Land-Shells of the Xatuna Islands. 4G1 



inferne prope suturam cariiiis duabus tonuibus spiralibus cincti, 

 liru'is incroiueiiti elovatis subdistaiitilius oblique arcuutis iiistructi, 

 ultiraus ill medio biearinatus, an^ulatus, inferno convuxiusiulus 

 nifo radialim piotus, Icviter deseendens : aptrtura ciroiilaris, 

 siiperne minute sinuata ; peristoma intus paulo incrassatum, extra 

 acutura, tcnue, uudique sublate expansum, marginibus callu tenui 

 junetis. 

 Diam. maj. 7 millim., min. o-5, alt. 5*o ; apertura intus 2-5 lata. 



JIah. Sirhasscn. 



This species is remarkable for its small size, the two almost 

 contiguous spiral keels or lirae at the periphery, which also 

 pass up the spire just above the suture, but especially for the 

 peculiar epidonnis, which is produced into a sort of fringe 

 upon the caringe. 



22. Cyathopoma tricarinatum. (PI. XVI. fig. 13.) 



Testa minuta, aperte ct profunde iimbilicata, turbinata, tenuis, 

 cornea, lajvis ; anfractus quinque, apicales duo subglobosi, se- 

 quentes duo convexiusculi in medio carinati, ultimus carinis tribus 

 tenuibus promiuentibus (duabus circa medium, tertia umbilicum 

 circumdaute) instructus, baud descendens ; apertura subcircularis ; 

 peristoma intus incrassatum, marginibus callo tenui junetis, 

 externo paulo expanso, ad extremitates carinarum producto, colu- 

 mellari tenuiore. 



Diam. maj. 2-'2n millim., min. 2, alt. 2'25 ; apertura 1 alta et lata. 



Operculum nigrcscens, in medio excavatum, pallidum. 



Hab. Bunguran. 



The u])permost keel of the body- whorl is that which encircles 

 the middle of the upper volutions, and the central one passes 

 up the spire in the suture. The genus occurs in India, 

 Ceylon, Borneo, and the Philippines. 



23. Cy dolus natunensis. (PI. XVI. figs. 14-14^.) 



Testa mediocriter late umbilicata, depresse turbinata, saturate 

 castanea, strigis flavis a sutura radiantibus ct zona maculanim 

 irregulariter sagittiformium ad peripheriam ornata, epidcrmide 

 scabrosa,pilosa induta ; anfractus 5, celeriter accrescentes, per- 

 convexi, striis incremcnti obliquis aliisque spiralibus sculpti, 

 sutura profunda discreti, idtimus antice leviter descendens ; 

 apertura mediocriter magna ; peristoma intus incrassatum, sub- 

 ca?rulcum, continuum, margine dextro plane expanso, tenue, 

 superne ad suturam baud profunde siimato. 



Diam. maj. 19 millim., min. 15, alt. 13; aperturae diam. 7'o. 



Ilah, Bunguran. 



In this species the whorls are smooth and rounded, but 



