C4 PERCY SLADEN TRUST EXPEDITION. 
Family Grapside. 
Subfamily Grapsine. 
Genus GEOGRAPSUS, Stimps., 1858. 
2. Geograpsus crinipes (Dana), 1851. 
Alcock, Journ. As. Soc. Bengal, Ixix. 1. 8, p. 395 (1900) *. 
Localities. Common everywhere in the Indian Ocean. 
Specimens from mangrove-swamp, Silhouette I., Seychelles, and Salomon Atoll, 
Chagos. 
3. Geograpsus grayi (H. M.-Edw.), 1853. 
Aleock, Journ. As. Soc. Bengal, Ixix. ii. 3, p. 395 (1900). 
Localities. Common everywhere in the Indian Ocean. Specimens from Coetivy, and 
Egmont and Salomon Atolls, Chagos. 
4. Geograpsus minikoiensis, Borr., 1901. 
Geograpsus longitarsis, var. minikoiensis, Borradaile, Fauna & Geog. Maldives & Laccadives, vol. i. 
p- 66, fig. 12 (1901). 
Locality. Coetivy, Seychelles. 
Unfortunately neither of the three known specimens of this little crab is in perfect 
preservation. I think, however, that its specific distinctness is not doubtful. 
Subfamily Varunine. 
Genus VARUNA, H. M.-Edw., 1830. 
5. Varuna littorata (Fabr.), 1798. 
Alcock, Journ. As. Soc. Bengal, Ixix. 11. 3, p. 401 (1900). 
Locality. Praslin, Seychelles. 
Subfamily Sesarmine. 
Genus SESARMA, Say, 1817. 
6. Sesarma quadratum (Fabr.), 1798. 
Aleock, Journ. As. Soe. Bengal, Ixix. ii. 3, p. 413. 
The movable finger of the only male, a young individual, has only seven ridges on the 
upper edge, and the dactyles of the legs are not half the length of the propodites. 
Locality. Mangrove-swamp, Mahé, Seychelles. 
7. Sesarma longipes, Krauss, 18438. 
Alcock, Journ. As. Soc. Bengal, Ixix. ii. 8, p. 4:24. 
Alcock, who appears to have seen only female specimens, says ‘‘ there are no granular 
* The references in this paper will be limited to one for each species. So tar as possible these will be taken from 
Alcock’s work on the Indian Crabs and Coutiére’s monograph on the freshwater Paleemonidwe of Madagascar, 
