104 PEECY SLADEN TKUST EXPEDITION. 



209. Sistrum elatnm (Blainv.). 

 Loc. Coetivy I. 



Seychelles : Praslin I. 

 Incliidiug S.fragwm (Blainv.), a variety ocourring in the Chagos group. 



iilO. Sistrum elongattim (Blaiuv.). 

 Loc. Coetivy I. 



Seychelles : Praslin I. 



211. Sistrum fiscellum (Cheran.). 



Loc. Chagos Archipelago: Diego Garcia, Barachoii:; Maurice, and Salomon. 

 Perhaps a variety of ^S*. undatum, Chem. 



212. Sistrum horridtim. (Lam.). 

 Loc. Coetivy I. 



Seychelles : Praslin I. 

 Chagos Archipelago. 



213. Sistrum hystrix (L.). 



Loc. Coetivy I., where also the variety clathrata occurs. 



214. Sistrum. iostoma (Keeve). 



Loc. Chagos Archipelago : Diego Garcia. 



215. Sistrum mortis (Lam.), var. aspera (Lam., sp.). 

 Loc. Coetivy I. 



Seychelles : Praslin I. 

 Both the typical form and the variety occur together. 



216. Sistrum ochrostoma (Blainv.), var. cavernosa (Reeve). 

 Loc. Coetivy I. 



Seychelles : Praslin I. 



217. Sistrum spectrum (Beeve). 

 Loc. Seychelles : Praslin I. 



Chagos Archipelago. 



218. Sistrum, spinosum (A. Ad.). 

 Loc. Chagos Archipelago. 



219. Sistru'iu tuberculatum (Blainv.). 

 Loc. Coetivy I. 



Seychelles : Praslin I. 



