€6 PERCY SLADEN TRUST EXPEDITION. 
Genus UCA, Leach, 1815. 
13. Uca tetragonum (Hbst.). 
Aleock, Journ. As. Soc. Bengal, Ixix. i. 3, p. 357. 
Localities. Common throughout the Indian Ocean. Specimens from mangrove-swamp, 
Mahé, Seychelles, and barachois, Diego Garcia, Chagos. 
14. Uca annulipes (H. M.-Edw.), 1837. 
Aleock, Journ. As. Soc. Bengal, Ixix. 11. 3, p. 353. 
Localities. Common throughout the Indian Ocean. Specimens from mangrove-swamp, 
Praslin, Seychelles. 
ANOMURA, PAGURIDEA. 
Family Cenobitide. 
Genus BIRGUS, Leach, 1815. 
15. Birgus latro (Linn.), 1767. 
Ortmann, Zool. Jahrb., Abh. f. Syst. vi. p. 319. 
Localities. Common throughout the Chagos Archipelago. Specimens from Salomon, 
Egmont, and Peros Banhos Atolls. 
Genus CA@NOBITA, Latr., 1826. 
The following species of this genus are all common throughout the Indian Ocean. 
16. Cenobita perlatus, H. M.-Edw., 1837. 
Ortmann, Zool. Jahrb., Abh. f. Syst. vi. p. 319. 
Localities. Specimens from Salomon and Peros Banhos, Chagos. 
17. Cenobita rugosus, H. M.-Edw., 1837. 
Ortmann, /. c. p. 317. 
Localities. Specimens from Coetivy, Seychelles; St. Joseph, Amirante ; Farquhar; 
Salomon and Peros Banhos, Chagos. 
18. Caenobita compressus, H. M.-Edw., 1837. 
Ortmann, /. c. p. 318. 
Localities. Specimens from Ile de Passe, Salomon Atoll, Chagos. 
19. Caenobita clypeatus, Latr., 1826. 
Ortmann, /. c. p. 315. 
Localities. Specimens from Silhouette I., Seychelles; Salomon and Peros Banhos, 
Chagos. 
