10-5x7-25. <5 7-25x5-25. 

 d 7-25x5-5. $ 12x8. $ 9x6-5. $ 8x6. $ 9x6-5. 

 $ 6-75x5. $ 7-5x5-5. $ 7x5. $ 8-5x6. 



44 a. Leptodius exaratus gracilis. 



Chlorodius gracilis, Dana, U.S. Expl. Exped. p. 210, pi. xi. 

 f. 13 (1852). 



Leptodius exaratus, var. gracilis, Miers, ' Alert ' Crust, p. 530 

 (1884). 



Hob. Singapore ; littoral, together with the species. A male 

 and a female. 



Dim. 6 14-5x9-5. $ 17x12. 



XXVII. Genus Etisus M.-Edw. 



45. Etisus levimanus Eandall. 



Etisus levimanus, Randall, Journ. Ac. Nat. Sci. Philad. vol. viii. 

 p. 115 (1839); Dana, U.S. Expl. Exped., Crust, pt. i. p. 185, 

 pi. x. f. 1 (1852). 



Etisus macrodactylus, Jacq. et Lucas, Voyage au Pole du Sud, 

 Crust, p. 30, pi. ix. f. 2 (Hombrou et .Jacquinot, tome iii. 1853). 



Etisus levimanus, A. M.-Edw. Nouv. Arch. Mus. t. ix. p. 234 

 (1873). 



Hah. Siugapore ; littoral. Two males. One of these is orna- 

 mented with a large, oval, brown spot on the gastric region, and 

 other brown spots dotted more or less regularly over the carapace 

 generally. 



Dim. 6 63-5x40. 6 68-5 x 41-5. 



46. Etisus utilis Jacq. et Lucas. 



Etisus utilis, Jacq. et Lucas, Voyage au Pole du Sud, Crust. 



