78 PERCY SLADEN TEUST EXPEDITION. 



Pcamily LiotiidSB. ' 



14. Liotia crenata (Kien.). 



Loe. Amirantes : St. Joseph I. 



One or two specimens only, a little worn, but quite cliaracteristic. Of wide distri- 

 bution, ranging from the Philippines to Ceylon, but not yet recorded from Mauritius. 



Family TrochidaB. 



15. Troehws (Pi/ramis) mauritianus, Gmel. 

 Loc. Seychelles : Praslin I. 



Coetivy I. 



16. Trochus {Pyramis) noduliferiis, Lam. 

 Loc. Coetivy I. , 



17. Trochus {Pyramis) pyramis, Born. 

 Loc. Seychelles : Praslin I. 



Chagos Archipelago. 

 With this is included T. {Pyramis) obeliscus, Gmelin; the two appear synonymous. 



18. Trochus {Infundibulum) maculatus, L. 

 Loc. Seychelles : Praslin I. 



Coetivy I. 

 A variable, widely distributed species. 



19. Trochus {Infundibul um) radiatus, Gmel. 



Loc. Seychelles : Praslin I. (a form perhaps referable to vividus, Reeve). 

 Coetivy I. 



20. Trochus {Infundib ulum) venettis, Reeve. 

 Loc. Seychelles : Praslin I. 



21. Euchelus providentice, sp. nov. (Plate 5. fig. 1.) 



E. testa rotundo-conica, umbilicata, carnea, solidula ; anfractibus 6, quorum duo 

 apicales parvi, Iseves, coeteris ad suturas baud multum impressis, undique spiraliter 

 arctissime geminato-nodulosis, nodulis parvis, uniformibus, nitidis, ultimo anfractu 

 tridccim nodulorum ordinibus decorato; apertura rotunda, intus margaritacea, 

 liratula, labro iucrassato, intus crenulato, fere continue ; columella albo-margaritacea, 

 profunde plano-callosa, conspicue basin versus unidentata. 

 Alt. 8, diam. 7 mm. (sp. maj.). 

 Loc. Providence I. 



A roundly-conical, yellowish-pink Euchelus, everywhere closely grained with small 

 gem-like nodules, spirally arranged ; mouth roundish, within pearly, and strongly 

 spirally liratc ; peristome almost continuous, pearly, flushed with carueous pink, 

 crenulate witbin ; the callous, margaritaceous, flattened, columellar process ending in a 

 blunt conspicuous tooth below the centre. 



Two examples, the larger being selected for the type. 



